Update ResearchKit.podspec

To 1.1.2
Fix two warnings in release build.
2015-06-09 18:35:52 -07:00 · 2015-06-09 18:31:52 -07:00 · 2015-06-09 18:15:44 -07:00 · 2015-06-08 16:49:28 -07:00 · 2015-06-08 16:46:02 -07:00 · 2015-06-08 16:42:24 -07:00
562 changed files with 18500 additions and 7890 deletions
@@ -18,6 +18,4 @@ DerivedData
 *.xcuserstate

 .DS_Store
-
-StudyDemo/ResearchKit
 *.pyc
@@ -0,0 +1,180 @@
+Contributing to the ResearchKit Framework
+===========================
+
+This page focuses on code contributions to the existing
+codebase. However, other types of contributions are welcome too, in
+keeping with the ResearchKit™ framework [best practices](../../wiki/best-practices). For example,
+contributions of original free-to-use survey content, back-end integrations,
+validation data, and analysis or processing tools are all welcome. Ask
+on [researchkit-dev](https://lists.apple.com/mailman/listinfo/researchkit-dev) or [contact us](https://developer.apple.com/contact/researchkit/) for guidance.
+
+
+Contributing software
+---------------------
+
+This page assumes you already know how to check out and build the
+code. Contributions to the ResearchKit framework are expected to comply with the
+[ResearchKit Contribution Terms and License Policy](#contribution); please familiarize yourself
+with this policy prior to submitting a pull request. For any contribution, ensure that you own
+the rights or have permission from the copyright holder.  (e.g. code, images, surveys, videos
+and other content you may include)
+
+To contribute to ResearchKit:
+
+1. [Choose or create an issue to work on.](#create)
+2. [Create a personal fork of the ResearchKit framework.](#fork)
+3. [Develop your changes in your fork.](#develop)
+4. [Run the tests.](#test)
+5. [Submit a pull request.](#request)
+6. Make any changes requested by the reviewer, and update your pull request as needed.
+7. Once accepted, your pull request will be merged into master.
+
+Choosing an issue to work on<a name="create"></a>
+----------------------------
+
+To find an issue to work on, either pick something that you need for
+your app, or select one of the issues from our [issue list](../../issues). Or,
+consider one of the areas where we'd like to extend ResearchKit:
+
+* Faster 'get started' to a useful app
+* More active tasks
+* Data analysis for active tasks
+* More consent sections
+* Back end integrations
+
+If in doubt, bring your idea up on [researchkit-dev](https://lists.apple.com/mailman/listinfo/researchkit-dev).
+
+
+Creating a personal fork<a name="fork"></a>
+------------------------
+
+On GitHub, it's easy to create a personal fork. Just tap the "Fork"
+button on the top right, and clone your new repository.
+
+
+Develop your changes in your fork<a name="develop"></a>
+---------------------------------
+
+Develop your changes using your normal development process. If you
+already have code from an existing project, you may need to adjust its
+style to more closely match that in the ResearchKit framework.
+
+New components may need to expose new Public or Private
+headers. Public headers are for APIs that are likely to be a stable
+part of the interface of the ResearchKit framework. Private headers are for APIs that
+may need to be accessed from app-side unit tests, or that are more
+subject to change than the public interface. All other headers should
+be internal, "Project" headers.
+
+Please review and ensure that any contributions you make comply with
+the [ResearchKit Contribution Terms and License Policy](#contribution).
+
+Add automated tests for your feature, where it is possible to do
+so. For UI driven components where it is harder to write automated
+tests, add UI to at least one test application so that the new
+features can be reviewed and tested. Consider also whether to add new
+code to other existing demo apps to exercise your feature.
+
+Keep changes that fix different issues separate. For bug fixes,
+separate bugs should be submitted as separate pull requests. A good
+way to do this is to create a new branch in your fork for each new
+bug work on.
+
+Any new user-visible strings should be included in the English
+`Localizable.strings` table so that they can be picked up and
+localized in the next release cycle.
+
+
+Run the tests<a name="test"></a>
+-------------
+
+All unit tests should pass, and there should be no warnings. Also
+verify that test apps run on both device and simulator.
+
+Where your code affects UI presentation, also test:
+
+* Multiple device form factors (for instance, iPhone 4S, iPhone 5, iPhone 6, iPhone 6 Plus).
+* Dynamic text, especially at the "Large" setting.
+* Rotation between portrait and landscape, where appropriate.
+
+You can use the apps in the `Testing` and `samples` directories to
+test your changes.
+
+Submit a pull request<a name="request"></a>
+---------------------
+
+The reviewers may request changes. Make the changes, and update your
+pull request as needed. Reviews will focus on coding style,
+correctness, and design consistency.
+
+This process does not take the place of an ethical review, for example
+by an institutional review board (IRB) or ethics committee.
+
+After acceptance<a name="after"></a>
+----------------
+
+Once your pull request has been accepted, your changes will be merged
+to master. You are still responsible for your change after it is
+accepted. Stay in contact, in case bugs are detected that may require
+your attention.
+
+When the project is next branched for release, your changes will be
+incorporated. Queries may come back to you regarding localization,
+documentation, or other issues during this process.
+
+
+
+
+Release process
+-----------------
+
+The `master` branch is used for work in progress. On `master`:
+
+* All test apps should build and run error free.
+* Unit tests should all pass.
+* Everything should be continuously in working order in English (the
+  base language).
+
+  The project will make periodic releases. When preparing a stable release, we
+  will branch from `master` to a convergence branch. During this process,
+  changes will be made first to the convergence branch, and then merged into
+  `master`. On the convergence branch, changes will be made only to:
+
+  * Fix high priority issues.
+  * Update documentation.
+  * Bring localization up to date.
+  * Ensure good behavior across all supported devices.
+
+  After the converging process is completed, we will merge everything to the
+  `stable` branch and tag with a new release number. The most recent release
+  will be highlighted in the [README](../..). 
+
+
+  ResearchKit Contribution Terms and License Policy<a name="contribution"></a>
+  =======================================
+
+  Thank you for your interest in contributing to the ResearchKit
+  community.  In order to maintain consistency and license compatibility
+  throughout the project, all contributions must comply with our
+  licensing policy and terms for contributing code to the ResearchKit
+  project:
+
+  1.  If you are submitting a patch to the existing codebase, you
+  represent that you have the right to license the patch to the
+  community, and agree by submitting the patch that your changes are
+  licensed under the existing license terms of the file you are
+  modifying (i.e., [ResearchKit BSD license](LICENSE)).
+  Please also add your copyright (name and year) to the relevant
+  files for changes that are more than 10 lines of code.
+  2.  If you are submitting a new file for inclusion in the ResearchKit framework (no
+  code copied from another source), please include your copyright (name
+  and year) and a copy of the ResearchKit BSD license.  By submitting
+  your new file you represent that you have the right to license your
+  file to the community, and agree that your file is licensed under the
+  ResearchKit BSD license.
+  3.  If you aren't the author of the patch, you agree to include the
+  original copyright notices and licensing terms with it, to the extent
+  that they exist.  If there wasn't a copyright notice or license,
+  please make a note of it.  Generally we can only take in patches that
+  are BSD-licensed in order to maintain license compatibility within the
+  project.
@@ -5,10 +5,10 @@ The ResearchKit™ framework is an open source software framework that makes it
 create apps for medical research or for other research projects.

 * Getting Started: [Getting Started](#gettingstarted)
-* Documentation: ([Programming Guide](http://researchkit.org/docs/docs/Overview/GuideOverview.html)) ([API](http://researchkit.org/docs/index.html))
-* Best practices: [Best Practices](../../wiki/best_practices)
-* Contributing to ResearchKit: [Contributing](../../wiki/contributing)
-* Website and blog: ([researchkit.org](http://researchkit.org/index.html))  ([Blog](http://researchkit.org/blog.html))
+* Documentation: ([Programming Guide](http://researchkit.github.io/docs/docs/Overview/GuideOverview.html)) ([API](http://researchkit.github.io/docs/index.html))
+* Best practices: [Best Practices](../../wiki/best-practices)
+* Contributing to ResearchKit: [Contributing](CONTRIBUTING.md)
+* Website and blog: ([researchkit.org](http://researchkit.github.io/index.html))  ([Blog](http://researchkit.github.io/blog.html))
 * ResearchKit BSD License: [License](#license)

 Getting More Information
@@ -18,7 +18,7 @@ Getting More Information
 * Join [researchkit-dev](https://lists.apple.com/mailman/listinfo/researchkit-dev) for discussing ongoing work to improve and expand the framework.
 * Or [contact us](https://developer.apple.com/contact/researchkit/)

-Use cases
+Use Cases
 ===========

 A task in the ResearchKit framework contains a set of steps to present to a
@@ -29,14 +29,14 @@ Surveys
 -------

 The ResearchKit framework provides a pre-built user interface for surveys, which can be
-presented modally on an iPhone, iPod Touch, or iPad.  [Surveys](http://researchkit.org/docs/docs/Survey/CreatingSurveys.html)
+presented modally on an iPhone, iPod Touch, or iPad.  [Surveys](http://researchkit.github.io/docs/docs/Survey/CreatingSurveys.html)


 Consent
 ----------------

 The ResearchKit framework provides visual consent templates that you can customize to
-explain the details of your research study and obtain a signature if needed.  [Consent](http://researchkit.org/docs/docs/InformedConsent/InformedConsent.html)
+explain the details of your research study and obtain a signature if needed.  [Consent](http://researchkit.github.io/docs/docs/InformedConsent/InformedConsent.html)


 Active Tasks
@@ -45,10 +45,10 @@ Active Tasks
 Some studies may need data beyond survey questions or the passive data collection
 capabilities available through use of the HealthKit and CoreMotion APIs if you are
 programming for iOS. ResearchKit's active tasks invite users to perform activities
-under semi-controlled conditions, while iPhone sensors actively collect data.  [Active Tasks](http://researchkit.org/docs/docs/ActiveTasks/ActiveTasks.html)
+under semi-controlled conditions, while iPhone sensors actively collect data.  [Active Tasks](http://researchkit.github.io/docs/docs/ActiveTasks/ActiveTasks.html)


-Getting started<a name="gettingstarted"></a>
+Getting Started<a name="gettingstarted"></a>
 ===============


@@ -63,7 +63,7 @@ using the ResearchKit framework can run on devices with iOS 8.0 or newer.
 Installation
 ------------

-The lastest stable version of ResearchKit framework can be cloned with
+The latest stable version of ResearchKit framework can be cloned with

 ```
 git clone -b stable https://github.com/ResearchKit/ResearchKit.git
@@ -110,6 +110,8 @@ target as shown in the figure below.
 </figure>
 </center>

+Note: You can also import ResearchKit into your project using a [dependency manager](./dependency_management.md) such as CocoaPods or Carthage.
+
 ###2. Create a Step

 In this walk-through, we will use the ResearchKit framework to modally present a
@@ -120,24 +122,41 @@ Create a step for your task by adding some code, perhaps in
 simple, we'll use an instruction step (`ORKInstructionStep`) and name
 the step `myStep`.

+*Objective-C*
+
 ```objc 	
 ORKInstructionStep *myStep =
  [[ORKInstructionStep alloc] initWithIdentifier:@"intro"];
 myStep.title = @"Welcome to ResearchKit";
 ```

+*Swift*
+
+```swift
+let myStep = ORKInstructionStep(identifier: "intro")
+myStep.title = "Welcome to ResearchKit"
+```
+
 ###3. Create a Task

 Use the ordered task class (`ORKOrderedTask`) to create a task that
-contains myStep. An ordered task is just a task where the order and
+contains `myStep`. An ordered task is just a task where the order and
 selection of later steps does not depend on the results of earlier
 ones. Name your task `task` and initialize it with `myStep`.

+*Objective-C*
+
 ```objc
 ORKOrderedTask *task =
  [[ORKOrderedTask alloc] initWithIdentifier:@"task" steps:@[myStep]];
 ```

+*Swift*
+
+```swift
+let task = ORKOrderedTask(identifier: "task", steps: [myStep])
+```
+
 ###4. Present the Task

 Create a task view controller (`ORKTaskViewController`) and initialize
@@ -145,6 +164,8 @@ it with your `task`. A task view controller manages a task and collects the
 results of each step. In this case, your task view
 controller simply displays your instruction step.

+*Objective-C*
+
 ```objc
 ORKTaskViewController *taskViewController =
  [[ORKTaskViewController alloc] initWithTask:task taskRunUUID:nil];
@@ -152,10 +173,20 @@ taskViewController.delegate = self;
 [self presentViewController:taskViewController animated:YES completion:nil];
 ```

+*Swift*
+
+```swift
+let taskViewController = ORKTaskViewController(task: task, taskRunUUID: nil)
+taskViewController.delegate = self
+presentViewController(taskViewController, animated: true, completion: nil)
+```
+
 The above snippet assumes that your class implements the
 `ORKTaskViewControllerDelegate` protocol. This has just one required method,
 which you must implement in order to handle the completion of the task:

+*Objective-C*
+
 ```objc
 - (void)taskViewController:(ORKTaskViewController *)taskViewController
       didFinishWithReason:(ORKTaskViewControllerFinishReason)reason
@@ -169,6 +200,20 @@ which you must implement in order to handle the completion of the task:
 }
 ```

+*Swift*
+
+```swift
+func taskViewController(taskViewController: ORKTaskViewController, 
+                didFinishWithReason reason: ORKTaskViewControllerFinishReason, 
+                                     error: NSError?) {
+  let taskResult = taskViewController.result
+  // You could do something with the result here.
+
+  // Then, dismiss the task view controller.
+  dismissViewControllerAnimated(true, completion: nil)
+}
+```
+
 
 If you now run your app, you should see your first ResearchKit framework
 instruction step:
@@ -0,0 +1,15 @@
+Pod::Spec.new do |s|
+  s.name         = 'ResearchKit'
+  s.version      = '1.1.2'
+  s.summary      = 'ResearchKit is an open source software framework that makes it easy to create apps for medical research or for other research projects.'
+  s.homepage     = 'https://www.github.com/ResearchKit/ResearchKit'
+  s.documentation_url = 'http://researchkit.github.io/docs/'
+  s.license      = { :type => 'BSD', :file => 'LICENSE' }
+  s.author       = { 'researchkit.org' => 'http://researchkit.org' }
+  s.source       = { :git => 'https://github.com/ResearchKit/ResearchKit.git', :tag => s.version.to_s }
+  s.public_header_files = `./scripts/find_headers.rb --public --private`.split("\n")
+  s.source_files = 'ResearchKit/**/*.{h,m}'
+  s.resources    = 'ResearchKit/**/*.{fsh,vsh}', 'ResearchKit/Animations/**/*.m4v', 'ResearchKit/Artwork.xcassets', 'ResearchKit/Localized/*.lproj'
+  s.platform     = :ios, '8.0'
+  s.requires_arc = true
+end
@@ -22,6 +22,24 @@
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@@ -268,8 +286,6 @@
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@@ -291,8 +307,6 @@
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@@ -323,6 +337,10 @@
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@@ -343,6 +361,37 @@
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+		B8760F2B1AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.h in Headers */ = {isa = PBXBuildFile; fileRef = B8760F291AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.h */; };
+		B8760F2C1AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.m in Sources */ = {isa = PBXBuildFile; fileRef = B8760F2A1AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.m */; };
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+		BC13CE3A1B0660220044153C /* ORKNavigableOrderedTask.m in Sources */ = {isa = PBXBuildFile; fileRef = BC13CE381B0660220044153C /* ORKNavigableOrderedTask.m */; };
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+		BC4194291AE8453A00073D6B /* ORKObserver.h in Headers */ = {isa = PBXBuildFile; fileRef = BC4194271AE8453A00073D6B /* ORKObserver.h */; };
+		BC41942A1AE8453A00073D6B /* ORKObserver.m in Sources */ = {isa = PBXBuildFile; fileRef = BC4194281AE8453A00073D6B /* ORKObserver.m */; };
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+		FA7A9D371B09365F005A2BEA /* ORKConsentSectionFormatterTests.m in Sources */ = {isa = PBXBuildFile; fileRef = FA7A9D361B09365F005A2BEA /* ORKConsentSectionFormatterTests.m */; };
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 /* Begin PBXFileReference section */
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+		147503AE1AEE8071004B17F3 /* ORKAudioGenerator.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKAudioGenerator.m; sourceTree = "<group>"; };
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-		B1B349FA1AA10EA2005FAD66 /* fr */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = fr; path = fr.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B349FB1AA10EA8005FAD66 /* fr_CA */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = fr_CA; path = fr_CA.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B349FC1AA10EAE005FAD66 /* fi */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = fi; path = fi.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B349FD1AA10EB4005FAD66 /* es */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = es; path = es.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B349FE1AA10EBA005FAD66 /* es_MX */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = es_MX; path = es_MX.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B349FF1AA10EC1005FAD66 /* en_GB */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = en_GB; path = en_GB.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B34A001AA10EC6005FAD66 /* en_AU */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = en_AU; path = en_AU.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B34A011AA10ECB005FAD66 /* el */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = el; path = el.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B34A021AA10ED1005FAD66 /* de */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = de; path = de.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B34A031AA10ED5005FAD66 /* da */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = da; path = da.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B34A041AA10EDA005FAD66 /* cs */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = cs; path = cs.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B34A051AA10EDF005FAD66 /* ca */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = ca; path = ca.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B34A061AA10EE4005FAD66 /* ar */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = ar; path = ar.lproj/Localizable.strings; sourceTree = "<group>"; };
-		B1B34A061AABBCCDDEEFFAAA /* no */ = {isa = PBXFileReference; explicitFileType = file.bplist; name = no; path = no.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349E41AA10DED005FAD66 /* zh_HK */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = zh_HK; path = zh_HK.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349E51AA10DF8005FAD66 /* zh_CN */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = zh_CN; path = zh_CN.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349E61AA10E02005FAD66 /* vi */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = vi; path = vi.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349E71AA10E0B005FAD66 /* uk */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = uk; path = uk.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349E81AA10E12005FAD66 /* th */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = th; path = th.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349E91AA10E27005FAD66 /* sv */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = sv; path = sv.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349EA1AA10E2E005FAD66 /* sk */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = sk; path = sk.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349EB1AA10E38005FAD66 /* ru */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = ru; path = ru.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349EC1AA10E40005FAD66 /* ro */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = ro; path = ro.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349ED1AA10E47005FAD66 /* pt */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = pt; path = pt.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349EE1AA10E4F005FAD66 /* pt_PT */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = pt_PT; path = pt_PT.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349EF1AA10E56005FAD66 /* pl */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = pl; path = pl.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F01AA10E5E005FAD66 /* nl */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = nl; path = nl.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F11AA10E65005FAD66 /* ms */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = ms; path = ms.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F21AA10E6C005FAD66 /* ko */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = ko; path = ko.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F31AA10E73005FAD66 /* ja */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = ja; path = ja.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F41AA10E79005FAD66 /* it */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = it; path = it.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F51AA10E80005FAD66 /* id */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = id; path = id.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F61AA10E89005FAD66 /* hu */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = hu; path = hu.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F71AA10E90005FAD66 /* hr */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = hr; path = hr.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F81AA10E96005FAD66 /* hi */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = hi; path = hi.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349F91AA10E9C005FAD66 /* he */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = he; path = he.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349FA1AA10EA2005FAD66 /* fr */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = fr; path = fr.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349FB1AA10EA8005FAD66 /* fr_CA */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = fr_CA; path = fr_CA.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349FC1AA10EAE005FAD66 /* fi */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = fi; path = fi.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349FD1AA10EB4005FAD66 /* es */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = es; path = es.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349FE1AA10EBA005FAD66 /* es_MX */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = es_MX; path = es_MX.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B349FF1AA10EC1005FAD66 /* en_GB */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = en_GB; path = en_GB.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B34A001AA10EC6005FAD66 /* en_AU */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = en_AU; path = en_AU.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B34A011AA10ECB005FAD66 /* el */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = el; path = el.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B34A021AA10ED1005FAD66 /* de */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = de; path = de.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B34A031AA10ED5005FAD66 /* da */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = da; path = da.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B34A041AA10EDA005FAD66 /* cs */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = cs; path = cs.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B34A051AA10EDF005FAD66 /* ca */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = ca; path = ca.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B34A061AA10EE4005FAD66 /* ar */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = ar; path = ar.lproj/Localizable.strings; sourceTree = "<group>"; };
+		B1B34A061AABBCCDDEEFFAAA /* no */ = {isa = PBXFileReference; explicitFileType = text.plist.strings; name = no; path = no.lproj/Localizable.strings; sourceTree = "<group>"; };
 		B1B894391A00345200C5CF2D /* ResearchKit_Private.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; lineEnding = 0; path = ResearchKit_Private.h; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.objcpp; };
 		B1C0F4E21A9BA65F0022C153 /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/Localizable.strings; sourceTree = "<group>"; };
 		B1C1DE4F196F541F00F75544 /* ResearchKit.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ResearchKit.h; sourceTree = "<group>"; };
 		B1C7955D1A9FBF04007279BA /* HealthKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = HealthKit.framework; path = System/Library/Frameworks/HealthKit.framework; sourceTree = SDKROOT; };
+		B8760F291AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKScaleRangeDescriptionLabel.h; sourceTree = "<group>"; };
+		B8760F2A1AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKScaleRangeDescriptionLabel.m; sourceTree = "<group>"; };
+		BC01B0FA1B0EB99700863803 /* ORKTintedImageView_Internal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKTintedImageView_Internal.h; sourceTree = "<group>"; };
+		BC13CE371B0660220044153C /* ORKNavigableOrderedTask.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKNavigableOrderedTask.h; sourceTree = "<group>"; };
+		BC13CE381B0660220044153C /* ORKNavigableOrderedTask.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKNavigableOrderedTask.m; sourceTree = "<group>"; };
+		BC13CE3B1B0662990044153C /* ORKStepNavigationRule_Private.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKStepNavigationRule_Private.h; sourceTree = "<group>"; };
+		BC13CE3D1B0662A80044153C /* ORKOrderedTask_Internal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKOrderedTask_Internal.h; sourceTree = "<group>"; };
+		BC13CE3F1B0666FD0044153C /* ORKResultPredicate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKResultPredicate.h; sourceTree = "<group>"; };
+		BC13CE411B066A990044153C /* ORKStepNavigationRule_Internal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKStepNavigationRule_Internal.h; sourceTree = "<group>"; };
+		BC4194271AE8453A00073D6B /* ORKObserver.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKObserver.h; sourceTree = "<group>"; };
+		BC4194281AE8453A00073D6B /* ORKObserver.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKObserver.m; sourceTree = "<group>"; };
+		BCA5C0331AEC05F20092AC8D /* ORKStepNavigationRule.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKStepNavigationRule.h; sourceTree = "<group>"; };
+		BCA5C0341AEC05F20092AC8D /* ORKStepNavigationRule.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKStepNavigationRule.m; sourceTree = "<group>"; };
+		BCAD50E71B0201EE0034806A /* ORKTaskTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKTaskTests.m; sourceTree = "<group>"; };
+		BCB96C121B19C0EC002A0B96 /* ORKStepTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKStepTests.m; sourceTree = "<group>"; };
+		BCFB2EAF1AE70E4E0070B5D0 /* ORKConsentSceneViewController_Internal.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ORKConsentSceneViewController_Internal.h; sourceTree = "<group>"; };
+		BCFF24BC1B0798D10044EC35 /* ORKResultPredicate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKResultPredicate.m; sourceTree = "<group>"; };
+		D42FEFB61AF7557000A124F8 /* ORKImageCaptureView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKImageCaptureView.h; sourceTree = "<group>"; };
+		D42FEFB71AF7557000A124F8 /* ORKImageCaptureView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKImageCaptureView.m; sourceTree = "<group>"; };
+		D44239771AF17F5100559D96 /* ORKImageCaptureStep.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKImageCaptureStep.h; sourceTree = "<group>"; };
+		D44239781AF17F5100559D96 /* ORKImageCaptureStep.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKImageCaptureStep.m; sourceTree = "<group>"; };
+		D442397B1AF17F7600559D96 /* ORKImageCaptureStepViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKImageCaptureStepViewController.h; sourceTree = "<group>"; };
+		D442397C1AF17F7600559D96 /* ORKImageCaptureStepViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKImageCaptureStepViewController.m; sourceTree = "<group>"; };
+		D45852081AF6CCFA00A2DE13 /* ORKImageCaptureCameraPreviewView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKImageCaptureCameraPreviewView.h; sourceTree = "<group>"; };
+		D45852091AF6CCFA00A2DE13 /* ORKImageCaptureCameraPreviewView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKImageCaptureCameraPreviewView.m; sourceTree = "<group>"; };
+		FA7A9D2A1B082688005A2BEA /* ORKConsentDocumentTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKConsentDocumentTests.m; sourceTree = "<group>"; };
+		FA7A9D2D1B083DD3005A2BEA /* ORKConsentSectionFormatter.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKConsentSectionFormatter.h; sourceTree = "<group>"; };
+		FA7A9D2E1B083DD3005A2BEA /* ORKConsentSectionFormatter.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKConsentSectionFormatter.m; sourceTree = "<group>"; };
+		FA7A9D311B0843A9005A2BEA /* ORKConsentSignatureFormatter.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKConsentSignatureFormatter.h; sourceTree = "<group>"; };
+		FA7A9D321B0843A9005A2BEA /* ORKConsentSignatureFormatter.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKConsentSignatureFormatter.m; sourceTree = "<group>"; };
+		FA7A9D361B09365F005A2BEA /* ORKConsentSectionFormatterTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKConsentSectionFormatterTests.m; sourceTree = "<group>"; };
+		FA7A9D381B0969A7005A2BEA /* ORKConsentSignatureFormatterTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKConsentSignatureFormatterTests.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */

 /* Begin PBXFrameworksBuildPhase section */
@@ -749,6 +849,40 @@
 /* End PBXFrameworksBuildPhase section */

 /* Begin PBXGroup section */
+		147503AC1AEE8058004B17F3 /* Tone Audiometry */ = {
+			isa = PBXGroup;
+			children = (
+				147503AD1AEE8071004B17F3 /* ORKAudioGenerator.h */,
+				147503AE1AEE8071004B17F3 /* ORKAudioGenerator.m */,
+				147503B11AEE807C004B17F3 /* ORKToneAudiometryContentView.h */,
+				147503B21AEE807C004B17F3 /* ORKToneAudiometryContentView.m */,
+				B12EA0131B0D73A500F9F554 /* ORKToneAudiometryPracticeStep.h */,
+				B12EA0141B0D73A500F9F554 /* ORKToneAudiometryPracticeStep.m */,
+				147503B31AEE807C004B17F3 /* ORKToneAudiometryStep.h */,
+				147503B41AEE807C004B17F3 /* ORKToneAudiometryStep.m */,
+				B12EA0171B0D76AD00F9F554 /* ORKToneAudiometryPracticeStepViewController.h */,
+				B12EA0181B0D76AD00F9F554 /* ORKToneAudiometryPracticeStepViewController.m */,
+				147503B51AEE807C004B17F3 /* ORKToneAudiometryStepViewController.h */,
+				147503B61AEE807C004B17F3 /* ORKToneAudiometryStepViewController.m */,
+			);
+			name = "Tone Audiometry";
+			sourceTree = "<group>";
+		};
+		25ECC0921AFBD64800F3D63B /* Reaction Time */ = {
+			isa = PBXGroup;
+			children = (
+				25ECC0931AFBD68300F3D63B /* ORKReactionTimeStep.h */,
+				25ECC0941AFBD68300F3D63B /* ORKReactionTimeStep.m */,
+				25ECC0991AFBD8B300F3D63B /* ORKReactionTimeViewController.h */,
+				25ECC09A1AFBD8B300F3D63B /* ORKReactionTimeViewController.m */,
+				25ECC09D1AFBD92D00F3D63B /* ORKReactionTimeContentView.h */,
+				25ECC09E1AFBD92D00F3D63B /* ORKReactionTimeContentView.m */,
+				25ECC0A11AFBDD2700F3D63B /* ORKReactionTimeStimulusView.h */,
+				25ECC0A21AFBDD2700F3D63B /* ORKReactionTimeStimulusView.m */,
+			);
+			name = "Reaction Time";
+			sourceTree = "<group>";
+		};
 		3FFF18341829DB1D00167070 = {
 			isa = PBXGroup;
 			children = (
@@ -815,8 +949,10 @@
 				B12EFF4E1AB2161500A80147 /* Audio */,
 				B12EFF5D1AB2177700A80147 /* Fitness */,
 				B12EFF5E1AB2177D00A80147 /* Spatial Span Memory */,
+				25ECC0921AFBD64800F3D63B /* Reaction Time */,
 				B12EFF5F1AB2178500A80147 /* Tapping */,
 				B12EFF601AB2178B00A80147 /* Walking */,
+				147503AC1AEE8058004B17F3 /* Tone Audiometry */,
 			);
 			path = ActiveTasks;
 			sourceTree = "<group>";
@@ -833,6 +969,7 @@
 				B12EFF3D1AB2121000A80147 /* Definitions */,
 				B12EFF321AB2106F00A80147 /* UIKitCategories */,
 				B12EFF311AB2100400A80147 /* Skin */,
+				BC4194261AE8451F00073D6B /* Misc */,
 			);
 			path = Common;
 			sourceTree = "<group>";
@@ -840,6 +977,7 @@
 		86C40BEB1A8D7C5C00081FAC /* Consent */ = {
 			isa = PBXGroup;
 			children = (
+				FA7A9D2C1B083D90005A2BEA /* Formatters */,
 				B12EFF451AB214E000A80147 /* Model */,
 				B12EFF461AB2150C00A80147 /* Visual */,
 				B12EFF481AB2152D00A80147 /* Sharing */,
@@ -851,16 +989,20 @@
 		86CC8EA61AC09383001CCD89 /* ResearchKitTests */ = {
 			isa = PBXGroup;
 			children = (
-				86D348001AC16175006DB02B /* ORKRecorderTests.m */,
+				FA7A9D351B09362D005A2BEA /* Consent */,
+				86CC8EA71AC09383001CCD89 /* Info.plist */,
 				86CC8EA81AC09383001CCD89 /* ORKAccessibilityTests.m */,
 				86CC8EA91AC09383001CCD89 /* ORKChoiceAnswerFormatHelperTests.m */,
-				86CC8EAA1AC09383001CCD89 /* ORKConsentTests.m */,
 				86CC8EAB1AC09383001CCD89 /* ORKDataLoggerManagerTests.m */,
 				86CC8EAC1AC09383001CCD89 /* ORKDataLoggerTests.m */,
 				86CC8EAD1AC09383001CCD89 /* ORKHKSampleTests.m */,
+				86D348001AC16175006DB02B /* ORKRecorderTests.m */,
 				86CC8EAF1AC09383001CCD89 /* ORKResultTests.m */,
+				BCB96C121B19C0EC002A0B96 /* ORKStepTests.m */,
+				BCAD50E71B0201EE0034806A /* ORKTaskTests.m */,
 				86CC8EB01AC09383001CCD89 /* ORKTextChoiceCellGroupTests.m */,
-				86CC8EA71AC09383001CCD89 /* Info.plist */,
+				2EBFE11C1AE1B32D00CB8254 /* ORKUIViewAccessibilityTests.m */,
+				2EBFE11F1AE1B74100CB8254 /* ORKVoiceEngineTests.m */,
 			);
 			path = ResearchKitTests;
 			sourceTree = "<group>";
@@ -887,6 +1029,7 @@
 		B12EFF311AB2100400A80147 /* Skin */ = {
 			isa = PBXGroup;
 			children = (
+				BC01B0FA1B0EB99700863803 /* ORKTintedImageView_Internal.h */,
 				86C40BB71A8D7C5C00081FAC /* ORKSkin.h */,
 				86C40BB81A8D7C5C00081FAC /* ORKSkin.m */,
 				86C40B7A1A8D7C5C00081FAC /* ORKDefaultFont.h */,
@@ -918,6 +1061,8 @@
 				86C40BB11A8D7C5C00081FAC /* ORKScaleValueLabel.m */,
 				86C40BAC1A8D7C5C00081FAC /* ORKScaleRangeLabel.h */,
 				86C40BAD1A8D7C5C00081FAC /* ORKScaleRangeLabel.m */,
+				B8760F291AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.h */,
+				B8760F2A1AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.m */,
 				86C40BC01A8D7C5C00081FAC /* ORKSubheadlineLabel.h */,
 				86C40BC11A8D7C5C00081FAC /* ORKSubheadlineLabel.m */,
 				86C40BD31A8D7C5C00081FAC /* ORKTapCountLabel.h */,
@@ -939,8 +1084,6 @@
 		B12EFF321AB2106F00A80147 /* UIKitCategories */ = {
 			isa = PBXGroup;
 			children = (
-				86C40BE51A8D7C5C00081FAC /* UIApplication+ResearchKit.h */,
-				86C40BE61A8D7C5C00081FAC /* UIApplication+ResearchKit.m */,
 				86C40BE71A8D7C5C00081FAC /* UIBarButtonItem+ORKBarButtonItem.h */,
 				86C40BE81A8D7C5C00081FAC /* UIBarButtonItem+ORKBarButtonItem.m */,
 				86C40BE91A8D7C5C00081FAC /* UIResponder+ResearchKit.h */,
@@ -952,9 +1095,12 @@
 		B12EFF331AB2110300A80147 /* Task */ = {
 			isa = PBXGroup;
 			children = (
+				BC13CE371B0660220044153C /* ORKNavigableOrderedTask.h */,
+				BC13CE381B0660220044153C /* ORKNavigableOrderedTask.m */,
 				86C40BD51A8D7C5C00081FAC /* ORKTask.h */,
 				86C40B9D1A8D7C5C00081FAC /* ORKOrderedTask.h */,
 				86C40B9E1A8D7C5C00081FAC /* ORKOrderedTask.m */,
+				BC13CE3D1B0662A80044153C /* ORKOrderedTask_Internal.h */,
 				86C40BD71A8D7C5C00081FAC /* ORKTaskViewController.h */,
 				86C40BD81A8D7C5C00081FAC /* ORKTaskViewController.m */,
 				86C40BD91A8D7C5C00081FAC /* ORKTaskViewController_Internal.h */,
@@ -972,12 +1118,17 @@
 				86C40BBC1A8D7C5C00081FAC /* ORKStepViewController.h */,
 				86C40BBD1A8D7C5C00081FAC /* ORKStepViewController.m */,
 				86C40BBE1A8D7C5C00081FAC /* ORKStepViewController_Internal.h */,
+				BCA5C0331AEC05F20092AC8D /* ORKStepNavigationRule.h */,
+				BCA5C0341AEC05F20092AC8D /* ORKStepNavigationRule.m */,
+				BC13CE3B1B0662990044153C /* ORKStepNavigationRule_Private.h */,
+				BC13CE411B066A990044153C /* ORKStepNavigationRule_Internal.h */,
 				86C40B771A8D7C5C00081FAC /* ORKCustomStepView.h */,
 				86C40B781A8D7C5C00081FAC /* ORKCustomStepView.m */,
 				86C40B791A8D7C5C00081FAC /* ORKCustomStepView_Internal.h */,
 				B12EFF351AB2116400A80147 /* Instruction Step */,
 				B12EFF361AB2117B00A80147 /* Question Step */,
 				B12EFF3C1AB211FB00A80147 /* Form Step */,
+				D44239761AF17EE700559D96 /* Image Capture Step */,
 			);
 			name = Step;
 			sourceTree = "<group>";
@@ -1016,6 +1167,8 @@
 				86C40BA71A8D7C5C00081FAC /* ORKResult.h */,
 				86C40BA81A8D7C5C00081FAC /* ORKResult.m */,
 				86C40BA91A8D7C5C00081FAC /* ORKResult_Private.h */,
+				BC13CE3F1B0666FD0044153C /* ORKResultPredicate.h */,
+				BCFF24BC1B0798D10044EC35 /* ORKResultPredicate.m */,
 			);
 			name = Result;
 			sourceTree = "<group>";
@@ -1178,8 +1331,6 @@
 				86C40BFF1A8D7C5C00081FAC /* ORKConsentSection.h */,
 				86C40C001A8D7C5C00081FAC /* ORKConsentSection.m */,
 				86C40C011A8D7C5C00081FAC /* ORKConsentSection_Internal.h */,
-				86C40BFD1A8D7C5C00081FAC /* ORKConsentSection+AssetLoading.h */,
-				86C40BFE1A8D7C5C00081FAC /* ORKConsentSection+AssetLoading.m */,
 				86C40C021A8D7C5C00081FAC /* ORKConsentSignature.h */,
 				86C40C031A8D7C5C00081FAC /* ORKConsentSignature.m */,
 			);
@@ -1261,6 +1412,7 @@
 				86C40C0E1A8D7C5C00081FAC /* ORKVisualConsentTransitionAnimator.h */,
 				86C40C0F1A8D7C5C00081FAC /* ORKVisualConsentTransitionAnimator.m */,
 				B12EFF441AB214B400A80147 /* Tinted Animations */,
+				BCFB2EAF1AE70E4E0070B5D0 /* ORKConsentSceneViewController_Internal.h */,
 			);
 			name = "Consent Views";
 			sourceTree = "<group>";
@@ -1496,6 +1648,7 @@
 			children = (
 				86C40B4D1A8D7C5B00081FAC /* ORKVoiceEngine.h */,
 				86C40B4E1A8D7C5B00081FAC /* ORKVoiceEngine.m */,
+				2EBFE11E1AE1B68800CB8254 /* ORKVoiceEngine_Internal.h */,
 			);
 			name = "Speech Synthesis";
 			sourceTree = "<group>";
@@ -1545,6 +1698,52 @@
 			path = Localized;
 			sourceTree = "<group>";
 		};
+		BC4194261AE8451F00073D6B /* Misc */ = {
+			isa = PBXGroup;
+			children = (
+				BC4194271AE8453A00073D6B /* ORKObserver.h */,
+				BC4194281AE8453A00073D6B /* ORKObserver.m */,
+			);
+			name = Misc;
+			sourceTree = "<group>";
+		};
+		D44239761AF17EE700559D96 /* Image Capture Step */ = {
+			isa = PBXGroup;
+			children = (
+				D44239771AF17F5100559D96 /* ORKImageCaptureStep.h */,
+				D44239781AF17F5100559D96 /* ORKImageCaptureStep.m */,
+				D442397B1AF17F7600559D96 /* ORKImageCaptureStepViewController.h */,
+				D442397C1AF17F7600559D96 /* ORKImageCaptureStepViewController.m */,
+				D45852081AF6CCFA00A2DE13 /* ORKImageCaptureCameraPreviewView.h */,
+				D45852091AF6CCFA00A2DE13 /* ORKImageCaptureCameraPreviewView.m */,
+				D42FEFB61AF7557000A124F8 /* ORKImageCaptureView.h */,
+				D42FEFB71AF7557000A124F8 /* ORKImageCaptureView.m */,
+			);
+			name = "Image Capture Step";
+			sourceTree = "<group>";
+		};
+		FA7A9D2C1B083D90005A2BEA /* Formatters */ = {
+			isa = PBXGroup;
+			children = (
+				FA7A9D2D1B083DD3005A2BEA /* ORKConsentSectionFormatter.h */,
+				FA7A9D2E1B083DD3005A2BEA /* ORKConsentSectionFormatter.m */,
+				FA7A9D311B0843A9005A2BEA /* ORKConsentSignatureFormatter.h */,
+				FA7A9D321B0843A9005A2BEA /* ORKConsentSignatureFormatter.m */,
+			);
+			name = Formatters;
+			sourceTree = "<group>";
+		};
+		FA7A9D351B09362D005A2BEA /* Consent */ = {
+			isa = PBXGroup;
+			children = (
+				86CC8EAA1AC09383001CCD89 /* ORKConsentTests.m */,
+				FA7A9D2A1B082688005A2BEA /* ORKConsentDocumentTests.m */,
+				FA7A9D361B09365F005A2BEA /* ORKConsentSectionFormatterTests.m */,
+				FA7A9D381B0969A7005A2BEA /* ORKConsentSignatureFormatterTests.m */,
+			);
+			name = Consent;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */

 /* Begin PBXHeadersBuildPhase section */
@@ -1552,35 +1751,43 @@
 			isa = PBXHeadersBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				BCA5C0351AEC05F20092AC8D /* ORKStepNavigationRule.h in Headers */,
+				BC13CE391B0660220044153C /* ORKNavigableOrderedTask.h in Headers */,
 				86C40C921A8D7C5C00081FAC /* ORKAudioRecorder.h in Headers */,
 				86C40D8E1A8D7C5C00081FAC /* ORKStep.h in Headers */,
 				618DA04E1A93D0D600E63AA8 /* ORKAccessibility.h in Headers */,
 				86B781BB1AA668ED00688151 /* ORKTimeIntervalPicker.h in Headers */,
 				86C40C6A1A8D7C5C00081FAC /* CMDeviceMotion+ORKJSONDictionary.h in Headers */,
 				86C40CE41A8D7C5C00081FAC /* ORKAnswerFormat.h in Headers */,
+				25ECC0951AFBD68300F3D63B /* ORKReactionTimeStep.h in Headers */,
 				86C40D0A1A8D7C5C00081FAC /* ORKCustomStepView.h in Headers */,
 				86C40DCE1A8D7C5C00081FAC /* ORKTaskViewController_Internal.h in Headers */,
+				25ECC09F1AFBD92D00F3D63B /* ORKReactionTimeContentView.h in Headers */,
 				86C40C361A8D7C5C00081FAC /* ORKSpatialSpanGame.h in Headers */,
 				86C40CAC1A8D7C5C00081FAC /* ORKRecorder.h in Headers */,
 				865EA1681ABA1AA10037C68E /* ORKPicker.h in Headers */,
 				86C40CC81A8D7C5C00081FAC /* ORKFormItemCell.h in Headers */,
 				86C40DF21A8D7C5C00081FAC /* ORKConsentReviewController.h in Headers */,
 				86C40C961A8D7C5C00081FAC /* ORKDataLogger.h in Headers */,
+				BC13CE421B066A990044153C /* ORKStepNavigationRule_Internal.h in Headers */,
 				86C40D781A8D7C5C00081FAC /* ORKScaleSlider.h in Headers */,
 				86C40D241A8D7C5C00081FAC /* ORKFormStepViewController.h in Headers */,
 				86C40D6A1A8D7C5C00081FAC /* ORKResult.h in Headers */,
 				86C40DD61A8D7C5C00081FAC /* ORKUnitLabel.h in Headers */,
 				86C40D9C1A8D7C5C00081FAC /* ORKSubheadlineLabel.h in Headers */,
+				147503BB1AEE807C004B17F3 /* ORKToneAudiometryStepViewController.h in Headers */,
 				86C40D441A8D7C5C00081FAC /* ORKInstructionStepViewController.h in Headers */,
 				86C40D841A8D7C5C00081FAC /* ORKSelectionTitleLabel.h in Headers */,
-				86C40E141A8D7C5C00081FAC /* ORKConsentSection+AssetLoading.h in Headers */,
+				BC13CE3C1B0662990044153C /* ORKStepNavigationRule_Private.h in Headers */,
 				86C40D3C1A8D7C5C00081FAC /* ORKImageChoiceLabel.h in Headers */,
+				BC4194291AE8453A00073D6B /* ORKObserver.h in Headers */,
 				86C40C661A8D7C5C00081FAC /* CMAccelerometerData+ORKJSONDictionary.h in Headers */,
-				86C40DE61A8D7C5C00081FAC /* UIApplication+ResearchKit.h in Headers */,
+				25ECC0A31AFBDD2700F3D63B /* ORKReactionTimeStimulusView.h in Headers */,
 				86C40D701A8D7C5C00081FAC /* ORKRoundTappingButton.h in Headers */,
 				865EA1621AB8DF750037C68E /* ORKDateTimePicker.h in Headers */,
 				86C40DA01A8D7C5C00081FAC /* ORKSurveyAnswerCell.h in Headers */,
 				86C40D941A8D7C5C00081FAC /* ORKStepViewController.h in Headers */,
+				B8760F2B1AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.h in Headers */,
 				86C40C221A8D7C5C00081FAC /* ORKCountdownStep.h in Headers */,
 				86C40DB61A8D7C5C00081FAC /* ORKSurveyAnswerCellForText.h in Headers */,
 				86C40E281A8D7C5C00081FAC /* ORKSignatureView.h in Headers */,
@@ -1593,14 +1800,17 @@
 				86C40D201A8D7C5C00081FAC /* ORKFormStep.h in Headers */,
 				86C40C761A8D7C5C00081FAC /* HKSample+ORKJSONDictionary.h in Headers */,
 				86C40CEA1A8D7C5C00081FAC /* ORKAnswerTextField.h in Headers */,
+				B12EA0191B0D76AD00F9F554 /* ORKToneAudiometryPracticeStepViewController.h in Headers */,
 				B183A4A21A8535D100C76870 /* ResearchKit_Private.h in Headers */,
 				86C40CE81A8D7C5C00081FAC /* ORKAnswerFormat_Internal.h in Headers */,
 				86C40D021A8D7C5C00081FAC /* ORKContinueButton.h in Headers */,
 				86C40D681A8D7C5C00081FAC /* ORKQuestionStepViewController_Private.h in Headers */,
 				86C40D121A8D7C5C00081FAC /* ORKDefines.h in Headers */,
 				86C40D401A8D7C5C00081FAC /* ORKInstructionStep.h in Headers */,
+				147503B71AEE807C004B17F3 /* ORKToneAudiometryContentView.h in Headers */,
 				86C40D981A8D7C5C00081FAC /* ORKStepViewController_Internal.h in Headers */,
 				86B89ABB1AB3BECC001626A4 /* ORKStepHeaderView.h in Headers */,
+				D42FEFB81AF7557000A124F8 /* ORKImageCaptureView.h in Headers */,
 				86C40D1A1A8D7C5C00081FAC /* ORKFormItem_Internal.h in Headers */,
 				86C40E1C1A8D7C5C00081FAC /* ORKConsentSection_Internal.h in Headers */,
 				86C40C7A1A8D7C5C00081FAC /* ORKAccelerometerRecorder.h in Headers */,
@@ -1631,10 +1841,12 @@
 				86C40D7C1A8D7C5C00081FAC /* ORKScaleValueLabel.h in Headers */,
 				86C40E2C1A8D7C5C00081FAC /* ORKVisualConsentStep.h in Headers */,
 				86C40CB81A8D7C5C00081FAC /* ORKVoiceEngine.h in Headers */,
+				FA7A9D331B0843A9005A2BEA /* ORKConsentSignatureFormatter.h in Headers */,
 				86C40C5A1A8D7C5C00081FAC /* ORKWalkingTaskStep.h in Headers */,
 				86C40E361A8D7C5C00081FAC /* ORKVisualConsentTransitionAnimator.h in Headers */,
 				86AD910D1AB7AE4100361FEB /* ORKNavigationContainerView_Internal.h in Headers */,
 				86C40CEE1A8D7C5C00081FAC /* ORKAnswerTextView.h in Headers */,
+				B12EA0151B0D73A500F9F554 /* ORKToneAudiometryPracticeStep.h in Headers */,
 				86C40C421A8D7C5C00081FAC /* ORKSpatialSpanMemoryStep.h in Headers */,
 				86C40C6E1A8D7C5C00081FAC /* CMMotionActivity+ORKJSONDictionary.h in Headers */,
 				B11C54991A9EEF8800265E61 /* ORKConsentSharingStep.h in Headers */,
@@ -1643,11 +1855,15 @@
 				86C40C841A8D7C5C00081FAC /* ORKActiveStepTimer.h in Headers */,
 				86B781BD1AA668ED00688151 /* ORKValuePicker.h in Headers */,
 				86C40DE21A8D7C5C00081FAC /* ORKVerticalContainerView_Internal.h in Headers */,
+				BC01B0FB1B0EB99700863803 /* ORKTintedImageView_Internal.h in Headers */,
 				86B89ABE1AB3BFDB001626A4 /* ORKStepHeaderView_Internal.h in Headers */,
 				86C40C1E1A8D7C5C00081FAC /* ORKAudioStepViewController.h in Headers */,
+				147503AF1AEE8071004B17F3 /* ORKAudioGenerator.h in Headers */,
 				86AD91141AB7B97E00361FEB /* ORKQuestionStepView.h in Headers */,
 				86C40C621A8D7C5C00081FAC /* CLLocation+ORKJSONDictionary.h in Headers */,
 				86C40D801A8D7C5C00081FAC /* ORKSelectionSubTitleLabel.h in Headers */,
+				D458520A1AF6CCFA00A2DE13 /* ORKImageCaptureCameraPreviewView.h in Headers */,
+				D44239791AF17F5100559D96 /* ORKImageCaptureStep.h in Headers */,
 				86C40CB21A8D7C5C00081FAC /* ORKRecorder_Private.h in Headers */,
 				86C40C881A8D7C5C00081FAC /* ORKActiveStepTimerView.h in Headers */,
 				86C40C161A8D7C5C00081FAC /* ORKAudioContentView.h in Headers */,
@@ -1656,6 +1872,7 @@
 				86C40CF61A8D7C5C00081FAC /* ORKBorderedButton.h in Headers */,
 				86C40D4A1A8D7C5C00081FAC /* ORKLabel.h in Headers */,
 				861D11A91AA691BB003C98A7 /* ORKScaleSliderView.h in Headers */,
+				BC13CE3E1B0662A80044153C /* ORKOrderedTask_Internal.h in Headers */,
 				86C40C3E1A8D7C5C00081FAC /* ORKSpatialSpanMemoryContentView.h in Headers */,
 				86C40CC01A8D7C5C00081FAC /* ORKCompletionStep.h in Headers */,
 				86C40DF61A8D7C5C00081FAC /* ORKConsentSignatureController.h in Headers */,
@@ -1663,6 +1880,7 @@
 				86C40D281A8D7C5C00081FAC /* ORKFormTextView.h in Headers */,
 				86C40DEE1A8D7C5C00081FAC /* UIResponder+ResearchKit.h in Headers */,
 				86C40E041A8D7C5C00081FAC /* ORKConsentLearnMoreViewController.h in Headers */,
+				25ECC09B1AFBD8B300F3D63B /* ORKReactionTimeViewController.h in Headers */,
 				86C40D061A8D7C5C00081FAC /* ORKCountdownLabel.h in Headers */,
 				86C40C2A1A8D7C5C00081FAC /* ORKFitnessContentView.h in Headers */,
 				86C40DC21A8D7C5C00081FAC /* ORKTapCountLabel.h in Headers */,
@@ -1675,11 +1893,13 @@
 				86C40C821A8D7C5C00081FAC /* ORKActiveStep_Internal.h in Headers */,
 				86C40D481A8D7C5C00081FAC /* ORKInstructionStepViewController_Internal.h in Headers */,
 				86C40D341A8D7C5C00081FAC /* ORKHelpers.h in Headers */,
+				FA7A9D2F1B083DD3005A2BEA /* ORKConsentSectionFormatter.h in Headers */,
 				86C40E341A8D7C5C00081FAC /* ORKVisualConsentStepViewController_Internal.h in Headers */,
 				86C40D381A8D7C5C00081FAC /* ORKHTMLPDFWriter.h in Headers */,
 				86C40D561A8D7C5C00081FAC /* ORKOrderedTask.h in Headers */,
 				86C40C4E1A8D7C5C00081FAC /* ORKTappingContentView.h in Headers */,
 				86C40CA01A8D7C5C00081FAC /* ORKHealthQuantityTypeRecorder.h in Headers */,
+				BC13CE401B0666FD0044153C /* ORKResultPredicate.h in Headers */,
 				86C40CFA1A8D7C5C00081FAC /* ORKCaption1Label.h in Headers */,
 				86C40E081A8D7C5C00081FAC /* ORKConsentReviewStep.h in Headers */,
 				86C40C901A8D7C5C00081FAC /* ORKActiveStepViewController_Internal.h in Headers */,
@@ -1704,12 +1924,14 @@
 				86C40D6E1A8D7C5C00081FAC /* ORKResult_Private.h in Headers */,
 				86C40D161A8D7C5C00081FAC /* ORKErrors.h in Headers */,
 				861D11B51AA7D073003C98A7 /* ORKTextChoiceCellGroup.h in Headers */,
+				147503B91AEE807C004B17F3 /* ORKToneAudiometryStep.h in Headers */,
 				86C40C9A1A8D7C5C00081FAC /* ORKDataLogger_Private.h in Headers */,
 				861D11AD1AA7951F003C98A7 /* ORKChoiceAnswerFormatHelper.h in Headers */,
 				86C40C461A8D7C5C00081FAC /* ORKSpatialSpanMemoryStepViewController.h in Headers */,
 				86C40C521A8D7C5C00081FAC /* ORKTappingIntervalStep.h in Headers */,
 				86C40D8A1A8D7C5C00081FAC /* ORKSkin.h in Headers */,
 				86C40DFE1A8D7C5C00081FAC /* ORKConsentDocument.h in Headers */,
+				D442397D1AF17F7600559D96 /* ORKImageCaptureStepViewController.h in Headers */,
 				86C40C4A1A8D7C5C00081FAC /* ORKSpatialSpanTargetView.h in Headers */,
 				86C40C1A1A8D7C5C00081FAC /* ORKAudioStep.h in Headers */,
 			);
@@ -1900,7 +2122,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "if [ ! -x /usr/local/bin/appledoc ]; then\n    echo \"error: appledoc is required for building ResearchKit's documentation. See http://appledoc.gentlebytes.com\" 1>&2\n    exit 1\nfi\n\necho \"warning: warnings are a result of https://github.com/tomaz/appledoc/issues/348\"\n\n/usr/local/bin/appledoc --print-settings --publish-docset --install-docset --output \"${BUILT_PRODUCTS_DIR}/docs/\" --include \"docs/ActiveTasks\" --include \"docs/InformedConsent\" --include \"docs/Overview\" --include \"docs/Survey\"  --ignore \"docs/templates\" --templates \"docs/templates\" \"${BUILT_PRODUCTS_DIR}/ResearchKit.framework\" \"docs\"\n\necho \"warning: Opening documentation in browser...\"\nopen \"$HOME/Library/Developer/Shared/Documentation/DocSets/org.researchkit.ResearchKit.docset/Contents/Resources/Documents/index.html\"";
+			shellScript = "if [ ! -x /usr/local/bin/appledoc ]; then\n    echo \"error: appledoc is required for building ResearchKit's documentation. See http://appledoc.gentlebytes.com\" 1>&2\n    exit 1\nfi\n\n/usr/local/bin/appledoc --print-settings --publish-docset --install-docset --output \"${BUILT_PRODUCTS_DIR}/docs/\" --include \"docs/ActiveTasks\" --include \"docs/InformedConsent\" --include \"docs/Overview\" --include \"docs/Survey\"  --ignore \"docs/templates\" --templates \"docs/templates\" \"${BUILT_PRODUCTS_DIR}/ResearchKit.framework\" \"docs\"\n\necho \"note: Opening documentation in browser...\"\nopen \"$HOME/Library/Developer/Shared/Documentation/DocSets/org.researchkit.ResearchKit.docset/Contents/Resources/Documents/index.html\"";
 			showEnvVarsInLog = 0;
 		};
 /* End PBXShellScriptBuildPhase section */
@@ -1912,10 +2134,17 @@
 			files = (
 				86CC8EB71AC09383001CCD89 /* ORKDataLoggerTests.m in Sources */,
 				86CC8EBA1AC09383001CCD89 /* ORKResultTests.m in Sources */,
+				FA7A9D391B0969A7005A2BEA /* ORKConsentSignatureFormatterTests.m in Sources */,
 				86CC8EB81AC09383001CCD89 /* ORKHKSampleTests.m in Sources */,
+				BCB96C131B19C0EC002A0B96 /* ORKStepTests.m in Sources */,
 				86CC8EB51AC09383001CCD89 /* ORKConsentTests.m in Sources */,
+				2EBFE11D1AE1B32D00CB8254 /* ORKUIViewAccessibilityTests.m in Sources */,
 				86CC8EB41AC09383001CCD89 /* ORKChoiceAnswerFormatHelperTests.m in Sources */,
+				2EBFE1201AE1B74100CB8254 /* ORKVoiceEngineTests.m in Sources */,
+				BCAD50E81B0201EE0034806A /* ORKTaskTests.m in Sources */,
 				86CC8EBB1AC09383001CCD89 /* ORKTextChoiceCellGroupTests.m in Sources */,
+				FA7A9D2B1B082688005A2BEA /* ORKConsentDocumentTests.m in Sources */,
+				FA7A9D371B09365F005A2BEA /* ORKConsentSectionFormatterTests.m in Sources */,
 				86D348021AC161B0006DB02B /* ORKRecorderTests.m in Sources */,
 				86CC8EB61AC09383001CCD89 /* ORKDataLoggerManagerTests.m in Sources */,
 				86CC8EB31AC09383001CCD89 /* ORKAccessibilityTests.m in Sources */,
@@ -1930,7 +2159,9 @@
 				86C40E2E1A8D7C5C00081FAC /* ORKVisualConsentStep.m in Sources */,
 				86C40CA61A8D7C5C00081FAC /* ORKLocationRecorder.m in Sources */,
 				86C40CB61A8D7C5C00081FAC /* ORKTouchRecorder.m in Sources */,
+				B12EA0161B0D73A500F9F554 /* ORKToneAudiometryPracticeStep.m in Sources */,
 				86C40DC41A8D7C5C00081FAC /* ORKTapCountLabel.m in Sources */,
+				25ECC0A01AFBD92D00F3D63B /* ORKReactionTimeContentView.m in Sources */,
 				86C40D4C1A8D7C5C00081FAC /* ORKLabel.m in Sources */,
 				86C40C9E1A8D7C5C00081FAC /* ORKDeviceMotionRecorder.m in Sources */,
 				86C40D961A8D7C5C00081FAC /* ORKStepViewController.m in Sources */,
@@ -1942,6 +2173,7 @@
 				86C40C381A8D7C5C00081FAC /* ORKSpatialSpanGame.m in Sources */,
 				86C40C481A8D7C5C00081FAC /* ORKSpatialSpanMemoryStepViewController.m in Sources */,
 				86C40CDA1A8D7C5C00081FAC /* ORKTextFieldView.m in Sources */,
+				B8760F2C1AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.m in Sources */,
 				86C40D821A8D7C5C00081FAC /* ORKSelectionSubTitleLabel.m in Sources */,
 				86C40DCC1A8D7C5C00081FAC /* ORKTaskViewController.m in Sources */,
 				86C40E061A8D7C5C00081FAC /* ORKConsentLearnMoreViewController.m in Sources */,
@@ -1949,9 +2181,12 @@
 				86C40C801A8D7C5C00081FAC /* ORKActiveStep.m in Sources */,
 				86C40D721A8D7C5C00081FAC /* ORKRoundTappingButton.m in Sources */,
 				86C40E2A1A8D7C5C00081FAC /* ORKSignatureView.m in Sources */,
+				BCFF24BD1B0798D10044EC35 /* ORKResultPredicate.m in Sources */,
+				25ECC0A41AFBDD2700F3D63B /* ORKReactionTimeStimulusView.m in Sources */,
 				86C40CBA1A8D7C5C00081FAC /* ORKVoiceEngine.m in Sources */,
 				861D11B61AA7D073003C98A7 /* ORKTextChoiceCellGroup.m in Sources */,
 				86C40CCA1A8D7C5C00081FAC /* ORKFormItemCell.m in Sources */,
+				147503B81AEE807C004B17F3 /* ORKToneAudiometryContentView.m in Sources */,
 				86C40CBE1A8D7C5C00081FAC /* UITouch+ORKJSONDictionary.m in Sources */,
 				618DA0521A93D0D600E63AA8 /* ORKAccessibilityFunctions.m in Sources */,
 				86C40DB81A8D7C5C00081FAC /* ORKSurveyAnswerCellForText.m in Sources */,
@@ -1972,28 +2207,35 @@
 				86C40D001A8D7C5C00081FAC /* ORKChoiceViewCell.m in Sources */,
 				86C40C4C1A8D7C5C00081FAC /* ORKSpatialSpanTargetView.m in Sources */,
 				86C40D9E1A8D7C5C00081FAC /* ORKSubheadlineLabel.m in Sources */,
+				D42FEFB91AF7557000A124F8 /* ORKImageCaptureView.m in Sources */,
 				86C40C401A8D7C5C00081FAC /* ORKSpatialSpanMemoryContentView.m in Sources */,
+				147503BC1AEE807C004B17F3 /* ORKToneAudiometryStepViewController.m in Sources */,
 				86AD910B1AB7AD1E00361FEB /* ORKNavigationContainerView.m in Sources */,
 				865EA1631AB8DF750037C68E /* ORKDateTimePicker.m in Sources */,
 				86C40C781A8D7C5C00081FAC /* HKSample+ORKJSONDictionary.m in Sources */,
 				86C40D421A8D7C5C00081FAC /* ORKInstructionStep.m in Sources */,
 				86C40C2C1A8D7C5C00081FAC /* ORKFitnessContentView.m in Sources */,
+				D458520B1AF6CCFA00A2DE13 /* ORKImageCaptureCameraPreviewView.m in Sources */,
 				86C40E1A1A8D7C5C00081FAC /* ORKConsentSection.m in Sources */,
 				86C40C241A8D7C5C00081FAC /* ORKCountdownStep.m in Sources */,
 				86C40CA21A8D7C5C00081FAC /* ORKHealthQuantityTypeRecorder.m in Sources */,
 				86C40DC01A8D7C5C00081FAC /* ORKTableViewCell.m in Sources */,
+				BC41942A1AE8453A00073D6B /* ORKObserver.m in Sources */,
 				86C40C681A8D7C5C00081FAC /* CMAccelerometerData+ORKJSONDictionary.m in Sources */,
 				86C40C701A8D7C5C00081FAC /* CMMotionActivity+ORKJSONDictionary.m in Sources */,
+				147503B01AEE8071004B17F3 /* ORKAudioGenerator.m in Sources */,
 				86C40D7E1A8D7C5C00081FAC /* ORKScaleValueLabel.m in Sources */,
+				B12EA01A1B0D76AD00F9F554 /* ORKToneAudiometryPracticeStepViewController.m in Sources */,
 				86C40D901A8D7C5C00081FAC /* ORKStep.m in Sources */,
 				86C40D2E1A8D7C5C00081FAC /* ORKHeadlineLabel.m in Sources */,
+				FA7A9D341B0843A9005A2BEA /* ORKConsentSignatureFormatter.m in Sources */,
 				86C40CFC1A8D7C5C00081FAC /* ORKCaption1Label.m in Sources */,
 				86C40E001A8D7C5C00081FAC /* ORKConsentDocument.m in Sources */,
+				D442397A1AF17F5100559D96 /* ORKImageCaptureStep.m in Sources */,
 				86C40CDE1A8D7C5C00081FAC /* ORKTintedImageView.m in Sources */,
 				86B781BC1AA668ED00688151 /* ORKTimeIntervalPicker.m in Sources */,
 				86B781BE1AA668ED00688151 /* ORKValuePicker.m in Sources */,
 				86B89ABC1AB3BECC001626A4 /* ORKStepHeaderView.m in Sources */,
-				86C40DE81A8D7C5C00081FAC /* UIApplication+ResearchKit.m in Sources */,
 				861D11AA1AA691BB003C98A7 /* ORKScaleSliderView.m in Sources */,
 				86C40C141A8D7C5C00081FAC /* ORKActiveStepQuantityView.m in Sources */,
 				86C40C6C1A8D7C5C00081FAC /* CMDeviceMotion+ORKJSONDictionary.m in Sources */,
@@ -2005,18 +2247,21 @@
 				86C40C201A8D7C5C00081FAC /* ORKAudioStepViewController.m in Sources */,
 				86C40D081A8D7C5C00081FAC /* ORKCountdownLabel.m in Sources */,
 				86C40E121A8D7C5C00081FAC /* ORKConsentSceneViewController.m in Sources */,
+				D442397E1AF17F7600559D96 /* ORKImageCaptureStepViewController.m in Sources */,
 				86C40CAE1A8D7C5C00081FAC /* ORKRecorder.m in Sources */,
 				86C40DAC1A8D7C5C00081FAC /* ORKSurveyAnswerCellForNumber.m in Sources */,
 				86C40C541A8D7C5C00081FAC /* ORKTappingIntervalStep.m in Sources */,
 				86C40D6C1A8D7C5C00081FAC /* ORKResult.m in Sources */,
 				86C40CD21A8D7C5C00081FAC /* ORKInstructionStepView.m in Sources */,
 				86C40D181A8D7C5C00081FAC /* ORKErrors.m in Sources */,
+				25ECC09C1AFBD8B300F3D63B /* ORKReactionTimeViewController.m in Sources */,
 				86C40DB01A8D7C5C00081FAC /* ORKSurveyAnswerCellForScale.m in Sources */,
 				86C40C281A8D7C5C00081FAC /* ORKCountdownStepViewController.m in Sources */,
 				86C40C641A8D7C5C00081FAC /* CLLocation+ORKJSONDictionary.m in Sources */,
 				86C40D041A8D7C5C00081FAC /* ORKContinueButton.m in Sources */,
 				86C40DEC1A8D7C5C00081FAC /* UIBarButtonItem+ORKBarButtonItem.m in Sources */,
 				86C40CAA1A8D7C5C00081FAC /* ORKPedometerRecorder.m in Sources */,
+				BCA5C0361AEC05F20092AC8D /* ORKStepNavigationRule.m in Sources */,
 				86C40D761A8D7C5C00081FAC /* ORKScaleRangeLabel.m in Sources */,
 				86C40C741A8D7C5C00081FAC /* CMPedometerData+ORKJSONDictionary.m in Sources */,
 				86AD91151AB7B97E00361FEB /* ORKQuestionStepView.m in Sources */,
@@ -2038,8 +2283,9 @@
 				86C40C8E1A8D7C5C00081FAC /* ORKActiveStepViewController.m in Sources */,
 				B183A5011A8535D100C76870 /* (null) in Sources */,
 				86C40CE61A8D7C5C00081FAC /* ORKAnswerFormat.m in Sources */,
+				25ECC0961AFBD68300F3D63B /* ORKReactionTimeStep.m in Sources */,
+				BC13CE3A1B0660220044153C /* ORKNavigableOrderedTask.m in Sources */,
 				B11C54A11A9EF4A700265E61 /* ORKConsentSharingStepViewController.m in Sources */,
-				86C40E161A8D7C5C00081FAC /* ORKConsentSection+AssetLoading.m in Sources */,
 				86C40DA81A8D7C5C00081FAC /* ORKSurveyAnswerCellForImageSelection.m in Sources */,
 				86C40CCE1A8D7C5C00081FAC /* ORKImageSelectionView.m in Sources */,
 				86C40D461A8D7C5C00081FAC /* ORKInstructionStepViewController.m in Sources */,
@@ -2050,6 +2296,8 @@
 				86C40CC61A8D7C5C00081FAC /* ORKCompletionStepViewController.m in Sources */,
 				86C40D661A8D7C5C00081FAC /* ORKQuestionStepViewController.m in Sources */,
 				86C40DF41A8D7C5C00081FAC /* ORKConsentReviewController.m in Sources */,
+				147503BA1AEE807C004B17F3 /* ORKToneAudiometryStep.m in Sources */,
+				FA7A9D301B083DD3005A2BEA /* ORKConsentSectionFormatter.m in Sources */,
 				86C40D2A1A8D7C5C00081FAC /* ORKFormTextView.m in Sources */,
 				86C40DD41A8D7C5C00081FAC /* ORKTextButton.m in Sources */,
 				86C40C981A8D7C5C00081FAC /* ORKDataLogger.m in Sources */,
@@ -2264,6 +2512,7 @@
 				PRODUCT_NAME = ResearchKit;
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;
+				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
 		};
@@ -2290,6 +2539,7 @@
 				PRODUCT_NAME = ResearchKit;
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;
+				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
 		};
@@ -28,8 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

-// Shared header for accessibility functionality.

+// Shared header for accessibility functionality.
 #import "UIView+ORKAccessibility.h"
 #import "ORKAccessibilityFunctions.h"
-
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKDefines.h"
 #import "ORKHelpers.h"

+
@class ORKScaleSlider;

 // Used to properly format values from the ORKScaleSlider.
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <UIKit/UIKit.h>
 #import "ORKAccessibilityFunctions.h"
 #import "ORKAnswerFormat_Internal.h"
@@ -35,6 +36,7 @@
 #import "ORKScaleSliderView.h"
 #import "UIView+ORKAccessibility.h"

+
 NSString *ORKAccessibilityFormatScaleSliderValue(CGFloat value, ORKScaleSlider *slider) {
    ORKScaleSliderView *sliderView = (ORKScaleSliderView *)[slider ork_superviewOfType:[ORKScaleSliderView class]];
    if (!slider || !sliderView) {
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <UIKit/UIKit.h>
 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

@interface UIView (ORKAccessibility)
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "UIView+ORKAccessibility.h"

+
@implementation UIView (ORKAccessibility)

 - (UIView *)ork_superviewOfType:(Class)aClass {
@@ -40,8 +42,7 @@
    id superview = [self superview];
    if (superview == nil) {
        return nil;
-    }
-    else if ([superview isKindOfClass:aClass]) {
+    } else if ([superview isKindOfClass:aClass]) {
        return superview;
    }
    
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <CoreLocation/CoreLocation.h>
 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

@interface CLLocation (ORKJSONDictionary)
@@ -28,13 +28,14 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "CLLocation+ORKJSONDictionary.h"
 #import "ORKHelpers.h"

+
@implementation CLLocation (ORKJSONDictionary)

- (NSDictionary *)ork_JSONDictionary
-{
+- (NSDictionary *)ork_JSONDictionary {
    CLLocationCoordinate2D coord = self.coordinate;
    CLLocationDistance altitude = self.altitude;
    CLLocationAccuracy horizAccuracy = self.horizontalAccuracy;
@@ -44,32 +45,27 @@
    NSDate *timestamp = self.timestamp;
    CLFloor *floor = self.floor;
    
-    NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithObject:ORKStringFromDateISO8601(timestamp) forKey:@"timestamp"];
+    NSMutableDictionary *dictionary = [@{@"timestamp" : ORKStringFromDateISO8601(timestamp)} mutableCopy];
    
-    if (horizAccuracy >= 0)
-    {
-        dict[@"coordinate"] = @{ @"latitude" : [NSDecimalNumber numberWithDouble:coord.latitude], @"longitude" : [NSDecimalNumber numberWithDouble:coord.longitude]};
-        dict[@"horizontalAccuracy"] = [NSDecimalNumber numberWithDouble:horizAccuracy];
+    if (horizAccuracy >= 0) {
+        dictionary[@"coordinate"] = @{ @"latitude" : [NSDecimalNumber numberWithDouble:coord.latitude], @"longitude" : [NSDecimalNumber numberWithDouble:coord.longitude]};
+        dictionary[@"horizontalAccuracy"] = [NSDecimalNumber numberWithDouble:horizAccuracy];
    }
-    if (vertAccuracy >= 0)
-    {
-        dict[@"altitude"] = [NSDecimalNumber numberWithDouble:altitude];
-        dict[@"verticalAccuracy"] = [NSDecimalNumber numberWithDouble:vertAccuracy];
+    if (vertAccuracy >= 0) {
+        dictionary[@"altitude"] = [NSDecimalNumber numberWithDouble:altitude];
+        dictionary[@"verticalAccuracy"] = [NSDecimalNumber numberWithDouble:vertAccuracy];
    }
-    if (course >= 0)
-    {
-        dict[@"course"] = [NSDecimalNumber numberWithDouble:course];
+    if (course >= 0) {
+        dictionary[@"course"] = [NSDecimalNumber numberWithDouble:course];
    }
-    if (speed >= 0)
-    {
-        dict[@"speed"] = [NSDecimalNumber numberWithDouble:speed];
+    if (speed >= 0) {
+        dictionary[@"speed"] = [NSDecimalNumber numberWithDouble:speed];
    }
-    if (floor)
-    {
-        dict[@"floor"] = @(floor.level);
+    if (floor) {
+        dictionary[@"floor"] = @(floor.level);
    }

-    return dict;
+    return dictionary;
 }

@end
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <CoreMotion/CoreMotion.h>
 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

@interface CMAccelerometerData (ORKJSONDictionary)
@@ -31,16 +31,16 @@

 #import "CMAccelerometerData+ORKJSONDictionary.h"

+
@implementation CMAccelerometerData (ORKJSONDictionary)

- (NSDictionary *)ork_JSONDictionary
-{
-    NSDictionary *dict = @{@"timestamp": [NSDecimalNumber numberWithDouble:self.timestamp],
-                           @"x" : [NSDecimalNumber numberWithDouble:self.acceleration.x],
-                           @"y" : [NSDecimalNumber numberWithDouble:self.acceleration.y],
-                           @"z" : [NSDecimalNumber numberWithDouble:self.acceleration.z]
-                           };
-    return dict;
+- (NSDictionary *)ork_JSONDictionary {
+    NSDictionary *dictionary = @{@"timestamp": [NSDecimalNumber numberWithDouble:self.timestamp],
+                                 @"x" : [NSDecimalNumber numberWithDouble:self.acceleration.x],
+                                 @"y" : [NSDecimalNumber numberWithDouble:self.acceleration.y],
+                                 @"z" : [NSDecimalNumber numberWithDouble:self.acceleration.z]
+                                 };
+    return dictionary;
 }

@end
@@ -32,6 +32,7 @@
 #import <CoreMotion/CoreMotion.h>
 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

@interface CMDeviceMotion (ORKJSONDictionary)
@@ -31,17 +31,17 @@

 #import "CMDeviceMotion+ORKJSONDictionary.h"

+
@implementation CMDeviceMotion (ORKJSONDictionary)

- (NSDictionary *)ork_JSONDictionary
-{
+- (NSDictionary *)ork_JSONDictionary {
    CMQuaternion attitude = self.attitude.quaternion;
    CMRotationRate rotationRate = self.rotationRate;
    CMAcceleration gravity = self.gravity;
    CMAcceleration userAccel = self.userAcceleration;
    CMCalibratedMagneticField field = self.magneticField;
    
-    NSDictionary *dict = @{@"timestamp": [NSDecimalNumber numberWithDouble:self.timestamp],
+    NSDictionary *dictionary = @{@"timestamp": [NSDecimalNumber numberWithDouble:self.timestamp],
                           @"attitude" : @{
                                   @"x" : [NSDecimalNumber numberWithDouble:attitude.x],
                                   @"y" : [NSDecimalNumber numberWithDouble:attitude.y],
@@ -70,7 +70,7 @@
                                   @"accuracy" : [NSDecimalNumber numberWithDouble:field.accuracy]
                                   }
                           };
-    return dict;
+    return dictionary;
 }

@end
@@ -32,6 +32,7 @@
 #import <CoreMotion/CoreMotion.h>
 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

@interface CMMotionActivity (ORKJSONDictionary)
@@ -32,57 +32,49 @@
 #import "CMMotionActivity+ORKJSONDictionary.h"
 #import "ORKHelpers.h"

-static NSString * const kActivityUnknown = @"unknown";
-static NSString * const kActivityStationary = @"stationary";
-static NSString * const kActivityWalking = @"walking";
-static NSString * const kActivityRunning = @"running";
-static NSString * const kActivityAutomotive = @"automotive";
-static NSString * const kStartDateKey = @"startDate";
-static NSString * const kEndDateKey = @"endDate";

-static NSString *stringFromActivityConfidence(CMMotionActivityConfidence confidence)
-{
+static NSString *const kActivityUnknown = @"unknown";
+static NSString *const kActivityStationary = @"stationary";
+static NSString *const kActivityWalking = @"walking";
+static NSString *const kActivityRunning = @"running";
+static NSString *const kActivityAutomotive = @"automotive";
+static NSString *const kStartDateKey = @"startDate";
+static NSString *const kEndDateKey = @"endDate";
+
+static NSString *stringFromActivityConfidence(CMMotionActivityConfidence confidence) {
    NSDictionary *confidences = @{@(CMMotionActivityConfidenceHigh) : @"high",
                                  @(CMMotionActivityConfidenceMedium) : @"medium",
                                  @(CMMotionActivityConfidenceLow) : @"low"};
    return confidences[@(confidence)];
 }

-static NSArray *activityArray(CMMotionActivity *activity)
-{
-    NSMutableArray *ret = [NSMutableArray array];
-    if (activity.unknown)
-    {
-        [ret addObject:kActivityUnknown];
+static NSArray *activityArray(CMMotionActivity *activity) {
+    NSMutableArray *array = [NSMutableArray array];
+    if (activity.unknown) {
+        [array addObject:kActivityUnknown];
    }
-    if (activity.stationary)
-    {
-        [ret addObject:kActivityStationary];
+    if (activity.stationary) {
+        [array addObject:kActivityStationary];
    }
-    if (activity.walking)
-    {
-        [ret addObject:kActivityWalking];
+    if (activity.walking) {
+        [array addObject:kActivityWalking];
    }
-    if (activity.running)
-    {
-        [ret addObject:kActivityRunning];
+    if (activity.running) {
+        [array addObject:kActivityRunning];
    }
-    if (activity.automotive)
-    {
-        [ret addObject:kActivityAutomotive];
+    if (activity.automotive) {
+        [array addObject:kActivityAutomotive];
    }
-    return ret;
+    return array;
 }

-    
-static NSString * const kActivityKey = @"activity";
+static NSString *const kActivityKey = @"activity";

-static NSString * const kConfidenceKey = @"confidence";
+static NSString *const kConfidenceKey = @"confidence";

@implementation CMMotionActivity (ORKJSONDictionary)

- (NSDictionary *)ork_JSONDictionary
-{
+- (NSDictionary *)ork_JSONDictionary {
    return @{kConfidenceKey : stringFromActivityConfidence(self.confidence),
             kActivityKey : activityArray(self),
             kStartDateKey : ORKStringFromDateISO8601(self.startDate)};
@@ -32,13 +32,13 @@
 #import <CoreMotion/CoreMotion.h>
 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

@interface CMPedometerData (ORKJSONDictionary)

 - (NSDictionary *)ork_JSONDictionary;

-
@end

 NS_ASSUME_NONNULL_END
@@ -33,18 +33,17 @@
 #import "ORKHelpers.h"
 #import <CoreMotion/CoreMotion.h>

+
@implementation CMPedometerData (ORKJSONDictionary)

- (NSDictionary *)ork_JSONDictionary
-{
-    NSMutableDictionary *dict = [@{@"startDate": ORKStringFromDateISO8601(self.startDate),
-                                   @"endDate": ORKStringFromDateISO8601(self.endDate)
-                                   } mutableCopy];
-    for (NSString *key in @[@"numberOfSteps", @"distance", @"floorsAscended", @"floorsDescended"])
-    {
-        [dict setValue:[self valueForKey:key] forKey:key];
+- (NSDictionary *)ork_JSONDictionary {
+    NSMutableDictionary *dictionary = [@{@"startDate": ORKStringFromDateISO8601(self.startDate),
+                                         @"endDate": ORKStringFromDateISO8601(self.endDate)
+                                         } mutableCopy];
+    for (NSString *key in @[@"numberOfSteps", @"distance", @"floorsAscended", @"floorsDescended"]) {
+        [dictionary setValue:[self valueForKey:key] forKey:key];
    }
-    return dict;
+    return dictionary;
 }

@end
@@ -32,6 +32,7 @@
 #import <HealthKit/HealthKit.h>
 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

 typedef NS_OPTIONS(NSInteger, ORKSampleJSONOptions) {
@@ -41,8 +42,7 @@ typedef NS_OPTIONS(NSInteger, ORKSampleJSONOptions) {
 };

 /**
- * JSON serialization aid for HKSample.
- *
+ JSON serialization aid for HKSample.
 */
@interface HKSample (ORKJSONDictionary)

@@ -52,8 +52,7 @@ typedef NS_OPTIONS(NSInteger, ORKSampleJSONOptions) {


 /**
- * JSON serialization aid for HKCorrelation.
- *
+ JSON serialization aid for HKCorrelation.
 */
@interface HKCorrelation (ORKJSONDictionary)

@@ -32,6 +32,7 @@
 #import "HKSample+ORKJSONDictionary.h"
 #import "ORKHelpers.h"

+
 static NSString *const kHKSampleIdentifierKey = @"type"; // For compatibility with Health XML export
 static NSString *const kHKUUIDKey = @"uuid";
 static NSString *const kHKSampleStartDateKey = @"startDate";
@@ -43,108 +44,102 @@ static NSString *const kHKUnitKey = @"unit";
 static NSString *const kHKCorrelatedObjectsKey = @"objects";
 // static NSString *const kHKSourceIdentifierKey = @"sourceBundleIdentifier";

-@interface HKCategorySample (ORKJSONDictionary)
-
-@end
-
-@interface HKQuantitySample (ORKJSONDictionary)
-
-@end
-

@implementation HKSample (ORKJSONDictionary)

- (NSDictionary *)ork_JSONDictionaryWithOptions:(ORKSampleJSONOptions)options unit:(HKUnit *)unit
-{
-    NSMutableDictionary *mdict = [NSMutableDictionary dictionaryWithCapacity:12];
+- (NSMutableDictionary *)ork_JSONMutableDictionaryWithOptions:(ORKSampleJSONOptions)options unit:(HKUnit *)unit {
+    NSMutableDictionary *mutableDictionary = [NSMutableDictionary dictionaryWithCapacity:12];
    
    // Type identification
    HKSampleType *sampleType = [self sampleType];
-    mdict[kHKSampleIdentifierKey] = [sampleType identifier];
+    mutableDictionary[kHKSampleIdentifierKey] = [sampleType identifier];
    
    // consider adding @"class" : NSStringFromClass(sampleType) ?
    
    // Start and end dates
    NSDate *startDate = [self startDate];
-    if (startDate)
-    {
-        mdict[kHKSampleStartDateKey] = ORKStringFromDateISO8601(startDate);
+    if (startDate) {
+        mutableDictionary[kHKSampleStartDateKey] = ORKStringFromDateISO8601(startDate);
    }
    
    NSDate *endDate = [self endDate];
-    if (endDate)
-    {
-        mdict[kHKSampleEndDateKey] = ORKStringFromDateISO8601(endDate);
+    if (endDate) {
+        mutableDictionary[kHKSampleEndDateKey] = ORKStringFromDateISO8601(endDate);
    }
-    if (unit)
-    {
-        mdict[kHKUnitKey] = [unit unitString];
+    if (unit) {
+        mutableDictionary[kHKUnitKey] = [unit unitString];
    }
-    if ((options & ORKSampleIncludeUUID))
-    {
+    if ((options & ORKSampleIncludeUUID)) {
        NSUUID *uuid = [self UUID];
-        if (uuid)
-        {
-            mdict[kHKUUIDKey] = [uuid UUIDString];
+        if (uuid) {
+            mutableDictionary[kHKUUIDKey] = [uuid UUIDString];
        }
    }
    
-    if ( (options & ORKSampleIncludeMetadata) && [self.metadata count] > 0)
-    {
+    if ( (options & ORKSampleIncludeMetadata) && [self.metadata count] > 0) {
        NSMutableDictionary *metadata = [self.metadata mutableCopy];
-        for (NSString *k in metadata)
-        {
+        for (NSString *k in metadata) {
            id obj = metadata[k];
-            if ([obj isKindOfClass:[NSDate class]])
-            {
+            if ([obj isKindOfClass:[NSDate class]]) {
                metadata[k] = ORKStringFromDateISO8601(obj);
            }
        }
        
-        mdict[kHKMetadataKey] = metadata;
+        mutableDictionary[kHKMetadataKey] = metadata;
    }
    
-    if (options & ORKSampleIncludeSource)
-    {
+    if (options & ORKSampleIncludeSource) {
        HKSource *source = [self source];
-        if (source.name)
-        {
-            mdict[kHKSourceKey] = source.name;
+        if (source.name) {
+            mutableDictionary[kHKSourceKey] = source.name;
        }
    }
        
-    return mdict;
+    return mutableDictionary;
 }

+- (NSDictionary *)ork_JSONDictionaryWithOptions:(ORKSampleJSONOptions)options unit:(HKUnit *)unit {
+    return [self ork_JSONMutableDictionaryWithOptions:options unit:unit];
+}
+
+@end
+
+
+@interface HKCategorySample (ORKJSONDictionary)
+
@end


@implementation HKCategorySample (ORKJSONDictionary)

- (NSDictionary *)ork_JSONDictionaryWithOptions:(ORKSampleJSONOptions)options unit:(HKUnit *)unit
-{
-    NSMutableDictionary *dict = [[super ork_JSONDictionaryWithOptions:options unit:unit] mutableCopy];
+- (NSDictionary *)ork_JSONDictionaryWithOptions:(ORKSampleJSONOptions)options unit:(HKUnit *)unit {
+    NSMutableDictionary *dictionary = [self ork_JSONMutableDictionaryWithOptions:options unit:unit];
    
    NSInteger value = [self value];
-    dict[kHKSampleValue] = @(value);
+    dictionary[kHKSampleValue] = @(value);
    
-    return dict;
+    return dictionary;
 }

@end

+
+@interface HKQuantitySample (ORKJSONDictionary)
+
+@end
+
+
@implementation HKQuantitySample (ORKJSONDictionary)

- (NSDictionary *)ork_JSONDictionaryWithOptions:(ORKSampleJSONOptions)options unit:(HKUnit *)unit
-{
-    NSMutableDictionary *dict = [[super ork_JSONDictionaryWithOptions:options unit:unit] mutableCopy];
+- (NSDictionary *)ork_JSONDictionaryWithOptions:(ORKSampleJSONOptions)options unit:(HKUnit *)unit {
+    NSMutableDictionary *dictionary = [self ork_JSONMutableDictionaryWithOptions:options unit:unit];
    
    HKQuantity *quantity = [self quantity];
    double value = [quantity doubleValueForUnit:unit];
-    dict[kHKSampleValue] = @(value);
+    dictionary[kHKSampleValue] = @(value);
    
    
-    return dict;
+    return dictionary;
 }

@end
@@ -152,29 +147,22 @@ static NSString *const kHKCorrelatedObjectsKey = @"objects";

@implementation HKCorrelation (ORKJSONDictionary)

-
- (NSDictionary *)ork_JSONDictionaryWithOptions:(ORKSampleJSONOptions)options sampleTypes:(NSArray *)sampleTypes units:(NSArray *)units
-{
-    NSMutableDictionary *mdict = (NSMutableDictionary *)[self ork_JSONDictionaryWithOptions:options unit:nil];
+- (NSDictionary *)ork_JSONDictionaryWithOptions:(ORKSampleJSONOptions)options sampleTypes:(NSArray *)sampleTypes units:(NSArray *)units {
+    NSMutableDictionary *mutableDictionary = [self ork_JSONMutableDictionaryWithOptions:options unit:nil];
    
    // The correlated objects
    NSMutableArray *correlatedObjects = [NSMutableArray arrayWithCapacity:[sampleTypes count]];
-    for (HKSample *sample in self.objects)
-    {
+    for (HKSample *sample in self.objects) {
        NSUInteger idx = [sampleTypes indexOfObject:sample.sampleType];
-        if (idx == NSNotFound)
-        {
+        if (idx == NSNotFound) {
            continue;
        }
        
        [correlatedObjects addObject:[sample ork_JSONDictionaryWithOptions:options unit:units[idx]]];
    }
-    mdict[kHKCorrelatedObjectsKey] = correlatedObjects;
+    mutableDictionary[kHKCorrelatedObjectsKey] = correlatedObjects;
    
-    
-    return mdict;
+    return mutableDictionary;
 }

-
-
@end
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ORKRecorder.h>

+
 NS_ASSUME_NONNULL_BEGIN

 /**
@@ -49,16 +51,18 @@ ORK_CLASS_AVAILABLE
 /**
 Returns an initialized accelerometer recorder using the specified frequency.
 
- @param frequency    The frequency of accelerometer data collected from CoreMotion, in hertz (Hz).
+ @param identifier          The unique identifier of the recorder (assigned by the recorder configuration).
+ @param frequency           The frequency of accelerometer data collected from CoreMotion, in hertz (Hz).
+ @param step                The step that requested this recorder.
+ @param outputDirectory     The directory in which the accelerometer data should be stored.
+ 
 @return An initialized accelerometer recorder.
 */
- (instancetype)initWithFrequency:(double)frequency
-                             step:(ORKStep *)step
-                  outputDirectory:(NSURL *)outputDirectory;
+- (instancetype)initWithIdentifier:(NSString *)identifer
+                         frequency:(double)frequency
+                              step:(nullable ORKStep *)step
+                   outputDirectory:(nullable NSURL *)outputDirectory;

@end

 NS_ASSUME_NONNULL_END
-
-
-
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKAccelerometerRecorder.h"
 #import "ORKDataLogger.h"
 #import "CMAccelerometerData+ORKJSONDictionary.h"
@@ -37,36 +38,34 @@
 #import "ORKHelpers.h"


-@interface ORKAccelerometerRecorder()
-{
+@interface ORKAccelerometerRecorder () {
    ORKDataLogger *_logger;
    NSError *_recordingError;
 }
+
@property (nonatomic, strong) CMMotionManager *motionManager;
+
@property (nonatomic) NSTimeInterval uptime;

@end

+
@implementation ORKAccelerometerRecorder

- (instancetype)initWithFrequency:(double)frequency step:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory
-{
-    self = [super initWithStep:step outputDirectory:outputDirectory];
-    if (self)
-    {
+- (instancetype)initWithIdentifier:(NSString *)identifier frequency:(double)frequency step:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
+    self = [super initWithIdentifier:identifier step:step outputDirectory:outputDirectory];
+    if (self) {
        self.frequency = frequency;
        self.continuesInBackground = YES;
    }
    return self;
 }

- (void)dealloc
-{
+- (void)dealloc {
    [_logger finishCurrentLog];
 }

- (NSString *)recorderType
-{
+- (NSString *)recorderType {
    return @"accel";
 }

@@ -83,8 +82,8 @@
 }

 - (void)start {
-    
    [super start];
+    
    self.motionManager = [self createMotionManager];
    
    if (! _logger) {
@@ -96,8 +95,7 @@
        }
    }
    
-    if (! self.motionManager || ! self.motionManager.accelerometerAvailable)
-    {
+    if (! self.motionManager || ! self.motionManager.accelerometerAvailable) {
        NSError *error = [NSError errorWithDomain:NSCocoaErrorDomain
                                             code:NSFeatureUnsupportedError
                                         userInfo:@{@"recorder" : self}];
@@ -131,7 +129,7 @@
 }

 - (NSDictionary *)userInfo {
-    return  @{ @"frequency" : @(self.frequency) };;
+    return  @{ @"frequency" : @(self.frequency) };
 }

 - (void)stop {
@@ -150,28 +148,24 @@
    [super stop];
 }

- (void)doStopRecording
-{
+- (void)doStopRecording {
    if (self.isRecording) {
        [self.motionManager stopAccelerometerUpdates];
        self.motionManager = nil;
    }
 }

- (void)finishRecordingWithError:(NSError *)error
-{
+- (void)finishRecordingWithError:(NSError *)error {
    [self doStopRecording];
    [super finishRecordingWithError:nil];
 }

- (void)reset
-{
+- (void)reset {
    [super reset];
    
    _logger = nil;
 }

-
 - (BOOL)isRecording {
    return self.motionManager.accelerometerActive;
 }
@@ -180,67 +174,65 @@
    return @"application/json";
 }

-
-
@end


-@interface ORKAccelerometerRecorderConfiguration()
+@interface ORKAccelerometerRecorderConfiguration ()
+
@end

+
@implementation ORKAccelerometerRecorderConfiguration

 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wobjc-designated-initializers"
- (instancetype)initWithFrequency:(double)freq {
-    self = [self ork_init];
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    @throw [NSException exceptionWithName:NSGenericException reason:@"Use subclass designated initializer" userInfo:nil];
+}
+
+- (instancetype)initWithIdentifier:(NSString *)identifier frequency:(double)frequency {
+    self = [super initWithIdentifier:identifier];
    if (self) {
-        _frequency = freq;
+        _frequency = frequency;
    }
    return self;
 }
 #pragma clang diagnostic pop

- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory
-{
-    return [[ORKAccelerometerRecorder alloc] initWithFrequency:self.frequency step:step outputDirectory:outputDirectory];
+- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
+    return [[ORKAccelerometerRecorder alloc] initWithIdentifier:self.identifier
+                                                      frequency:self.frequency
+                                                           step:step
+                                                outputDirectory:outputDirectory];
 }

- (instancetype)initWithCoder:(NSCoder *)aDecoder
-{
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
-    if (self)
-    {
+    if (self) {
        ORK_DECODE_DOUBLE(aDecoder, frequency);
    }
    return self;
 }

- (void)encodeWithCoder:(NSCoder *)aCoder
-{
+- (void)encodeWithCoder:(NSCoder *)aCoder {
    [super encodeWithCoder:aCoder];
    ORK_ENCODE_DOUBLE(aCoder, frequency);
 }

-+ (BOOL)supportsSecureCoding
-{
+ (BOOL)supportsSecureCoding {
    return YES;
 }

-
 - (BOOL)isEqual:(id)object {
    BOOL isParentSame = [super isEqual:object];
    
    __typeof(self) castObject = object;
    return (isParentSame &&
-            (self.frequency == castObject.frequency)) ;
+            (self.frequency == castObject.frequency));
 }

-
 - (ORKPermissionMask)requestedPermissionMask {
    return ORKPermissionCoreMotionAccelerometer;
 }

-
-
@end
@@ -33,6 +33,7 @@
 #import <ResearchKit/ORKStep.h>
 #import <UIKit/UIKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

 /**
@@ -100,7 +101,6 @@ automatically navigates forward when the timer expires.
 */
@property (nonatomic) BOOL shouldSpeakCountDown;

-
 /**
 A Boolean value indicating whether to start the count down timer automatically when the step starts, or
 require the user to take some explicit action to start the step, such as tapping a button.
@@ -193,7 +193,6 @@ The default value of this property is `NO`.
 */
@property (nonatomic, copy, nullable) NSArray *recorderConfigurations;

-
 /**
 The set of HealthKit types the step requests for reading. (read-only)
 
@@ -206,20 +205,6 @@ The default value of this property is `NO`.
 */
@property (nonatomic, readonly, nullable) NSSet *requestedHealthKitTypesForReading;

-/**
- The set of access permissions required for the step. (read-only)
- 
- The permission mask is used by the task view controller to determine the types of
- access to request from users when they complete the initial instruction steps
- in a task. If your step requires access to APIs that limit access, include
- the permissions you require in this mask.
- 
- By default, the property scans the recorders and collates the permissions
- required by the recorders. Subclasses may override this implementation.
- */
-@property (nonatomic, readonly) ORKPermissionMask requestedPermissions;
-
-
@end

 NS_ASSUME_NONNULL_END
@@ -36,10 +36,10 @@
 #import "ORKActiveStepViewController.h"
 #import "ORKRecorder_Private.h"

+
@implementation ORKActiveStep

-+ (Class)stepViewControllerClass
-{
+ (Class)stepViewControllerClass {
    return [ORKActiveStepViewController class];
 }

@@ -53,25 +53,23 @@

 - (BOOL)hasTitle {
    NSString *title = self.title;
-    return  ( title != nil && title.length > 0);
+    return  (title != nil && title.length > 0);
 }

 - (BOOL)hasText {
    NSString *text = self.text;
-    return  ( text != nil && text.length > 0);
+    return  (text != nil && text.length > 0);
 }

 - (BOOL)hasVoice {
-    return  ( _spokenInstruction != nil && _spokenInstruction.length > 0);
+    return  (_spokenInstruction != nil && _spokenInstruction.length > 0);
 }

 - (BOOL)isRestorable {
    return NO;
 }

-
-+ (BOOL)supportsSecureCoding
-{
+ (BOOL)supportsSecureCoding {
    return YES;
 }

@@ -83,8 +81,7 @@
    return self;
 }

- (instancetype)copyWithZone:(NSZone *)zone
-{
+- (instancetype)copyWithZone:(NSZone *)zone {
    ORKActiveStep *step = [super copyWithZone:zone];
    step.stepDuration = self.stepDuration;
    step.shouldStartTimerAutomatically = self.shouldStartTimerAutomatically;
@@ -102,12 +99,9 @@
    return step;
 }

-
- (instancetype)initWithCoder:(NSCoder *)aDecoder
-{
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
-    if (self)
-    {
+    if (self ) {
        ORK_DECODE_DOUBLE(aDecoder, stepDuration);
        ORK_DECODE_BOOL(aDecoder, shouldStartTimerAutomatically);
        ORK_DECODE_BOOL(aDecoder, shouldSpeakCountDown);
@@ -125,8 +119,7 @@
    return self;
 }

- (void)encodeWithCoder:(NSCoder *)aCoder
-{
+- (void)encodeWithCoder:(NSCoder *)aCoder {
    [super encodeWithCoder:aCoder];
    ORK_ENCODE_DOUBLE(aCoder, stepDuration);
    ORK_ENCODE_BOOL(aCoder, shouldStartTimerAutomatically);
@@ -143,8 +136,6 @@
    ORK_ENCODE_OBJ(aCoder, recorderConfigurations);
 }

-
-
 - (BOOL)isEqual:(id)object {
    BOOL isParentSame = [super isEqual:object];
    
@@ -162,13 +153,9 @@
            (self.shouldVibrateOnStart == castObject.shouldVibrateOnStart) &&
            (self.shouldVibrateOnFinish == castObject.shouldVibrateOnFinish) &&
            (self.shouldContinueOnFinish == castObject.shouldContinueOnFinish) &&
-            (self.shouldUseNextAsSkipButton == castObject.shouldUseNextAsSkipButton)) ;
+            (self.shouldUseNextAsSkipButton == castObject.shouldUseNextAsSkipButton));
 }

-
-
-
-
 - (NSSet *)requestedHealthKitTypesForReading {
    NSMutableSet *set = [NSMutableSet set];
    for (ORKRecorderConfiguration *config in self.recorderConfigurations) {
@@ -178,11 +165,10 @@
        }
    }
    return set;
-    
 }

 - (ORKPermissionMask)requestedPermissions {
-    ORKPermissionMask mask = ORKPermissionNone;
+    ORKPermissionMask mask = [super requestedPermissions];
    for (ORKRecorderConfiguration *config in self.recorderConfigurations) {
        mask |= [config requestedPermissionMask];
    }
@@ -28,15 +28,18 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit_Private.h>
 #import "ORKLabel.h"

+
 NS_ASSUME_NONNULL_BEGIN

@interface ORKQuantityLabel : ORKLabel

@end

+
@interface ORKActiveStepQuantityView : UIView

@property (nonatomic, strong, nullable) NSString *title;
@@ -44,13 +47,12 @@ NS_ASSUME_NONNULL_BEGIN
@property (nonatomic, strong, nullable) UIImage *image;
@property (nonatomic) BOOL enabled;

-
-@property (nonatomic, readonly, strong, nullable) UILabel *titleLabel;
-@property (nonatomic, readonly, strong, nullable) UILabel *valueLabel;
-
+@property (nonatomic, strong, readonly, nullable) UILabel *titleLabel;
+@property (nonatomic, strong, readonly, nullable) UILabel *valueLabel;

@end

+
@interface ORKQuantityPairView : UIView

@property (nonatomic, strong, nullable) ORKActiveStepQuantityView *leftView;
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKActiveStepQuantityView.h"
 #import "ORKHelpers.h"
 #import "ORKSkin.h"
@@ -44,12 +45,13 @@
@end


-@implementation ORKActiveStepQuantityView
-{
+@implementation ORKActiveStepQuantityView {
    ORKSubheadlineLabel *_titleLabel;
    ORKQuantityLabel *_valueLabel;
    ORKTintedImageView *_imageView;
    UIView *_valueHolder;
+    
+    NSLayoutConstraint *_zeroWidthConstraint;
 }

 - (instancetype)initWithFrame:(CGRect)frame {
@@ -82,8 +84,8 @@
            view.isAccessibilityElement = NO;
        }
        
+        [self setupConstraints];
        [self setNeedsUpdateConstraints];
-        
    }
    return self;
 }
@@ -109,69 +111,95 @@
    _imageView.image = image;
 }

- (void)updateConstraints {
-    [self removeConstraints:[self constraints]];
+- (void)setupConstraints {
    
    const CGFloat TitleBaselineToValueBaseline = 40;
    const CGFloat ValueBaselineToBottom = 36;
    
-    if (! _enabled) {
-        NSLayoutConstraint *zeroWidthConstraint = [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:0];
-        zeroWidthConstraint.priority = UILayoutPriorityRequired-1;
-        [self addConstraint:zeroWidthConstraint];
-    }
-    NSDictionary *views = NSDictionaryOfVariableBindings(_titleLabel, _valueLabel, _imageView);
    NSMutableArray *additionalConstraints = [NSMutableArray array];
-    [additionalConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_titleLabel]" options:0 metrics:nil views:views]];
-    [additionalConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_titleLabel]|" options:0 metrics:nil views:views]];
-    [additionalConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_imageView]-10-[_valueLabel]|" options:NSLayoutFormatAlignAllCenterY metrics:nil views:views]];
+    NSDictionary *views = NSDictionaryOfVariableBindings(_titleLabel, _valueLabel, _imageView);
+    [additionalConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_titleLabel]"
+                                                                                       options:(NSLayoutFormatOptions)0
+                                                                                       metrics:nil
+                                                                                         views:views]];
+    [additionalConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_titleLabel]|"
+                                                                                       options:(NSLayoutFormatOptions)0
+                                                                                       metrics:nil
+                                                                                         views:views]];
+    [additionalConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_imageView]-10-[_valueLabel]|"
+                                                                                       options:NSLayoutFormatAlignAllCenterY
+                                                                                       metrics:nil
+                                                                                         views:views]];
    [additionalConstraints addObject:[NSLayoutConstraint constraintWithItem:_valueLabel
                                                                  attribute:NSLayoutAttributeFirstBaseline
                                                                  relatedBy:NSLayoutRelationEqual
                                                                     toItem:_titleLabel
                                                                  attribute:NSLayoutAttributeLastBaseline
-                                                                 multiplier:1 constant:TitleBaselineToValueBaseline]];
+                                                                 multiplier:1.0
+                                                                   constant:TitleBaselineToValueBaseline]];
    [additionalConstraints addObject:[NSLayoutConstraint constraintWithItem:self
                                                                  attribute:NSLayoutAttributeBottom
                                                                  relatedBy:NSLayoutRelationEqual
                                                                     toItem:_valueLabel
                                                                  attribute:NSLayoutAttributeLastBaseline
-                                                                 multiplier:1 constant:ValueBaselineToBottom]];
+                                                                 multiplier:1.0
+                                                                   constant:ValueBaselineToBottom]];
    [additionalConstraints addObject:[NSLayoutConstraint constraintWithItem:_valueHolder
                                                                  attribute:NSLayoutAttributeCenterX
                                                                  relatedBy:NSLayoutRelationEqual
                                                                     toItem:self
                                                                  attribute:NSLayoutAttributeCenterX
-                                                                 multiplier:1 constant:0]];
+                                                                 multiplier:1.0
+                                                                   constant:0.0]];
    [additionalConstraints addObject:[NSLayoutConstraint constraintWithItem:_valueLabel
                                                                  attribute:NSLayoutAttributeTop
                                                                  relatedBy:NSLayoutRelationGreaterThanOrEqual
                                                                     toItem:_valueHolder
                                                                  attribute:NSLayoutAttributeTop
-                                                                 multiplier:1 constant:0]];
+                                                                 multiplier:1.0
+                                                                   constant:0.0]];
    [additionalConstraints addObject:[NSLayoutConstraint constraintWithItem:_valueLabel
                                                                  attribute:NSLayoutAttributeBottom
                                                                  relatedBy:NSLayoutRelationLessThanOrEqual
                                                                     toItem:_valueHolder
                                                                  attribute:NSLayoutAttributeBottom
-                                                                 multiplier:1 constant:0]];
+                                                                 multiplier:1.0
+                                                                   constant:0.0]];
    [additionalConstraints addObject:[NSLayoutConstraint constraintWithItem:_valueHolder
                                                                  attribute:NSLayoutAttributeLeft
                                                                  relatedBy:NSLayoutRelationGreaterThanOrEqual
                                                                     toItem:self
                                                                  attribute:NSLayoutAttributeLeft
-                                                                 multiplier:1 constant:0]];
+                                                                 multiplier:1.0
+                                                                   constant:0.0]];
    [additionalConstraints addObject:[NSLayoutConstraint constraintWithItem:_valueHolder
                                                                  attribute:NSLayoutAttributeRight
                                                                  relatedBy:NSLayoutRelationLessThanOrEqual
                                                                     toItem:self
                                                                  attribute:NSLayoutAttributeRight
-                                                                 multiplier:1 constant:0]];
+                                                                 multiplier:1.0
+                                                                   constant:0.0]];
    for (NSLayoutConstraint *constraint in additionalConstraints) {
-        constraint.priority = UILayoutPriorityDefaultHigh;
+        constraint.priority = UILayoutPriorityRequired-2;
    }
-    [self addConstraints:additionalConstraints];
    
+    [NSLayoutConstraint activateConstraints:additionalConstraints];
+    
+    
+    NSLayoutConstraint *zeroWidthConstraint = [NSLayoutConstraint constraintWithItem:self
+                                                                           attribute:NSLayoutAttributeWidth
+                                                                           relatedBy:NSLayoutRelationEqual
+                                                                              toItem:nil
+                                                                           attribute:NSLayoutAttributeNotAnAttribute
+                                                                          multiplier:1.0
+                                                                            constant:0.0];
+    zeroWidthConstraint.priority = UILayoutPriorityRequired-1;
+    _zeroWidthConstraint = zeroWidthConstraint;
+    _zeroWidthConstraint.active = !_enabled;
+}
+
+- (void)updateConstraints {
+    _zeroWidthConstraint.active = !_enabled;
    [super updateConstraints];
 }

@@ -195,10 +223,9 @@

@end

-@implementation ORKQuantityPairView
-{
+
+@implementation ORKQuantityPairView {
    UIView *_metricKeyline;
-    NSArray *_constraints;
 }

 - (instancetype)initWithFrame:(CGRect)frame {
@@ -215,59 +242,88 @@
        [self setKeylineHidden:NO];
        _metricKeyline.backgroundColor = [UIColor ork_midGrayTintColor];
        
-        
        [self addSubview:_leftView];
        [self addSubview:_rightView];
        [self addSubview:_metricKeyline];
-        [self setNeedsUpdateConstraints];
-        
+        [self setupConstraints];
    }
    return self;
 }

- (void)updateConstraints {
+- (void)setupConstraints {
    
-    
-    if (_constraints) {
-        [self removeConstraints:_constraints];
-        _constraints = nil;
-    }
    NSMutableArray *constraints = [NSMutableArray array];
    NSDictionary *views = NSDictionaryOfVariableBindings(_leftView, _rightView, _metricKeyline);
    
    // Leave space for the keyline between these views, and then constrain it to be 1px wide and go from top to bottom baseline of metric views.
    CGFloat scale = [[UIScreen mainScreen] scale];
-    NSArray *vertConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_leftView]|" options:(NSLayoutFormatOptions)0 metrics:nil views:views];
+    NSArray *vertConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_leftView]|"
+                                                                       options:(NSLayoutFormatOptions)0
+                                                                       metrics:nil
+                                                                         views:views];
    [constraints addObjectsFromArray:vertConstraints];
    
-    NSArray *horizConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_leftView]-s-[_rightView]-|" options:NSLayoutFormatAlignAllTop|NSLayoutFormatAlignAllBottom|NSLayoutFormatDirectionLeftToRight metrics:@{@"s":@(1/scale)} views:views];
+    NSArray *horizConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_leftView]-s-[_rightView]-|"
+                                                                        options:NSLayoutFormatAlignAllTop|NSLayoutFormatAlignAllBottom|NSLayoutFormatDirectionLeftToRight
+                                                                        metrics:@{ @"s": @(1/scale) }
+                                                                          views:views];
    for (NSLayoutConstraint *constraint in horizConstraints) {
        constraint.priority = UILayoutPriorityDefaultHigh+1;
    }
    [constraints addObjectsFromArray:horizConstraints];
    
-    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[_leftView][_metricKeyline(==s)]" options:NSLayoutFormatAlignAllTop|NSLayoutFormatDirectionLeftToRight metrics:@{@"s":@(1/scale)} views:views]];
+    // Ensure baseline alignment of title and value
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_leftView.titleLabel
+                                                        attribute:NSLayoutAttributeFirstBaseline
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:_rightView.titleLabel
+                                                        attribute:NSLayoutAttributeFirstBaseline
+                                                       multiplier:1.0
+                                                         constant:0.0]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_leftView.valueLabel
+                                                        attribute:NSLayoutAttributeFirstBaseline
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:_rightView.valueLabel
+                                                        attribute:NSLayoutAttributeFirstBaseline
+                                                       multiplier:1.0
+                                                         constant:0.0]];
+    
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[_leftView][_metricKeyline(==s)]"
+                                                                             options:NSLayoutFormatAlignAllTop|NSLayoutFormatDirectionLeftToRight
+                                                                             metrics:@{ @"s": @(1/scale) }
+                                                                               views:views]];
    NSLayoutConstraint *keylineBottom = [NSLayoutConstraint constraintWithItem:_metricKeyline
                                                                     attribute:NSLayoutAttributeBottom
                                                                     relatedBy:NSLayoutRelationEqual
                                                                        toItem:_leftView.valueLabel
                                                                     attribute:NSLayoutAttributeLastBaseline
-                                                                    multiplier:1 constant:0];
+                                                                    multiplier:1.0
+                                                                      constant:0.0];
    [constraints addObject:keylineBottom];
    
-    NSLayoutConstraint *maxWidthConstraint = [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:10000];
+    NSLayoutConstraint *maxWidthConstraint = [NSLayoutConstraint constraintWithItem:self
+                                                                          attribute:NSLayoutAttributeWidth
+                                                                          relatedBy:NSLayoutRelationEqual
+                                                                             toItem:nil
+                                                                          attribute:NSLayoutAttributeNotAnAttribute
+                                                                         multiplier:1.0
+                                                                           constant:ORKScreenMetricMaxDimension];
    maxWidthConstraint.priority = UILayoutPriorityRequired-2;
    [constraints addObject:maxWidthConstraint];
    
    
    // This constraint should be beaten out by the full-width-coverage and zero-width constraints if only one of the views is enabled.
-    NSLayoutConstraint *equalWidthConstraint = [NSLayoutConstraint constraintWithItem:_leftView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:_rightView attribute:NSLayoutAttributeWidth multiplier:1 constant:0];
+    NSLayoutConstraint *equalWidthConstraint = [NSLayoutConstraint constraintWithItem:_leftView
+                                                                            attribute:NSLayoutAttributeWidth
+                                                                            relatedBy:NSLayoutRelationEqual
+                                                                               toItem:_rightView
+                                                                            attribute:NSLayoutAttributeWidth
+                                                                           multiplier:1.0
+                                                                             constant:0.0];
    equalWidthConstraint.priority = UILayoutPriorityDefaultLow;
    [constraints addObject:equalWidthConstraint];
    
-    [self addConstraints:constraints];
-    _constraints = constraints;
-    [super updateConstraints];
+    [NSLayoutConstraint activateConstraints:constraints];
 }

 - (void)setKeylineHidden:(BOOL)keylineHidden {
@@ -276,4 +332,3 @@
 }

@end
-
@@ -28,16 +28,17 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <Foundation/Foundation.h>
 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

@class ORKActiveStepTimer;

 typedef void (^ORKActiveStepTimerHandler)(ORKActiveStepTimer *timer, BOOL finished);

-
@interface ORKActiveStepTimer : NSObject

 - (instancetype)initWithDuration:(NSTimeInterval)duration interval:(NSTimeInterval)interval runtime:(NSTimeInterval)runtime handler:(ORKActiveStepTimerHandler)handler;
@@ -28,24 +28,23 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKActiveStepTimer.h"
 #include <mach/mach.h>
 #include <mach/mach_time.h>
 #import <UIKit/UIKit.h>

+
 static NSTimeInterval timeIntervalFromMachTime(uint64_t delta) {
-    
    static mach_timebase_info_data_t    sTimebaseInfo;
    if ( sTimebaseInfo.denom == 0 ) {
        (void) mach_timebase_info(&sTimebaseInfo);
    }
    uint64_t elapsedNano = delta * sTimebaseInfo.numer / sTimebaseInfo.denom;
-    
    return elapsedNano * 1.0 / NSEC_PER_SEC;
 }

-@implementation ORKActiveStepTimer
-{
+@implementation ORKActiveStepTimer {
    uint64_t _startTime;
    NSTimeInterval _preExistingRuntime;
    dispatch_queue_t _queue;
@@ -54,7 +53,6 @@ static NSTimeInterval timeIntervalFromMachTime(uint64_t delta) {
    uint32_t _isRunning;
 }

-
 - (instancetype)initWithDuration:(NSTimeInterval)duration interval:(NSTimeInterval)interval runtime:(NSTimeInterval)runtime handler:(ORKActiveStepTimerHandler)handler {
    self = [super init];
    if (self) {
@@ -158,10 +156,10 @@ static NSTimeInterval timeIntervalFromMachTime(uint64_t delta) {
    if (_backgroundTaskIdentifier == UIBackgroundTaskInvalid) {
        return;
    }
-    UIBackgroundTaskIdentifier ident = _backgroundTaskIdentifier;
+    UIBackgroundTaskIdentifier identifier = _backgroundTaskIdentifier;
    _backgroundTaskIdentifier = UIBackgroundTaskInvalid;
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
-        [[UIApplication sharedApplication] endBackgroundTask:ident];
+        [[UIApplication sharedApplication] endBackgroundTask:identifier];
    });
 }

@@ -178,7 +176,6 @@ static NSTimeInterval timeIntervalFromMachTime(uint64_t delta) {
 }

 - (void)queue_resume {
-    
    if (_timer != NULL) {
        // Already resumed
        return;
@@ -211,7 +208,7 @@ static NSTimeInterval timeIntervalFromMachTime(uint64_t delta) {
    _startTime = mach_absolute_time();
    dispatch_source_set_timer(_timer,
                              dispatch_time(DISPATCH_TIME_NOW, timeUntilNextFire * NSEC_PER_SEC),
-                              _interval * NSEC_PER_SEC ,
+                              _interval * NSEC_PER_SEC,
                              0.05 * NSEC_PER_SEC);
    dispatch_resume(_timer);
 }
@@ -239,5 +236,4 @@ static NSTimeInterval timeIntervalFromMachTime(uint64_t delta) {
    [self queue_releaseBackgroundTask];
 }

-
@end
@@ -28,13 +28,14 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

-#import <UIKit/UIKit.h>

+#import <UIKit/UIKit.h>
 #import <ResearchKit/ResearchKit_Private.h>
 #import "ORKCustomStepView_Internal.h"
 #import "ORKCountdownLabel.h"
 #import "ORKTextButton.h"

+
 NS_ASSUME_NONNULL_BEGIN

@interface ORKActiveStepTimerView : ORKActiveStepCustomView
@@ -46,4 +47,4 @@ NS_ASSUME_NONNULL_BEGIN

@end

-NS_ASSUME_NONNULL_END
+NS_ASSUME_NONNULL_END
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKActiveStepTimerView.h"
 #import "ORKActiveStepTimer.h"
 #import "ORKHelpers.h"
@@ -41,18 +42,14 @@
 #import "ORKStepViewController_Internal.h"


-@implementation ORKActiveStepTimerView
-{
+@implementation ORKActiveStepTimerView {
    BOOL _started;
    BOOL _registeredForNotifications;
 }

- (instancetype)initWithFrame:(CGRect)frame
-{
+- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
-    if (self)
-    {
-        
+    if (self) {
        // Count Down
        {
            _countDownLabel = [ORKCountdownLabel new];
@@ -61,10 +58,8 @@
            
            [self addSubview:_countDownLabel];
        }
-        
        // Count down start button
        {
-            
            _startTimerButton = [ORKTextButton new];
            [_startTimerButton setTitle:ORKLocalizedString(@"BUTTON_START_TIMER", nil) forState:UIControlStateNormal];
            [_startTimerButton addTarget:self action:@selector(startTimerButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
@@ -76,16 +71,14 @@
        _countDownLabel.accessibilityTraits |= UIAccessibilityTraitUpdatesFrequently;
        
        [self setTranslatesAutoresizingMaskIntoConstraints:NO];
-        
-        
    }
    return self;
 }

 - (void)applicationDidBecomeActive:(NSNotification *)notification {
-    ORKActiveStepViewController *vc = self.activeStepViewController;
-    if (vc) {
-        [self updateDisplay:vc];
+    ORKActiveStepViewController *viewController = self.activeStepViewController;
+    if (viewController) {
+        [self updateDisplay:viewController];
    }
 }

@@ -93,7 +86,7 @@
    if (registered == _registeredForNotifications) {
        return;
    }
-    
+
    registered = _registeredForNotifications;
    NSNotificationCenter *nfc = [NSNotificationCenter defaultCenter];
    if (registered) {
@@ -107,9 +100,7 @@
    [self setRegisteredForNotifications:(self.window != nil)];
 }

-
- (void)setStep:(ORKActiveStep *)step
-{
+- (void)setStep:(ORKActiveStep *)step {
    _step = step;
    _countDownLabel.hidden = !(_step.hasCountDown);
    BOOL hasTimerButton = (_step.hasCountDown && _step.shouldStartTimerAutomatically == NO);
@@ -121,19 +112,16 @@
    [self setNeedsUpdateConstraints];
 }

- (void)startTimerButtonTapped:(id)sender
-{
+- (void)startTimerButtonTapped:(id)sender {
    [self.activeStepViewController start];
    UIAccessibilityPostNotification(UIAccessibilityLayoutChangedNotification, _countDownLabel);
 }

-
 - (void)updateDisplay:(ORKActiveStepViewController *)viewController {
    NSInteger countDownValue = (NSInteger)round(viewController.timeRemaining);
    [_countDownLabel setCountDownValue:countDownValue];
 }

-
 - (void)resetStep:(ORKActiveStepViewController *)viewController {
    self.step = (ORKActiveStep *)viewController.step;
 }
@@ -147,8 +135,7 @@

 - (void)resumeStep:(ORKActiveStepViewController *)viewController {
    self.step = (ORKActiveStep *)viewController.step;
-    if ([viewController timerActive])
-    {
+    if ([viewController timerActive]) {
        _startTimerButton.alpha = 0;
        [self updateDisplay:viewController];
    }
@@ -157,44 +144,57 @@
 - (void)finishStep:(ORKActiveStepViewController *)viewController {
 }

- (void)setNeedsUpdateConstraints
-{
+- (void)setNeedsUpdateConstraints {
    [NSLayoutConstraint deactivateConstraints:[self constraints]];
    [super setNeedsUpdateConstraints];
    
 }

- (void)updateConstraints
-{
+- (void)updateConstraints {
    NSDictionary *dictionary = NSDictionaryOfVariableBindings(_countDownLabel, _startTimerButton);
    NSDictionary *metrics = @{@"CS" : @(2)};
    ORKEnableAutoLayoutForViews([dictionary allValues]);
    
-    for (UIView *v in [dictionary allValues])
-    {
-        [self addConstraint:[NSLayoutConstraint constraintWithItem:v attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationLessThanOrEqual toItem:self attribute:NSLayoutAttributeWidth multiplier:1 constant:0]];
-        [self addConstraint:[NSLayoutConstraint constraintWithItem:v attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationLessThanOrEqual toItem:self attribute:NSLayoutAttributeCenterX multiplier:1 constant:0]];
+    for (UIView *view in [dictionary allValues]) {
+        [self addConstraint:[NSLayoutConstraint
+                             constraintWithItem:view
+                             attribute:NSLayoutAttributeWidth
+                             relatedBy:NSLayoutRelationLessThanOrEqual
+                             toItem:self
+                             attribute:NSLayoutAttributeWidth
+                             multiplier:1
+                             constant:0]];
+        [self addConstraint:[NSLayoutConstraint
+                             constraintWithItem:view
+                             attribute:NSLayoutAttributeCenterX
+                             relatedBy:NSLayoutRelationLessThanOrEqual
+                             toItem:self
+                             attribute:NSLayoutAttributeCenterX
+                             multiplier:1
+                             constant:0]];
    }
    
-    if (! _countDownLabel.hidden)
-    {
+    if (! _countDownLabel.hidden) {
        NSMutableString *verticalLayout = [NSMutableString new];
        [verticalLayout appendString:@"V:|[_countDownLabel]"];
-        if (! _startTimerButton.hidden)
-        {
+        if (! _startTimerButton.hidden) {
            [verticalLayout appendString:@"-CS-[_startTimerButton]"];
        }
        [verticalLayout appendString:@"|"];
-        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:verticalLayout options:NSLayoutFormatAlignAllCenterX metrics:metrics views:dictionary]];
+        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:verticalLayout
+                                                                     options:NSLayoutFormatAlignAllCenterX
+                                                                     metrics:metrics
+                                                                       views:dictionary]];
+    } else {
+        [self addConstraint:[NSLayoutConstraint constraintWithItem:self
+                                                         attribute:NSLayoutAttributeHeight
+                                                         relatedBy:NSLayoutRelationEqual
+                                                            toItem:nil
+                                                         attribute:NSLayoutAttributeNotAnAttribute
+                                                        multiplier:1
+                                                          constant:0]];
    }
-    else
-    {
-        [self addConstraint:[NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:0]];
-    }
-    
    [super updateConstraints];
 }

-
@end
-
@@ -35,7 +35,6 @@

 NS_ASSUME_NONNULL_BEGIN

-
 /**
 The `ORKActiveStepViewController` class is the base class for displaying `ORKActiveStep`
 subclasses. The predefined active tasks defined in `ORKOrderedTask` all make use
@@ -105,10 +104,8 @@ ORK_CLASS_AVAILABLE
 */
@property (nonatomic, strong, readonly, nullable) NSArray *recorders;

-
 /// @name Active step life cycle

-
 /**
 A Boolean value that indicates whether the step has finished. (read-only)
 
@@ -118,8 +115,7 @@ ORK_CLASS_AVAILABLE
 
 In addition, when a step is finished, all recorders are stopped.
 */
-@property (nonatomic, assign, getter=isFinished, readonly) BOOL finished;
-
+@property (nonatomic, assign, readonly, getter=isFinished) BOOL finished;

 /**
 A Boolean value that indicates whether the step has started. (read-only)
@@ -140,7 +136,6 @@ ORK_CLASS_AVAILABLE
 */
 - (void)stepDidFinish;

-
 /**
 A Boolean value that indicates whether to suspend the step if the app is not
 active or the screen is off.
@@ -48,7 +48,8 @@
 #import "ORKStepHeaderView_Internal.h"
 #import "ORKActiveStepView.h"

-@interface ORKActiveStepViewController (){
+
+@interface ORKActiveStepViewController () {
    ORKActiveStepView *_activeStepView;
    ORKActiveStepTimer *_activeStepTimer;

@@ -76,10 +77,8 @@
        _timerUpdateInterval = 1;
    }
    return self;
-    
 }

-
 - (void)applicationWillResignActive:(NSNotification *)notification {
    if (self.suspendIfInactive) {
        [self suspend];
@@ -100,8 +99,7 @@
    return _activeStepView;
 }

- (void)viewDidLoad
-{
+- (void)viewDidLoad {
    [super viewDidLoad];
    
    _activeStepView = [[ORKActiveStepView alloc] initWithFrame:self.view.bounds];
@@ -119,8 +117,8 @@
    
    [self prepareStep];
 }
- (void)stepDidChange
-{
+
+- (void)stepDidChange {
    [super stepDidChange];
    _activeStepView.activeStep = [self activeStep];
    [self updateContinueButtonItem];
@@ -129,20 +127,17 @@
    [self prepareStep];
 }

- (UIView *)customViewContainer
-{
-    __unused UIView *v = [self view];
+- (UIView *)customViewContainer {
+    __unused UIView *view = [self view];
    return _activeStepView.customViewContainer;
 }

- (UIImageView *)imageView
-{
-    __unused UIView *v = [self view];
+- (ORKTintedImageView *)imageView {
+    __unused UIView *view = [self view];
    return _activeStepView.imageView;
 }

- (void)setCustomView:(UIView *)customView
-{
+- (void)setCustomView:(UIView *)customView {
    _customView = customView;
    [_activeStepView setStepView:_customView];
 }
@@ -154,21 +149,16 @@
    [self.taskViewController setRegisteredScrollView:_activeStepView];
 }

-
 - (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    ORK_Log_Debug(@"%@",self);
    
    // Wait for animation complete 
    dispatch_async(dispatch_get_main_queue(), ^{
-        
-        if ([[self activeStep] shouldStartTimerAutomatically])
-        {
+        if ([[self activeStep] shouldStartTimerAutomatically]) {
            [self start];
        }
    });
-    
-    
 }

 - (void)viewWillDisappear:(BOOL)animated {
@@ -187,22 +177,18 @@
    [self updateContinueButtonItem];
 }

- (void)setLearnMoreButtonItem:(UIBarButtonItem *)learnMoreButtonItem
-{
+- (void)setLearnMoreButtonItem:(UIBarButtonItem *)learnMoreButtonItem {
    [super setLearnMoreButtonItem:learnMoreButtonItem];
    _activeStepView.headerView.learnMoreButtonItem = self.learnMoreButtonItem;
 }

- (void)setSkipButtonItem:(UIBarButtonItem *)skipButtonItem
-{
+- (void)setSkipButtonItem:(UIBarButtonItem *)skipButtonItem {
    [super setSkipButtonItem:skipButtonItem];
    _activeStepView.continueSkipContainer.skipButtonItem = skipButtonItem;
 }

- (void)setFinished:(BOOL)finished
-{
+- (void)setFinished:(BOOL)finished {
    _finished = finished;
-    
    _activeStepView.continueSkipContainer.continueEnabled = finished;
 }

@@ -215,28 +201,21 @@
 #pragma mark - transition

 - (void)recordersDidChange {
-    
 }

 - (void)recordersWillStart {
-    
 }

 - (void)recordersWillStop {
-    
 }

-
- (void)prepareRecorders
-{
+- (void)prepareRecorders {
    // Stop any existing recorders
    [self recordersWillStop];
-    for (ORKRecorder *recorder in self.recorders)
-    {
+    for (ORKRecorder *recorder in self.recorders) {
        recorder.delegate = nil;
        [recorder stop];
    }
-    
    NSMutableArray *recorders = [NSMutableArray array];
    
    for (ORKRecorderConfiguration * provider in self.activeStep.recorderConfigurations) {
@@ -249,7 +228,6 @@
        
        [recorders addObject:recorder];
    }
-
    self.recorders = recorders;
    
    [self recordersDidChange];
@@ -261,8 +239,7 @@
 }

 - (void)prepareStep {
-    
-    if (self.activeStep==nil) {
+    if (self.activeStep == nil) {
        return;
    }
    
@@ -271,13 +248,10 @@
    ORK_Log_Debug(@"%@", self);
    _activeStepView.activeStep = self.activeStep;
    
-    if ([self.activeStep hasCountDown])
-    {
+    if ([self.activeStep hasCountDown]) {
        ORKActiveStepTimerView *timerView = [ORKActiveStepTimerView new];
        _activeStepView.activeCustomView = timerView;
-    }
-    else
-    {
+    } else {
        _activeStepView.activeCustomView = nil;
    }
    _activeStepView.activeCustomView.activeStepViewController = self;
@@ -291,7 +265,6 @@
    [self recordersWillStart];
    // Start recorders
    for (ORKRecorder *recorder in self.recorders) {
-        
        [recorder viewController:self willStartStepWithView:self.customViewContainer];
        [recorder start];
    }
@@ -304,8 +277,7 @@
    }
 }

- (void)playSound
-{
+- (void)playSound {
    if (_alertSoundURL == nil) {
        _alertSoundURL = [NSURL URLWithString:@"/System/Library/Audio/UISounds/short_low_high.caf"];
        AudioServicesCreateSystemSoundID((__bridge CFURLRef)(_alertSoundURL), &_alertSound);
@@ -321,14 +293,11 @@
    
    [self startRecorders];
    
-    
    if (self.activeStep.shouldVibrateOnStart) {
-        
        AudioServicesPlayAlertSound(kSystemSoundID_Vibrate);
    }
    
    if (self.activeStep.shouldPlaySoundOnStart) {
-        
        [self playSound];
    }
    
@@ -337,7 +306,7 @@
        // Let VO speak "Step x of y" before the instruction.
        // If VO is not running, the text is spoken immediately.
        ORKAccessibilityPerformBlockAfterDelay(1.5, ^{
-            [[ORKVoiceEngine sharedVoiceEngine] speakText:(NSString *__nonnull)self.activeStep.spokenInstruction];
+            [[ORKVoiceEngine sharedVoiceEngine] speakText:self.activeStep.spokenInstruction];
        });
    }
 }
@@ -366,7 +335,6 @@
    [_activeStepView.activeCustomView resumeStep:self];
 }

-
 - (void)finish {
    ORK_Log_Debug(@"%@",self);
    if (self.finished) {
@@ -405,14 +373,12 @@
    _activeStepTimer = nil;
 }

- (void)startTimer
-{
+- (void)startTimer {
    [self resetTimer];
    
    NSTimeInterval stepDuration = self.activeStep.stepDuration;
    
    if (stepDuration > 0) {
-        
        __weak typeof(self) weakSelf = self;
        _activeStepTimer = [[ORKActiveStepTimer alloc] initWithDuration:stepDuration
                                                        interval:_timerUpdateInterval
@@ -426,7 +392,6 @@
 }

 - (void)countDownTimerFired:(ORKActiveStepTimer *)timer finished:(BOOL)finished {
-    
    if (finished) {
        [self finish];
    }
@@ -462,14 +427,12 @@

 #pragma mark - action handlers

- (void)stepDidFinish
-{
+- (void)stepDidFinish {
 }

 #pragma mark - ORKRecorderDelegate

 - (void)recorder:(ORKRecorder *)recorder didCompleteWithResult:(ORKResult *)result {
-    
    _recorderResults = [_recorderResults arrayByAddingObject:result];
    [self notifyDelegateOnResultChange];
 }
@@ -492,25 +455,21 @@
    }
 }

+static NSString *const _ORKFinishedRestoreKey = @"finished";
+static NSString *const _ORKRecorderResultsRestoreKey = @"recorderResults";

-static NSString * const _ORKFinishedRestoreKey = @"finished";
-static NSString * const _ORKRecorderResultsRestoreKey = @"recorderResults";
-
- (void)encodeRestorableStateWithCoder:(NSCoder *)coder
-{
+- (void)encodeRestorableStateWithCoder:(NSCoder *)coder {
    [super encodeRestorableStateWithCoder:coder];
    
    [coder encodeBool:_finished forKey:_ORKFinishedRestoreKey];
    [coder encodeObject:_recorderResults forKey:_ORKRecorderResultsRestoreKey];
 }

- (void)decodeRestorableStateWithCoder:(NSCoder *)coder
-{
+- (void)decodeRestorableStateWithCoder:(NSCoder *)coder {
    [super decodeRestorableStateWithCoder:coder];
    
    self.finished = [coder decodeBoolForKey:_ORKFinishedRestoreKey];
    _recorderResults = [coder decodeObjectOfClass:[NSArray class] forKey:_ORKRecorderResultsRestoreKey];
 }

-
@end
@@ -29,20 +29,20 @@
 */


-
 #import "ORKActiveStepViewController.h"
 #import "ORKActiveStepTimer.h"

+
 NS_ASSUME_NONNULL_BEGIN

@class ORKActiveStepView;

@interface ORKActiveStepViewController ()

-
 /**
- * The customViewContainer allows custom view to be its subview.
- * @note When ORKTouchRecorder is present, its gesture recognizer attaches to customViewContainer.
+ The customViewContainer allows custom view to be its subview.
+ 
+ @note When ORKTouchRecorder is present, its gesture recognizer attaches to customViewContainer.
 */
@property (nonatomic, strong, readonly, nullable) UIView *customViewContainer;

@@ -50,10 +50,8 @@ NS_ASSUME_NONNULL_BEGIN

@property (nonatomic, readonly) NSTimeInterval timeRemaining;
@property (nonatomic, readonly) BOOL timerActive;
-
@property (nonatomic, assign) NSTimeInterval timerUpdateInterval;

-
@property (nonatomic, assign, getter=isStarted) BOOL started;

 - (void)countDownTimerFired:(ORKActiveStepTimer *)timer finished:(BOOL)finished; // Let subclass receive timer fires
@@ -61,6 +59,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)applicationWillResignActive:(NSNotification *)notification;
 - (void)applicationDidBecomeActive:(NSNotification *)notification;

+- (void)stopRecorders;

@end

@@ -28,12 +28,14 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ORKActiveStep.h>

+
@interface ORKActiveStep ()

 /**
- * Convenience methods.
+ Convenience methods.
 */
 - (BOOL)startsFinished;
 - (BOOL)hasCountDown;
@@ -41,5 +43,4 @@
 - (BOOL)hasText;
 - (BOOL)hasVoice;

-
@end
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <UIKit/UIKit.h>
 #import "ORKCustomStepView_Internal.h"

+
 NS_ASSUME_NONNULL_BEGIN

@interface ORKAudioContentView : ORKActiveStepCustomView
@@ -38,6 +40,7 @@ NS_ASSUME_NONNULL_BEGIN
@property (nonatomic, copy, nullable) UIColor *keyColor;
@property (nonatomic, copy, nullable) UIColor *alertColor;

+@property (nonatomic, assign) BOOL failed;
@property (nonatomic, assign, getter=isFinished) BOOL finished;
@property (nonatomic, assign) NSTimeInterval timeLeft;

@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKAudioContentView.h"
 #import "ORKHelpers.h"
 #import "ORKSkin.h"
@@ -35,6 +36,7 @@
 #import "ORKHeadlineLabel.h"
 #import "ORKAccessibility.h"

+
 // The central blue region.
 static const CGFloat GraphViewBlueZoneHeight = 170;

@@ -53,6 +55,7 @@ static const CGFloat GraphViewRedZoneHeight = 25;

@end

+
 static const CGFloat kValueLineWidth = 4.5;
 static const CGFloat kValueLineMargin = 1.5;

@@ -61,17 +64,23 @@ static const CGFloat kValueLineMargin = 1.5;
 - (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
-        NSLayoutConstraint *c1 = [NSLayoutConstraint constraintWithItem:self
-                                                              attribute:NSLayoutAttributeWidth
-                                                              relatedBy:NSLayoutRelationEqual
-                                                                 toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:CGFLOAT_MAX];
-        c1.priority = UILayoutPriorityFittingSizeLevel;
-        NSLayoutConstraint *c2 = [NSLayoutConstraint constraintWithItem:self
+        NSLayoutConstraint *constraint1 = [NSLayoutConstraint constraintWithItem:self
+                                                                       attribute:NSLayoutAttributeWidth
+                                                                       relatedBy:NSLayoutRelationEqual
+                                                                          toItem:nil
+                                                                       attribute:NSLayoutAttributeNotAnAttribute
+                                                                      multiplier:1
+                                                                        constant:CGFLOAT_MAX];
+        constraint1.priority = UILayoutPriorityFittingSizeLevel;
+        NSLayoutConstraint *constraint2 = [NSLayoutConstraint constraintWithItem:self
                                                              attribute:NSLayoutAttributeHeight
                                                              relatedBy:NSLayoutRelationEqual
-                                                                 toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:CGFLOAT_MAX];
-        c2.priority = UILayoutPriorityFittingSizeLevel;
-        [NSLayoutConstraint activateConstraints:@[c1,c2]];
+                                                                 toItem:nil
+                                                                       attribute:NSLayoutAttributeNotAnAttribute
+                                                                      multiplier:1
+                                                                        constant:CGFLOAT_MAX];
+        constraint2.priority = UILayoutPriorityFittingSizeLevel;
+        [NSLayoutConstraint activateConstraints:@[constraint1, constraint2]];
        
 #if TARGET_IPHONE_SIMULATOR
        _values = @[@(0.2),@(0.6),@(0.55), @(0.1), @(0.75), @(0.7)];
@@ -101,39 +110,39 @@ static const CGFloat kValueLineMargin = 1.5;
 }

 - (void)drawRect:(CGRect)rect {
-    CGRect r = self.bounds;
+    CGRect bounds = self.bounds;
    
-    CGContextRef ctx = UIGraphicsGetCurrentContext();
-    CGContextSetFillColorWithColor(ctx, [UIColor whiteColor].CGColor);
-    CGContextFillRect(ctx, r);
+    CGContextRef context = UIGraphicsGetCurrentContext();
+    CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);
+    CGContextFillRect(context, bounds);
    
    CGFloat scale = [self.window.screen scale];
    
-    CGFloat midY = CGRectGetMidY(r);
-    CGFloat maxX = CGRectGetMaxX(r);
-    CGFloat halfHeight = r.size.height/2;
-    CGContextSaveGState(ctx);
+    CGFloat midY = CGRectGetMidY(bounds);
+    CGFloat maxX = CGRectGetMaxX(bounds);
+    CGFloat halfHeight = bounds.size.height/2;
+    CGContextSaveGState(context);
    {
        UIBezierPath *centerLine = [UIBezierPath new];
        [centerLine moveToPoint:(CGPoint){.x=0,.y=midY}];
        [centerLine addLineToPoint:(CGPoint){.x=maxX,.y=midY}];
        
-        CGContextSetLineWidth(ctx, 1/scale);
+        CGContextSetLineWidth(context, 1/scale);
        [_keyColor setStroke];
        CGFloat lengths[2] = {3,3};
-        CGContextSetLineDash(ctx, 0, lengths, 2);
+        CGContextSetLineDash(context, 0, lengths, 2);
        
        [centerLine stroke];
    }
-    CGContextRestoreGState(ctx);
+    CGContextRestoreGState(context);
    
    CGFloat lineStep = kValueLineMargin + kValueLineWidth;
    
-    CGContextSaveGState(ctx);
+    CGContextSaveGState(context);
    {
        CGFloat x = maxX - lineStep/2;
-        CGContextSetLineWidth(ctx, kValueLineWidth);
-        CGContextSetLineCap(ctx, kCGLineCapRound);
+        CGContextSetLineWidth(context, kValueLineWidth);
+        CGContextSetLineCap(context, kCGLineCapRound);
        
        UIBezierPath *path1 = [UIBezierPath new];
        path1.lineCapStyle = kCGLineCapRound;
@@ -143,16 +152,16 @@ static const CGFloat kValueLineMargin = 1.5;
        for (NSNumber *value in [_values reverseObjectEnumerator]) {
            CGFloat floatValue = [value doubleValue];
            
-            UIBezierPath *p = nil;
+            UIBezierPath *path = nil;
            if (floatValue > _alertThreshold) {
-                p = path1;
+                path = path1;
                [_alertColor setStroke];
            } else {
-                p = path2;
+                path = path2;
                [_keyColor setStroke];
            }
-            [p moveToPoint:(CGPoint){.x=x,.y=midY-floatValue*halfHeight}];
-            [p addLineToPoint:(CGPoint){.x=x,.y=midY+floatValue*halfHeight}];
+            [path moveToPoint:(CGPoint){.x=x,.y=midY-floatValue*halfHeight}];
+            [path addLineToPoint:(CGPoint){.x=x,.y=midY+floatValue*halfHeight}];
            
            x -= lineStep;
            
@@ -169,29 +178,29 @@ static const CGFloat kValueLineMargin = 1.5;
        [path2 stroke];
        
    }
-    CGContextRestoreGState(ctx);
-    
+    CGContextRestoreGState(context);
 }

@end

+
@interface ORKAudioTimerLabel : ORKLabel

@end

+
@implementation ORKAudioTimerLabel

 + (UIFont *)defaultFont {
-    
    UIFontDescriptor *descriptor = [UIFontDescriptor preferredFontDescriptorWithTextStyle:UIFontTextStyleSubheadline];
    UIFontDescriptor *alternativeDescriptor = ORKFontDescriptorForLightStylisticAlternative(descriptor);
    return [UIFont fontWithDescriptor:alternativeDescriptor size:[alternativeDescriptor pointSize]+4];
 }

-
@end

-@interface ORKAudioContentView()
+
+@interface ORKAudioContentView ()

@property (nonatomic, strong) ORKHeadlineLabel *alertLabel;
@property (nonatomic, strong) UILabel *timerLabel;
@@ -199,8 +208,8 @@ static const CGFloat kValueLineMargin = 1.5;

@end

-@implementation ORKAudioContentView
-{
+
+@implementation ORKAudioContentView {
    NSArray *_constraints;
    NSMutableArray *_samples;
    UIColor *_keyColor;
@@ -209,8 +218,7 @@ static const CGFloat kValueLineMargin = 1.5;
 - (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
-        CGFloat margin = ORKStandardMarginForView(self);
-        self.layoutMargins = (UIEdgeInsets){.left=2*margin,.right=2*margin};
+        self.layoutMargins = ORKStandardFullScreenLayoutMarginsForView(self);
        
        self.alertLabel = [ORKHeadlineLabel new];
        _alertLabel.translatesAutoresizingMaskIntoConstraints = NO;
@@ -243,6 +251,12 @@ static const CGFloat kValueLineMargin = 1.5;
    [self applyKeyColor];
 }

+-(void)setFailed:(BOOL)failed {
+    _failed = failed;
+    _alertLabel.text = failed ? ORKLocalizedString(@"AUDIO_GENERIC_ERROR_LABEL", nil) : ORKLocalizedString(@"AUDIO_TOO_LOUD_LABEL", nil);
+    [self updateAlertLabelHidden];
+}
+
 - (void)setFinished:(BOOL)finished {
    _finished = finished;
    [self updateAlertLabelHidden];
@@ -265,7 +279,6 @@ static const CGFloat kValueLineMargin = 1.5;

 - (void)setAlertColor:(UIColor *)alertColor {
    _alertColor = alertColor;
-    
    _alertLabel.textColor = alertColor;
    _graphView.alertColor = alertColor;
 }
@@ -281,21 +294,34 @@ static const CGFloat kValueLineMargin = 1.5;
    NSDictionary *views = NSDictionaryOfVariableBindings(_timerLabel, _alertLabel, _graphView);
    [constraints addObjectsFromArray:
     [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_graphView]-[_alertLabel]|"
-                                             options:(NSLayoutFormatOptions)0
-                                             metrics:nil views:views]];
+                                             options:0
+                                             metrics:nil
+                                               views:views]];
    [constraints addObject:[NSLayoutConstraint constraintWithItem:_alertLabel
                                                        attribute:NSLayoutAttributeCenterX
                                                        relatedBy:NSLayoutRelationEqual
                                                           toItem:self
                                                        attribute:NSLayoutAttributeCenterX
-                                                       multiplier:1 constant:0]];
+                                                       multiplier:1
+                                                         constant:0]];
+    
+    const CGFloat sideMargin = self.layoutMargins.left + (2 * ORKStandardLeftMarginForTableViewCell(self));
+    const CGFloat innerMargin = 2;
+
    [constraints addObjectsFromArray:
-     [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_graphView]-2-[_timerLabel]-|"
+     [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-sideMargin-[_graphView]-innerMargin-[_timerLabel]-sideMargin-|"
                                             options:NSLayoutFormatAlignAllCenterY
-                                             metrics:nil views:views]];
+                                             metrics:@{@"sideMargin": @(sideMargin), @"innerMargin": @(innerMargin)}
+                                               views:views]];
    
    
-    [constraints addObject:[NSLayoutConstraint constraintWithItem:_graphView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:(GraphViewBlueZoneHeight+GraphViewRedZoneHeight*2)]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_graphView
+                                                        attribute:NSLayoutAttributeHeight
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:nil
+                                                        attribute:NSLayoutAttributeNotAnAttribute
+                                                       multiplier:1
+                                                         constant:(GraphViewBlueZoneHeight+GraphViewRedZoneHeight*2)]];
    
    _constraints = constraints;
    [NSLayoutConstraint activateConstraints:constraints];
@@ -317,17 +343,16 @@ static const CGFloat kValueLineMargin = 1.5;
    static NSDateComponentsFormatter *_formatter = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
-        NSDateComponentsFormatter *fmt = [NSDateComponentsFormatter new];
-        fmt.unitsStyle = NSDateComponentsFormatterUnitsStylePositional;
-        fmt.zeroFormattingBehavior = NSDateComponentsFormatterZeroFormattingBehaviorPad;
-        fmt.allowedUnits = NSCalendarUnitMinute | NSCalendarUnitSecond;
-        _formatter = fmt;
+        NSDateComponentsFormatter *formatter = [NSDateComponentsFormatter new];
+        formatter.unitsStyle = NSDateComponentsFormatterUnitsStylePositional;
+        formatter.zeroFormattingBehavior = NSDateComponentsFormatterZeroFormattingBehaviorPad;
+        formatter.allowedUnits = NSCalendarUnitMinute | NSCalendarUnitSecond;
+        _formatter = formatter;
    });
    
-    NSString *s = [_formatter stringFromTimeInterval:MAX(round(_timeLeft),0)];
-    _timerLabel.text = s;
-    _timerLabel.hidden = (s == nil);
-    
+    NSString *string = [_formatter stringFromTimeInterval:MAX(round(_timeLeft),0)];
+    _timerLabel.text = string;
+    _timerLabel.hidden = (string == nil);    
 }

 - (void)updateGraphSamples {
@@ -337,8 +362,8 @@ static const CGFloat kValueLineMargin = 1.5;

 - (void)updateAlertLabelHidden {
    NSNumber *sample = [_samples lastObject];
-    BOOL hide = _finished || !([sample doubleValue] > _alertThreshold);
-    _alertLabel.hidden = hide;
+    BOOL show = (! _finished && ([sample doubleValue] > _alertThreshold)) || _failed;
+    _alertLabel.hidden = !show;
 }

 - (void)setSamples:(NSArray *)samples {
@@ -0,0 +1,107 @@
+/*
+ Copyright (c) 2015, Shazino SAS. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ ---
+
+ This software is based on the original source by Matt Gallagher.
+ http://www.cocoawithlove.com/2010/10/ios-tone-generator-introduction-to.html
+
+ Copyright (c) 2009-2011 Matt Gallagher. All rights reserved.
+
+ This software is provided 'as-is', without any express or implied warranty. In
+ no event will the authors be held liable for any damages arising from the use
+ of this software. Permission is granted to anyone to use this software for any
+ purpose, including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not claim
+    that you wrote the original software. If you use this software in a product,
+    an acknowledgment in the product documentation would be appreciated but is
+    not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+ */
+
+#import <ResearchKit/ORKRecorder.h>
+#import <AVFoundation/AVFoundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ The `ORKAudioGenerator` class represents an audio tone generator.
+ */
+ORK_CLASS_AVAILABLE
+@interface ORKAudioGenerator : NSObject
+
+/**
+ Plays a tone at a specific frequency in stereo.
+
+ The sound is a "pure" sinusoid tone.
+
+ @param frequency The audio frequency in hertz.
+ */
+- (void)playSoundAtFrequency:(double)frequency;
+
+/**
+ Plays a tone at a specific frequency on a specific channel, with a fade-in effect.
+
+ The sound is a "pure" sinusoid tone.
+ The fade-in effect is applied linearly for the peak amplitude, from a 0 to 1 factor.
+
+ @param frequency The audio frequency in hertz.
+ @param channel The audio channel (left or right).
+ @param duration The fade-in duration.
+ */
+- (void)playSoundAtFrequency:(double)frequency
+                   onChannel:(ORKAudioChannel)channel
+              fadeInDuration:(NSTimeInterval)duration;
+
+/**
+ Stops the audio being played.
+ */
+- (void)stop;
+
+/**
+ Returns the peak audio volume being currently played, in decibels (dB).
+
+ @return The current audio volume in decibels.
+ */
+- (double)volumeInDecibels;
+
+/**
+ Returns the peak audio volume amplitude being currently played (from 0 to 1).
+
+ @return The current audio volume amplitude.
+ */
+- (double)volumeAmplitude;
+
+@end
+
+NS_ASSUME_NONNULL_END
@@ -0,0 +1,284 @@
+/*
+ Copyright (c) 2015, Shazino SAS. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ ---
+
+ This software is based on the original source by Matt Gallagher.
+ http://www.cocoawithlove.com/2010/10/ios-tone-generator-introduction-to.html
+
+ Copyright (c) 2009-2011 Matt Gallagher. All rights reserved.
+
+ This software is provided 'as-is', without any express or implied warranty. In
+ no event will the authors be held liable for any damages arising from the use
+ of this software. Permission is granted to anyone to use this software for any
+ purpose, including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not claim
+ that you wrote the original software. If you use this software in a product,
+ an acknowledgment in the product documentation would be appreciated but is
+ not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+ */
+
+#import "ORKAudioGenerator.h"
+
+@import AudioToolbox;
+
+@interface ORKAudioGenerator () {
+    @public
+    AudioComponentInstance _toneUnit;
+
+@public
+    double _frequency;
+    double _theta;
+    ORKAudioChannel _activeChannel;
+    BOOL _playsStereo;
+    double _fadeInFactor;
+    NSTimeInterval _fadeInDuration;
+}
+
+- (void)setupAudioSession;
+- (void)createToneUnit;
+- (void)play;
+- (void)handleInterruption:(id)sender;
+
+@end
+
+
+const double ORKSineWaveToneGeneratorAmplitudeDefault = 0.03f;
+const double ORKSineWaveToneGeneratorSampleRateDefault = 44100.0f;
+
+OSStatus ORKAudioGeneratorRenderTone(void *inRefCon,
+                                     AudioUnitRenderActionFlags *ioActionFlags,
+                                     const AudioTimeStamp 		*inTimeStamp,
+                                     UInt32 					inBusNumber,
+                                     UInt32 					inNumberFrames,
+                                     AudioBufferList 			*ioData) {
+    // Fixed amplitude is good enough for our purposes
+    const double amplitude = ORKSineWaveToneGeneratorAmplitudeDefault;
+
+    // Get the tone parameters out of the view controller
+    ORKAudioGenerator *audioGenerator = (__bridge ORKAudioGenerator *)inRefCon;
+    double theta = audioGenerator->_theta;
+    double theta_increment = 2.0 * M_PI * audioGenerator->_frequency / ORKSineWaveToneGeneratorSampleRateDefault;
+
+    double fadeInFactor = audioGenerator->_fadeInFactor;
+
+    // This is a mono tone generator so we only need the first buffer
+    Float32 *bufferActive    = (Float32 *)ioData->mBuffers[audioGenerator->_activeChannel].mData;
+    Float32 *bufferNonActive = (Float32 *)ioData->mBuffers[1 - audioGenerator->_activeChannel].mData;
+
+    // Generate the samples
+    for (UInt32 frame = 0; frame < inNumberFrames; frame++) {
+        double bufferValue = sin(theta) * amplitude * pow(10, 2 * fadeInFactor - 2);
+        bufferActive[frame] = bufferValue;
+        if (audioGenerator->_playsStereo) {
+            bufferNonActive[frame] = bufferValue;
+        }
+        else {
+            bufferNonActive[frame] = 0;
+        }
+
+        theta += theta_increment;
+        if (theta > 2.0 * M_PI) {
+            theta -= 2.0 * M_PI;
+        }
+
+        fadeInFactor += 1/(ORKSineWaveToneGeneratorSampleRateDefault * audioGenerator->_fadeInDuration);
+        if (fadeInFactor >= 1) {
+            fadeInFactor = 1;
+        }
+    }
+
+    // Store the theta back in the view controller
+    audioGenerator->_theta = theta;
+    audioGenerator->_fadeInFactor = fadeInFactor;
+
+    return noErr;
+}
+
+
+@implementation ORKAudioGenerator
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        [self setupAudioSession];
+        
+        // Automatically stop and then restart audio playback when the app resigns active.
+        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationDidBecomeActive:) name:UIApplicationDidBecomeActiveNotification object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationWillResignActive:) name:UIApplicationWillResignActiveNotification object:nil];
+    }
+    return self;
+}
+
+- (void)dealloc {
+    [self stop];
+    
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
+- (void)applicationDidBecomeActive:(NSNotification *)notification {
+    if (_toneUnit) {
+        __unused OSErr err = AudioOutputUnitStart(_toneUnit);
+        NSAssert1(err == noErr, @"Error starting unit: %hd", err);
+    }
+}
+
+- (void)applicationWillResignActive:(NSNotification *)notification {
+    if (_toneUnit) {
+        __unused OSErr err = AudioOutputUnitStop(_toneUnit);
+        NSAssert1(err == noErr, @"Error stopping unit: %hd", err);
+    }
+}
+
+- (double)volumeInDecibels {
+    return 20 * log(self.volumeAmplitude);
+}
+
+- (double)volumeAmplitude {
+    return ORKSineWaveToneGeneratorAmplitudeDefault * pow(10, 2 * _fadeInFactor - 2);
+}
+
+- (void)playSoundAtFrequency:(double)playFrequency {
+    _frequency = playFrequency;
+    _fadeInFactor = 0;
+    _fadeInDuration = 0.5;
+    _playsStereo = YES;
+
+    [self play];
+}
+
+- (void)playSoundAtFrequency:(double)playFrequency
+                   onChannel:(ORKAudioChannel)playChannel
+              fadeInDuration:(NSTimeInterval)duration {
+    _frequency = playFrequency;
+    _activeChannel = playChannel;
+    _fadeInFactor = 0;
+    _fadeInDuration = duration;
+    _playsStereo = NO;
+
+    [self play];
+}
+
+- (void)play {
+    if (!_toneUnit) {
+        [self createToneUnit];
+
+        // Stop changing parameters on the unit
+        OSErr err = AudioUnitInitialize(_toneUnit);
+        NSAssert1(err == noErr, @"Error initializing unit: %hd", err);
+
+        // Start playback
+        err = AudioOutputUnitStart(_toneUnit);
+        NSAssert1(err == noErr, @"Error starting unit: %hd", err);
+    }
+}
+
+- (void)stop {
+    if (_toneUnit) {
+        AudioOutputUnitStop(_toneUnit);
+        AudioUnitUninitialize(_toneUnit);
+        AudioComponentInstanceDispose(_toneUnit);
+        _toneUnit = nil;
+    }
+}
+
+- (void)setupAudioSession {
+    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
+    BOOL ok;
+    NSError *setCategoryError = nil;
+    ok = [audioSession setCategory:AVAudioSessionCategoryPlayback error:&setCategoryError];
+    NSAssert1(ok, @"Audio error %@", setCategoryError);
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(handleInterruption:)
+                                                 name:AVAudioSessionInterruptionNotification
+                                               object:audioSession];
+}
+
+- (void)createToneUnit {
+    // Configure the search parameters to find the default playback output unit
+    // (called the kAudioUnitSubType_RemoteIO on iOS but
+    // kAudioUnitSubType_DefaultOutput on Mac OS X)
+    AudioComponentDescription defaultOutputDescription;
+    defaultOutputDescription.componentType = kAudioUnitType_Output;
+    defaultOutputDescription.componentSubType = kAudioUnitSubType_RemoteIO;
+    defaultOutputDescription.componentManufacturer = kAudioUnitManufacturer_Apple;
+    defaultOutputDescription.componentFlags = 0;
+    defaultOutputDescription.componentFlagsMask = 0;
+
+    // Get the default playback output unit
+    AudioComponent defaultOutput = AudioComponentFindNext(NULL, &defaultOutputDescription);
+    NSAssert(defaultOutput, @"Can't find default output");
+
+    // Create a new unit based on this that we'll use for output
+    OSErr err = AudioComponentInstanceNew(defaultOutput, &_toneUnit);
+    NSAssert1(_toneUnit, @"Error creating unit: %hd", err);
+
+    // Set our tone rendering function on the unit
+    AURenderCallbackStruct input;
+    input.inputProc = ORKAudioGeneratorRenderTone;
+    input.inputProcRefCon = (__bridge void *)(self);
+    err = AudioUnitSetProperty(_toneUnit,
+                               kAudioUnitProperty_SetRenderCallback,
+                               kAudioUnitScope_Input,
+                               0,
+                               &input,
+                               sizeof(input));
+    NSAssert1(err == noErr, @"Error setting callback: %hd", err);
+
+    // Set the format to 32 bit, single channel, floating point, linear PCM
+    const int four_bytes_per_float = 4;
+    const int eight_bits_per_byte = 8;
+    AudioStreamBasicDescription streamFormat;
+    streamFormat.mSampleRate = ORKSineWaveToneGeneratorSampleRateDefault;
+    streamFormat.mFormatID = kAudioFormatLinearPCM;
+    streamFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked | kAudioFormatFlagIsNonInterleaved;
+    streamFormat.mBytesPerPacket = four_bytes_per_float;
+    streamFormat.mFramesPerPacket = 1;
+    streamFormat.mBytesPerFrame = four_bytes_per_float;
+    streamFormat.mChannelsPerFrame = 2;
+    streamFormat.mBitsPerChannel = four_bytes_per_float * eight_bits_per_byte;
+    err = AudioUnitSetProperty (_toneUnit,
+                                kAudioUnitProperty_StreamFormat,
+                                kAudioUnitScope_Input,
+                                0,
+                                &streamFormat,
+                                sizeof(AudioStreamBasicDescription));
+    NSAssert1(err == noErr, @"Error setting stream format: %hd", err);
+}
+
+- (void)handleInterruption:(id)sender {
+    [self stop];
+}
+
+@end
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ORKRecorder.h>
 #import <AVFoundation/AVFoundation.h>

+
 NS_ASSUME_NONNULL_BEGIN

 /**
@@ -58,20 +60,22 @@ ORK_CLASS_AVAILABLE
 Passed to  AVAudioRecorder`'s `-initWithURL:settings:error:`
 For information on the settings available for an audio recorder, see "AV Foundation Audio Settings Constants".
 */
-@property (nonatomic, copy, readonly, nullable) NSDictionary *recorderSettings;
+@property (nonatomic, copy, readonly) NSDictionary *recorderSettings;

 /**
 Returns an initialized audio recorder using the specified settings, step, and output directory.
 
- @param recorderSettings The settings for the recording session.
- @param step The step that requested this recording.
- @param outputDirectory The directory in which the audio output should be stored.
+ @param identifier          The unique identifier of the recorder (assigned by the recorder configuration).
+ @param recorderSettings    The settings for the recording session.
+ @param step                The step that requested this recorder.
+ @param outputDirectory     The directory in which the audio output should be stored.
+ 
 @return An initialized audio recorder.
 */
- (instancetype)initWithRecorderSettings:(NSDictionary *)recorderSettings
-                                    step:(ORKStep *)step
-                         outputDirectory:(NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;
-
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                  recorderSettings:(nullable NSDictionary *)recorderSettings
+                              step:(nullable ORKStep *)step
+                   outputDirectory:(nullable NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;

 /**
 Reference to the audio recorder being used.
@@ -28,12 +28,14 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKAudioRecorder.h"
 #import "ORKHelpers.h"
 #import "ORKRecorder_Internal.h"
 #import "ORKRecorder_Private.h"
 #import "ORKDefines_Private.h"

+
@interface ORKAudioRecorder ()

@property (nonatomic, strong) AVAudioRecorder *audioRecorder;
@@ -42,41 +44,34 @@

@end

+
@implementation ORKAudioRecorder

- (void)dealloc
-{
+- (void)dealloc {
    ORK_Log_Debug(@"Remove audiorecorder %p", self);
    [_audioRecorder stop];
    _audioRecorder = nil;
 }

-
-+ (NSDictionary *)defaultRecorderSettings
-{
-    return [NSDictionary
-            dictionaryWithObjectsAndKeys:
-            @(kAudioFormatMPEG4AAC), AVFormatIDKey,
-            @(AVAudioQualityMin), AVEncoderAudioQualityKey,
-            @(2), AVNumberOfChannelsKey,
-            @(44100.0), AVSampleRateKey,
-            nil];
+ (NSDictionary *)defaultRecorderSettings {
+    return @{AVFormatIDKey              : @(kAudioFormatMPEG4AAC),
+             AVEncoderAudioQualityKey   : @(AVAudioQualityMin),
+             AVNumberOfChannelsKey      : @(2),
+             AVSampleRateKey            : @(44100.0)};
 }

- (instancetype)initWithRecorderSettings:(NSDictionary *)recorderSettings
-                                    step:(ORKStep *)step
-                         outputDirectory:(NSURL *)outputDirectory
-{
-    self = [super initWithStep:step outputDirectory:outputDirectory];
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                  recorderSettings:(NSDictionary *)recorderSettings
+                              step:(ORKStep *)step
+                   outputDirectory:(NSURL *)outputDirectory {
+    self = [super initWithIdentifier:identifier step:step outputDirectory:outputDirectory];
    if (self) {
        
        self.continuesInBackground = YES;
-        if (! recorderSettings)
-        {
+        if (! recorderSettings) {
            recorderSettings = [[self class] defaultRecorderSettings];
        }
-        if (! [recorderSettings isKindOfClass:[NSDictionary class]])
-        {
+        if (! [recorderSettings isKindOfClass:[NSDictionary class]]) {
            @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"recorderSettings should be a dictionary" userInfo:recorderSettings];
        }
        self.recorderSettings = recorderSettings;
@@ -85,7 +80,9 @@
 }

 - (void)start {
-    
+    if (self.outputDirectory == nil) {
+        @throw [NSException exceptionWithName:NSDestinationInvalidException reason:@"audioRecorder requires an output directory" userInfo:nil];
+    }
    // Only create the file when we should actually start recording.
    if (! _audioRecorder) {
        
@@ -103,7 +100,6 @@
            return;
        }
        
-        
        ORK_Log_Debug(@"Create audioRecorder %p", self);
        _audioRecorder = [[AVAudioRecorder alloc]
                          initWithURL:soundFileURL
@@ -115,16 +111,14 @@
        }
        
 #if ! TARGET_IPHONE_SIMULATOR
-        if (!_audioRecorder.recording)
-        {
+        if (!_audioRecorder.recording) {
            [_audioRecorder prepareToRecord];
        }
 #endif
    }
    
 #if ! TARGET_IPHONE_SIMULATOR
-    if (!_audioRecorder.recording)
-    {
+    if (!_audioRecorder.recording) {
        [_audioRecorder prepareToRecord];
        [_audioRecorder record];
    }
@@ -136,7 +130,6 @@
 - (void)stop {
    if (! _audioRecorder) {
        // Error has already been returned.
-        
        return;
    }
    
@@ -161,43 +154,39 @@
    unsigned int recorderFormat = [recorderSettings[AVFormatIDKey] unsignedIntValue];
    
    NSString *contentType = @"audio";
-    switch (recorderFormat)
-    {
-        case kAudioFormatLinearPCM:
-        {
+    switch (recorderFormat) {
+        case kAudioFormatLinearPCM: {
            int numBits = [recorderSettings[AVLinearPCMBitDepthKey] intValue] ? : 16;
            contentType = [NSString stringWithFormat:@"audio/L%d", numBits];
            break;
        }
-        case kAudioFormatAC3:
+        case kAudioFormatAC3: {
            contentType = @"audio/ac3";
            break;
+        }
        case kAudioFormatMPEG4AAC:
        case kAudioFormatMPEG4CELP:
        case kAudioFormatMPEG4HVXC:
        case kAudioFormatMPEG4TwinVQ:
-        case kAudioFormatAppleLossless:
+        case kAudioFormatAppleLossless: {
            contentType = @"audio/m4a";
            break;
-        case kAudioFormatULaw:
+        }
+        case kAudioFormatULaw: {
            contentType = @"audio/basic";
            break;
+        }
    }
-    
    return contentType;
-    
 }

-
- (NSString *)recorderType
-{
+- (NSString *)recorderType {
    return @"audio";
 }

- (void)doStopRecording
-{
+- (void)doStopRecording {
    if (self.isRecording) {
-#if ! TARGET_IPHONE_SIMULATOR
+#if !TARGET_IPHONE_SIMULATOR
        [_audioRecorder stop];
        
        [self applyFileProtection:ORKFileProtectionComplete toFileAtURL:[self recordingFileURL]];
@@ -205,48 +194,44 @@
    }
 }

- (void)finishRecordingWithError:(NSError *)error
-{
+- (void)finishRecordingWithError:(NSError *)error {
    [self doStopRecording];
    
    [super finishRecordingWithError:error];
 }

- (NSString *)extension
-{
+- (NSString *)extension {
    NSDictionary *recorderSettings = [self recorderSettings];
    unsigned int recorderFormat = [recorderSettings[AVFormatIDKey] unsignedIntValue];
    
    NSString *extension = @"au";
-    switch (recorderFormat)
-    {
+    switch (recorderFormat) {
        case kAudioFormatLinearPCM:
        {
            extension = @"pcm";
            break;
        }
-        case kAudioFormatAC3:
+        case kAudioFormatAC3: {
            extension = @"ac3";
            break;
+        }
        case kAudioFormatMPEG4AAC:
        case kAudioFormatMPEG4CELP:
        case kAudioFormatMPEG4HVXC:
        case kAudioFormatMPEG4TwinVQ:
-        case kAudioFormatAppleLossless:
+        case kAudioFormatAppleLossless: {
            extension = @"m4a";
            break;
+        }
    }
    return extension;
 }

- (NSURL *)recordingFileURL
-{
+- (NSURL *)recordingFileURL {
    return [[self recordingDirectoryURL] URLByAppendingPathComponent:[NSString stringWithFormat:@"%@.%@", [self logName], [self extension]]];
 }

-
- (BOOL)recreateFileWithError:(NSError * __autoreleasing *)error
-{
+- (BOOL)recreateFileWithError:(NSError * __autoreleasing *)error {
    NSURL *url = [self recordingFileURL];
    if (! url) {
        if (error) {
@@ -255,34 +240,34 @@
        return NO;
    }
    
-    NSFileManager *fm = [NSFileManager defaultManager];
+    NSFileManager *fileManager = [NSFileManager defaultManager];
    
-    if (! [fm createDirectoryAtURL:url withIntermediateDirectories:YES attributes:nil error:error]) {
+    if (! [fileManager createDirectoryAtURL:url withIntermediateDirectories:YES attributes:nil error:error]) {
        return NO;
    }
    
-    if ([fm fileExistsAtPath:[url path]]) {
-        if (! [fm removeItemAtPath:[url path] error:error]) {
+    if ([fileManager fileExistsAtPath:[url path]]) {
+        if (! [fileManager removeItemAtPath:[url path] error:error]) {
            return NO;
        }
    }
    
-    [fm createFileAtPath:[url path] contents:nil attributes:nil];
-    [fm setAttributes:@{NSFileProtectionKey : ORKFileProtectionFromMode(ORKFileProtectionCompleteUnlessOpen)} ofItemAtPath:[url path] error:error];
+    [fileManager createFileAtPath:[url path] contents:nil attributes:nil];
+    [fileManager setAttributes:@{NSFileProtectionKey : ORKFileProtectionFromMode(ORKFileProtectionCompleteUnlessOpen)} ofItemAtPath:[url path] error:error];
    return YES;
 }

-
 - (void)reset {
    [_audioRecorder stop];
    _audioRecorder = nil;
    [super reset];
 }

-
@end

+
@interface ORKAudioRecorderConfiguration ()
+
@end


@@ -290,13 +275,15 @@

 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wobjc-designated-initializers"
- (instancetype)initWithRecorderSettings:(NSDictionary *)recorderSettings
-{
-    self = [self ork_init];
-    if (self)
-    {
-        if (recorderSettings && ! [recorderSettings isKindOfClass:[NSDictionary class]])
-        {
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    @throw [NSException exceptionWithName:NSGenericException reason:@"Use subclass designated initializer" userInfo:nil];
+}
+
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                  recorderSettings:(NSDictionary *)recorderSettings {
+    self = [super initWithIdentifier:identifier];
+    if (self) {
+        if (recorderSettings && ! [recorderSettings isKindOfClass:[NSDictionary class]]) {
            @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"recorderSettings should be a dictionary" userInfo:recorderSettings];
        }
        _recorderSettings = recorderSettings;
@@ -306,31 +293,27 @@
 #pragma clang diagnostic pop

 - (ORKRecorder *)recorderForStep:(ORKStep *)step
-                outputDirectory:(NSURL *)outputDirectory
-{
-    return [[ORKAudioRecorder alloc] initWithRecorderSettings:(NSDictionary *__nonnull)self.recorderSettings
-                                                        step:step
-                                             outputDirectory:outputDirectory];
+                 outputDirectory:(NSURL *)outputDirectory {
+    return [[ORKAudioRecorder alloc] initWithIdentifier:self.identifier
+                                       recorderSettings:self.recorderSettings
+                                                   step:step
+                                        outputDirectory:outputDirectory];
 }

- (instancetype)initWithCoder:(NSCoder *)aDecoder
-{
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
-    if (self)
-    {
+    if (self) {
        ORK_DECODE_OBJ_CLASS(aDecoder, recorderSettings, NSDictionary);
    }
    return self;
 }

- (void)encodeWithCoder:(NSCoder *)aCoder
-{
+- (void)encodeWithCoder:(NSCoder *)aCoder {
    [super encodeWithCoder:aCoder];
    ORK_ENCODE_OBJ(aCoder, recorderSettings);
 }

-+ (BOOL)supportsSecureCoding
-{
+ (BOOL)supportsSecureCoding {
    return YES;
 }

@@ -339,12 +322,11 @@
    
    __typeof(self) castObject = object;
    return (isParentSame &&
-            ORKEqualObjects(self.recorderSettings, castObject.recorderSettings)) ;
+            ORKEqualObjects(self.recorderSettings, castObject.recorderSettings));
 }

-
 - (ORKPermissionMask)requestedPermissionMask {
    return ORKPermissionAudioRecording;
 }

-@end
+@end
@@ -28,15 +28,15 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ORKActiveStep.h>

+
 NS_ASSUME_NONNULL_BEGIN

 ORK_CLASS_AVAILABLE
@interface ORKAudioStep : ORKActiveStep

-@property (nonatomic, assign) NSTimeInterval duration;
-
@end

-NS_ASSUME_NONNULL_END
+NS_ASSUME_NONNULL_END
@@ -28,69 +28,39 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKAudioStep.h"
 #import "ORKAudioStepViewController.h"
 #import "ORKHelpers.h"
 #import "ORKStep_Private.h"

+
@implementation ORKAudioStep

 + (Class)stepViewControllerClass {
    return [ORKAudioStepViewController class];
 }

+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    self = [super initWithIdentifier:identifier];
+    if (self) {
+        self.shouldShowDefaultTimer = NO;
+    }
+    return self;
+}
+
 - (void)validateParameters {
-    
    [super validateParameters];
    
    NSTimeInterval const ORKAudioTaskMinimumDuration = 5.0;
    
-    if ( self.duration < ORKAudioTaskMinimumDuration)
-    {
+    if ( self.stepDuration < ORKAudioTaskMinimumDuration) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"duration can not be shorter than %@ seconds.", @(ORKAudioTaskMinimumDuration)]  userInfo:nil];
    }
 }

- (instancetype)copyWithZone:(NSZone *)zone
-{
-    ORKAudioStep *step = [super copyWithZone:zone];
-    step.duration = self.duration;
-    return step;
-}
-
 - (BOOL)startsFinished {
    return NO;
 }

- (instancetype)initWithCoder:(NSCoder *)aDecoder
-{
-    self = [super initWithCoder:aDecoder];
-    if (self)
-    {
-        ORK_DECODE_DOUBLE(aDecoder, duration);
-    }
-    return self;
-}
-
- (void)encodeWithCoder:(NSCoder *)aCoder
-{
-    [super encodeWithCoder:aCoder];
-    ORK_ENCODE_DOUBLE(aCoder, duration);
-}
-
-+ (BOOL)supportsSecureCoding
-{
-    return YES;
-}
-
-
- (BOOL)isEqual:(id)object {
-    BOOL isParentSame = [super isEqual:object];
-    
-    __typeof(self) castObject = object;
-    return (isParentSame &&
-            (self.duration == castObject.duration)) ;
-}
-
-
@end
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit_Private.h>

+
 NS_ASSUME_NONNULL_BEGIN

 ORK_CLASS_AVAILABLE
@@ -37,4 +39,4 @@ ORK_CLASS_AVAILABLE

@end

-NS_ASSUME_NONNULL_END
+NS_ASSUME_NONNULL_END
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKAudioStepViewController.h"
 #import "ORKAudioContentView.h"
 #import "ORKActiveStepViewController_Internal.h"
@@ -41,22 +42,22 @@
 #import "ORKActiveStepView.h"
 #import "ORKCustomStepView_Internal.h"

+
@interface ORKAudioStepViewController ()

@property (nonatomic, strong) AVAudioRecorder *avAudioRecorder;

@end

-@implementation ORKAudioStepViewController
-{
+
+@implementation ORKAudioStepViewController {
    ORKAudioContentView *_audioContentView;
    ORKAudioRecorder *_audioRecorder;
-    
    ORKActiveStepTimer *_timer;
+    NSError *_audioRecorderError;
 }

 - (instancetype)initWithStep:(ORKStep *)step {
-    
    self = [super initWithStep:step];
    if (self) {
        // Continue audio recording in the background
@@ -68,15 +69,13 @@
 - (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
-    
    _audioContentView = [ORKAudioContentView new];
-    _audioContentView.timeLeft = self.audioStep.duration;
+    _audioContentView.timeLeft = self.audioStep.stepDuration;
    self.activeStepView.activeCustomView = _audioContentView;
 }

 - (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
-    
    [self start];
 }

@@ -93,7 +92,6 @@
            break;
        }
    }
-    
    _audioRecorder = audioRecorder;
    [self audioRecorderDidChange];
 }
@@ -103,26 +101,26 @@
 }

 - (void)doSample {
+    if (_audioRecorderError) {
+        return;
+    }
    [_avAudioRecorder updateMeters];
    float value = [_avAudioRecorder averagePowerForChannel:0];
-    
    // Assume value is in range roughly -60dB to 0dB
    float clampedValue = MAX(value/60.0, -1) + 1;
-    
    [_audioContentView addSample:@(clampedValue)];
    _audioContentView.timeLeft = [_timer duration] - [_timer runtime];
 }

 - (void)startNewTimerIfNeeded {
    if (! _timer) {
-        
-        NSTimeInterval duration = self.audioStep.duration;
+        NSTimeInterval duration = self.audioStep.stepDuration;
        __weak typeof(self) weakSelf = self;
        _timer = [[ORKActiveStepTimer alloc] initWithDuration:duration interval:duration/100 runtime:0 handler:^(ORKActiveStepTimer *timer, BOOL finished) {
            typeof(self) strongSelf = weakSelf;
            [strongSelf doSample];
            if (finished) {
-                [self finish];
+                [strongSelf finish];
            }
        }];
        [_timer resume];
@@ -130,16 +128,15 @@
    _audioContentView.finished = NO;
 }

-
 - (void)start {
    [super start];
    [self audioRecorderDidChange];
-    
    [_timer reset];
    _timer = nil;
    [self startNewTimerIfNeeded];
    
 }
+
 - (void)suspend {
    [super suspend];
    [_timer pause];
@@ -147,13 +144,18 @@
        [_audioContentView addSample:@(0)];
    }
 }
+
 - (void)resume {
    [super resume];
    [self audioRecorderDidChange];
    [self startNewTimerIfNeeded];
    [_timer resume];
 }
+
 - (void)finish {
+    if (_audioRecorderError) {
+        return;
+    }
    [super finish];
    [_timer reset];
    _timer = nil;
@@ -166,7 +168,12 @@
 - (void)setAvAudioRecorder:(AVAudioRecorder *)recorder {
    _avAudioRecorder = nil;
    _avAudioRecorder = recorder;
-    
+}
+
+- (void) recorder:(ORKRecorder *)recorder didFailWithError:(NSError *)error {
+    [super recorder:recorder didFailWithError:error];
+    _audioRecorderError = error;
+    _audioContentView.failed = YES;
 }

@end
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit.h>
 #import <ResearchKit/ORKActiveStep.h>

+
 /**
 The `ORKCountdownStep` class represents a step that displays a label and a
 countdown for a time equal to its duration.
@@ -28,18 +28,18 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKCountdownStep.h"
 #import "ORKCountdownStepViewController.h"

+
@implementation ORKCountdownStep

-+ (Class)stepViewControllerClass
-{
+ (Class)stepViewControllerClass {
    return [ORKCountdownStepViewController class];
 }

- (instancetype)initWithIdentifier:(NSString *)identifier
-{
+- (instancetype)initWithIdentifier:(NSString *)identifier {
    self = [super initWithIdentifier:identifier];
    if (self) {
        self.shouldStartTimerAutomatically = YES;
@@ -56,8 +56,7 @@
    
    NSTimeInterval const ORKCountdownStepMinimumDuration = 3.0;
    
-    if ( self.stepDuration < ORKCountdownStepMinimumDuration)
-    {
+    if ( self.stepDuration < ORKCountdownStepMinimumDuration) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"duration can not be shorter than %@ seconds.", @(ORKCountdownStepMinimumDuration)]  userInfo:nil];
    }
    
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit_Private.h>

+
 /**
 The `ORKCountdownStepViewController` class represents the step view controller that corresponds to an `ORKCountdownStep`.
 
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKCountdownStepViewController.h"
 #import "ORKCustomStepView_Internal.h"
 #import "ORKActiveStepViewController_internal.h"
@@ -41,6 +42,7 @@
 #import "ORKAccessibility.h"
 #import "ORKActiveStepView.h"

+
@interface ORKCountDownViewLabel : ORKLabel

@end
@@ -51,6 +53,7 @@
 }
@end

+
@interface ORKCountdownView : ORKActiveStepCustomView

@property (nonatomic, strong) ORKSubheadlineLabel *textLabel;
@@ -61,15 +64,14 @@

@end

+
@implementation ORKCountdownView {
    CAShapeLayer *_circleLayer;
 }

- (instancetype)init
-{
+- (instancetype)init {
    self = [super init];
    if (self) {
-        
        _textLabel = [ORKSubheadlineLabel new];
        _textLabel.textAlignment = NSTextAlignmentCenter;
        _textLabel.translatesAutoresizingMaskIntoConstraints = NO;
@@ -93,9 +95,18 @@
        
        NSDictionary *views = NSDictionaryOfVariableBindings(_textLabel, _timeLabel, _progressView);
        
-        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_textLabel]-(>=0)-[_progressView(==d)]|" options:NSLayoutFormatDirectionLeadingToTrailing|NSLayoutFormatAlignAllCenterX metrics:metrics views:views]];
-        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-(>=0)-[_textLabel]-(>=0)-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:metrics views:views]];
-        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-(>=0)-[_progressView(==d)]-(>=0)-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:metrics views:views]];
+        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_textLabel]-(>=0)-[_progressView(==d)]|"
+                                                                     options:NSLayoutFormatDirectionLeadingToTrailing|NSLayoutFormatAlignAllCenterX
+                                                                     metrics:metrics
+                                                                       views:views]];
+        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-(>=0)-[_textLabel]-(>=0)-|"
+                                                                     options:NSLayoutFormatDirectionLeadingToTrailing
+                                                                     metrics:metrics
+                                                                       views:views]];
+        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-(>=0)-[_progressView(==d)]-(>=0)-|"
+                                                                     options:NSLayoutFormatDirectionLeadingToTrailing
+                                                                     metrics:metrics
+                                                                       views:views]];
        [self addConstraint:[NSLayoutConstraint constraintWithItem:_progressView
                                                         attribute:NSLayoutAttributeCenterX
                                                         relatedBy:NSLayoutRelationEqual
@@ -134,13 +145,11 @@
        _circleLayer.strokeColor = self.tintColor.CGColor;
        _circleLayer.lineWidth = 1;
        
-        
        [_progressView.layer.sublayers makeObjectsPerformSelector:@selector(removeFromSuperlayer)];
        [_progressView.layer addSublayer:_circleLayer];
        
        _textLabel.isAccessibilityElement = NO;
        _timeLabel.isAccessibilityElement = NO;
-        
    }
    return self;
 }
@@ -150,7 +159,6 @@
 }

 - (void)startAnimateWithDuration:(NSTimeInterval)duration {
-    
    CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"strokeEnd"];
    animation.duration = duration*2;
    animation.removedOnCompletion = YES;
@@ -158,7 +166,6 @@
    animation.keyTimes =  @[@(0.0), @(0.5), @(1.0)];
    animation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
    [_circleLayer addAnimation:animation forKey:@"drawCircleAnimation"];
-
 }

 #pragma mark Accessibility
@@ -184,12 +191,12 @@

@end

+
@implementation ORKCountdownStepViewController {
    NSInteger _countDown;
 }

 - (instancetype)initWithStep:(ORKStep *)step {
-    
    self = [super initWithStep:step];
    if (self) {
        self.suspendIfInactive = NO;
@@ -226,7 +233,6 @@
 }

 - (void)countDownTimerFired:(ORKActiveStepTimer *)timer finished:(BOOL)finished {
-
    _countDown = MAX((_countDown-1), 0);
    [self updateCountdownLabel];
    
@@ -240,17 +246,13 @@
                                                              [super countDownTimerFired:timer finished:finished];
                                                          }];
            UIAccessibilityPostNotification(UIAccessibilityAnnouncementNotification, ORKLocalizedString(@"AX_ANNOUNCE_BEGIN_TASK", nil));
-        }
-        else {
+        } else {
            UIAccessibilityPostNotification(UIAccessibilityAnnouncementNotification, [@(_countDown) stringValue]);
            [super countDownTimerFired:timer finished:finished];
        }
-    }
-    else
-    {
+    } else {
        [super countDownTimerFired:timer finished:finished];
    }
 }

-
@end
@@ -32,6 +32,7 @@
 #import <Foundation/Foundation.h>
 #import <ResearchKit/ORKDefines.h>

+
 NS_ASSUME_NONNULL_BEGIN

@class ORKDataLogger;
@@ -94,14 +95,12 @@ ORK_CLASS_AVAILABLE
 /**
 Returns a data logger with an `ORKJSONLogFormatter`.
 
- @param url The URL of the directory in which to place log files.
- @param logName The prefix on the log file name in an ASCII string. Note that
-   the string must not contain the hyphen character ("-"), because a hyphen is used as a separator in the log naming scheme.
- @param delegate  The initial delegate. May be `nil`.
+ @param url         The URL of the directory in which to place log files.
+ @param logName     The prefix on the log file name in an ASCII string. Note that the string must not contain the hyphen character ("-"), because a hyphen is used as a separator in the log naming scheme.
+ @param delegate    The initial delegate. May be `nil`.
 */
 + (ORKDataLogger *)JSONDataLoggerWithDirectory:(NSURL *)url logName:(NSString *)logName delegate:(nullable id<ORKDataLoggerDelegate>)delegate;

-
 /**
 Returns an initialized data logger using the specified URL, log name, formatter, and delegate.
 
@@ -110,6 +109,7 @@ ORK_CLASS_AVAILABLE
 the string must not contain the hyphen character ("-"), because a hyphen is used as a separator in the log naming scheme.
 @param formatter   The type of formatter to use for the log, such as `ORKJSONLogFormatter`.
 @param delegate    The initial delegate. May be `nil`.
+ 
 @return An initialized data logger.
 */
 - (instancetype)initWithDirectory:(NSURL *)url logName:(NSString *)logName formatter:(ORKLogFormatter *)formatter delegate:(nullable id<ORKDataLoggerDelegate>)delegate NS_DESIGNATED_INITIALIZER;
@@ -160,7 +160,8 @@ ORK_CLASS_AVAILABLE
 than through this object.
 
 @param block   The block to call during enumeration.
- @param error   Any error detected during the enumeration
+ @param error   Any error detected during the enumeration.
+ 
 @return `YES` if the enumeration was successful; otherwise, `NO`.
 */
 - (BOOL)enumerateLogs:(void (^)(NSURL *logFileUrl, BOOL *stop))block error:(NSError * __autoreleasing *)error;
@@ -174,7 +175,8 @@ ORK_CLASS_AVAILABLE
 than through this object.
 
 @param block   The block to call during enumeration.
- @param error   Any error detected during the enumeration
+ @param error   Any error detected during the enumeration.
+ 
 @return `YES` if the enumeration was successful; otherwise, `NO`.
 */
 - (BOOL)enumerateLogsNeedingUpload:(void (^)(NSURL *logFileUrl, BOOL *stop))block error:(NSError * __autoreleasing *)error;
@@ -188,7 +190,8 @@ ORK_CLASS_AVAILABLE
 than through this object.
 
 @param block   The block to call during enumeration.
- @param error   Any error detected during the enumeration
+ @param error   Any error detected during the enumeration.
+ 
 @return `YES` if the enumeration was successful; otherwise, `NO`.
 */
 - (BOOL)enumerateLogsAlreadyUploaded:(void (^)(NSURL *logFileUrl, BOOL *stop))block error:(NSError * __autoreleasing *)error;
@@ -204,6 +207,7 @@ ORK_CLASS_AVAILABLE
 
 @param object Should be an object of a class that is accepted by the logFormatter.
 @param error  Error output, if the append fails.
+ 
 @return `YES` if appending succeeds; otherwise, `NO`.
 */
 - (BOOL)append:(id)object error:(NSError * __autoreleasing *)error;
@@ -216,6 +220,7 @@ ORK_CLASS_AVAILABLE
 
 @param objects An array of objects of a class that is accepted by the logFormatter.
 @param error  Error output, if the append fails.
+ 
 @return `YES` if appending succeeds; otherwise, `NO`.
 */
 - (BOOL)appendObjects:(NSArray *)objects error:(NSError * __nullable __autoreleasing *)error;
@@ -224,6 +229,7 @@ ORK_CLASS_AVAILABLE
 Checks whether a file has been marked as uploaded.
 
 @param url     The URL to check.
+ 
 @return `YES` if the uploaded attribute has been set on the file and the file exists; otherwise,
         `NO`.
 */
@@ -240,6 +246,7 @@ ORK_CLASS_AVAILABLE
 @param uploaded    A Boolean value that indicates whether to mark the file uploaded or not uploaded.
 @param url         The URL to mark.
 @param error       The error that occurred, if the operation fails.
+ 
 @return `YES` if adding or removing the attribute succeeded; otherwise, `NO`.
 */
 - (BOOL)markFileUploaded:(BOOL)uploaded atURL:(NSURL *)url error:(NSError * __nullable __autoreleasing *)error;
@@ -253,6 +260,7 @@ ORK_CLASS_AVAILABLE
 
 @param fileURLs    The array of files that should be removed.
 @param error       The error that occurred, if the operation fails.
+ 
 @return `YES` if removing the files succeeded; otherwise, `NO`.
 */
 - (BOOL)removeUploadedFiles:(NSArray *)fileURLs withError:(NSError * __nullable __autoreleasing *)error;
@@ -261,13 +269,14 @@ ORK_CLASS_AVAILABLE
 Removes all files managed by this logger (files that have the `logName` prefix).
 
 @param error       The error that occurred, if operation fails.
+ 
 @return `YES` if removing the files succeeded.; otherwise, `NO`.
 */
 - (BOOL)removeAllFilesWithError:(NSError *__nullable __autoreleasing *)error;

-
@end

+
 /**
 The `ORKLogFormatter` class represents the base (default) log formatter, which appends data
 blindly to a log file.
@@ -285,6 +294,7 @@ ORK_CLASS_AVAILABLE
 Returns a Boolean value that indicates whether the log formatter can serialize the specified type of object.
 
 @param c       The class of object to serialize.
+ 
 @return `YES` if the log formatter can serialize this object class; otherwise, `NO`.
 */
 - (BOOL)canAcceptLogObjectOfClass:(Class)c;
@@ -293,6 +303,7 @@ ORK_CLASS_AVAILABLE
 Returns a Boolean value that indicates whether the log formatter can serialize the specified type of object.
 
 @param object       The object to serialize.
+ 
 @return `YES` if the log formatter can serialize `object`; otherwise, `NO`
 */
 - (BOOL)canAcceptLogObject:(id)object;
@@ -304,6 +315,7 @@ ORK_CLASS_AVAILABLE
 
 @param fileHandle      The file handle to which to write.
 @param error           The error output, on failure.
+ 
 @return  `YES` if the write succeeds; otherwise, `NO`.
 */
 - (BOOL)beginLogWithFileHandle:(NSFileHandle *)fileHandle error:(NSError * __nullable __autoreleasing *)error;
@@ -314,6 +326,7 @@ ORK_CLASS_AVAILABLE
 @param object          The object to write.
 @param fileHandle      The file handle to which to write.
 @param error           The error output, on failure.
+ 
 @return `YES` if the write succeeds; otherwise, `NO`.
 */
 - (BOOL)appendObject:(id)object fileHandle:(NSFileHandle *)fileHandle error:(NSError * __nullable __autoreleasing *)error;
@@ -324,12 +337,14 @@ ORK_CLASS_AVAILABLE
 @param objects         The objects to write.
 @param fileHandle      The file handle to which to write.
 @param error           The error output, on failure.
+ 
 @return  `YES` if the write succeeds; otherwise, `NO`.
 */
 - (BOOL)appendObjects:(NSArray *)objects fileHandle:(NSFileHandle *)fileHandle error:(NSError * __nullable __autoreleasing *)error;

@end

+
 /**
 The `ORKJSONLogFormatter` class represents a log formatter for producing JSON output.
 
@@ -352,7 +367,6 @@ ORK_CLASS_AVAILABLE
 The `ORKDataLoggerManagerDelegate` protocol defines methods a delegate can implement to receive notifications
 when the data loggers managed by a `ORKDataLoggerManager` reach a certain file size threshold.
 */
-
 ORK_CLASS_AVAILABLE
@protocol ORKDataLoggerManagerDelegate <NSObject>

@@ -377,6 +391,7 @@ ORK_CLASS_AVAILABLE

@end

+
 /**
 The `ORKDataLoggerManager` class represents a manager for multiple `ORKDataLogger` instances,
 which tracks the total size of log files produced and can notify its delegate
@@ -415,6 +430,7 @@ ORK_CLASS_AVAILABLE
 
 @param directory       The file URL of the directory where the data loggers should coexist.
 @param delegate        The delegate to receive notifications.
+ 
 @return An initialized data logger manager.
 */
 - (instancetype)initWithDirectory:(NSURL *)directory delegate:(nullable id<ORKDataLoggerManagerDelegate>)delegate NS_DESIGNATED_INITIALIZER;
@@ -440,6 +456,7 @@ ORK_CLASS_AVAILABLE
 This method throws an exception if a logger already exists with the specified log name.
 
 @param logName     The log name prefix for the data logger.
+ 
 @return The `ORKDataLogger` object that was added.
 */
 - (ORKDataLogger *)addJSONDataLoggerForLogName:(NSString *)logName;
@@ -449,6 +466,7 @@ ORK_CLASS_AVAILABLE
 
 @param logName     The log name prefix for the data logger.
 @param formatter   The log formatter instance to use for this logger.
+ 
 @return The `ORKDataLogger` object that was added, or the existing one if one already existed for
 that log name.
 */
@@ -458,6 +476,7 @@ ORK_CLASS_AVAILABLE
 Retrieves the already existing data logger for a log name.
 
 @param logName     The log name prefix for the data logger.
+ 
 @return The `ORKDataLogger` object that was retrieved, or `nil` if one already existed for that log name.
 */
 - (nullable ORKDataLogger *)dataLoggerForLogName:(NSString *)logName;
@@ -479,6 +498,7 @@ ORK_CLASS_AVAILABLE
 
 @param block       The block to call during enumeration.
 @param error       The error, on failure.
+ 
 @return `YES` if the enumeration succeeds; otherwise, `NO`.
 */
 - (BOOL)enumerateLogsNeedingUpload:(void (^)(ORKDataLogger *dataLogger, NSURL *logFileUrl, BOOL *stop))block error:(NSError * __autoreleasing *)error;
@@ -489,8 +509,9 @@ ORK_CLASS_AVAILABLE
 Use this method to indicate that the specified files should no longer be marked uploaded (for example, because
 the upload did not succeed).
 
- @param fileURLs     The array of file URLs that should no longer be marked uploaded.
+ @param fileURLs    The array of file URLs that should no longer be marked uploaded.
 @param error       The error, on failure.
+ 
 @return `YES` if the operation succeeds; otherwise, `NO`.
 */
 - (BOOL)unmarkUploadedFiles:(NSArray *)fileURLs error:(NSError * __nullable __autoreleasing *)error;
@@ -502,8 +523,9 @@ ORK_CLASS_AVAILABLE
 that may relate to any of the data loggers. It is an error to pass a URL which would not
 belong to one of the loggers managed by this manager.
 
- @param fileURLs     The array of file URLs that should be removed.
+ @param fileURLs    The array of file URLs that should be removed.
 @param error       The error, on failure.
+ 
 @return `YES` if the operation succeeds; otherwise, `NO`.
 */
 - (BOOL)removeUploadedFiles:(NSArray *)fileURLs error:(NSError * __nullable __autoreleasing *)error;
@@ -514,16 +536,13 @@ ORK_CLASS_AVAILABLE
 This method removes uploaded logs first, followed by the oldest log files across
 all of the data loggers, until the total usage falls below a threshold.
 
- @param bytes       The threshold down to which to remove old log files. File
-                    removal stops when the total bytes managed by all the data
-                    loggers reaches this threshold.
+ @param bytes       The threshold down to which to remove old log files. File removal stops when the total bytes managed by all the data loggers reaches this threshold.
 @param error       The error, on failure.
+ 
 @return `YES` if the operation succeeds; otherwise, `NO`.
 */
 - (BOOL)removeOldAndUploadedLogsToThreshold:(unsigned long long)bytes error:(NSError * __nullable __autoreleasing *)error;

@end

-
 NS_ASSUME_NONNULL_END
-
@@ -31,25 +31,32 @@

 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN
+
 /*
 Exposing a minimal set of extra facilities to permit unit testing.
 */
+@interface ORKDataLogger ()

-
-@interface ORKDataLogger()
 - (nullable NSFileHandle *)fileHandle;
+
@end

+
@protocol ORKDataLoggerExtendedDelegate <ORKDataLoggerDelegate>
+
@optional
 - (void)dataLoggerThresholdsDidChange:(ORKDataLogger *)dataLogger;
+
@end


@interface NSURL (ORKDataLogger)
+
 - (BOOL)ork_isUploaded;
 - (BOOL)ork_setUploaded:(BOOL)uploaded error:(NSError * __autoreleasing *)error;
+
@end

 NS_ASSUME_NONNULL_END
@@ -30,6 +30,18 @@

 #import <ResearchKit/ORKRecorder.h>

+NS_ASSUME_NONNULL_BEGIN
+
+@class CMDeviceMotion;
+
+@protocol ORKDeviceMotionRecorderDelegate <ORKRecorderDelegate>
+
+@optional
+
+- (void)deviceMotionRecorderDidUpdateWithMotion:(CMDeviceMotion *)motion;
+
+@end
+
 /**
 The `ORKDeviceMotionRecorder` class represents a recorder that requests and collects device motion data from CoreMotion at a fixed frequency.
 
@@ -40,18 +52,25 @@ ORK_CLASS_AVAILABLE
@interface ORKDeviceMotionRecorder : ORKRecorder

 /**
- * The frequency of motion data collection from CoreMotion in hertz (Hz).
+ The frequency of motion data collection from CoreMotion in hertz (Hz).
 */
@property (nonatomic, readonly) double frequency;

 /**
 Returns an initialized device motion recorder using the specified frequency.
 
- @param frequency    The frequency of motion data collection from CoreMotion in hertz (Hz).
+ @param identifier          The unique identifier of the recorder (assigned by the recorder configuration).
+ @param frequency           The frequency of motion data collection from CoreMotion in hertz (Hz).
+ @param step                The step that requested this recorder.
+ @param outputDirectory     The directory in which the device motion data should be stored.
+ 
 @return An initialized motion data recorder.
 */
- (instancetype)initWithFrequency:(double)frequency
-                             step:(ORKStep *)step
-                  outputDirectory:(NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                         frequency:(double)frequency
+                              step:(nullable ORKStep *)step
+                   outputDirectory:(nullable NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;

@end
+
+NS_ASSUME_NONNULL_END
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKDeviceMotionRecorder.h"
 #import "ORKHelpers.h"
 #import "ORKRecorder_Internal.h"
@@ -36,12 +37,13 @@
 #import <CoreMotion/CoreMotion.h>
 #import "CMDeviceMotion+ORKJSONDictionary.h"

-@interface ORKDeviceMotionRecorder()
-{
+
+@interface ORKDeviceMotionRecorder () {
    ORKDataLogger *_logger;
 }

@property (nonatomic, strong) CMMotionManager *motionManager;
+
@property (nonatomic) NSTimeInterval uptime;

@end
@@ -49,35 +51,28 @@

@implementation ORKDeviceMotionRecorder

-
- (instancetype)initWithFrequency:(double)frequency
-                             step:(ORKStep *)step
-                  outputDirectory:(NSURL *)outputDirectory
-{
-    self = [super initWithStep:step
-               outputDirectory:(NSURL *)outputDirectory];
-    if (self)
-    {
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                         frequency:(double)frequency
+                              step:(ORKStep *)step
+                   outputDirectory:(NSURL *)outputDirectory {
+    self = [super initWithIdentifier:identifier
+                                step:step
+                     outputDirectory:outputDirectory];
+    if (self) {
        self.frequency = frequency;
        self.continuesInBackground = YES;
    }
    return self;
 }

-
- (void)dealloc
-{
+- (void)dealloc {
    [_logger finishCurrentLog];
 }

- (void)setFrequency:(double)frequency
-{
-    if (frequency <= 0)
-    {
+- (void)setFrequency:(double)frequency {
+    if (frequency <= 0) {
        _frequency = 1;
-    }
-    else
-    {
+    } else {
        _frequency = frequency;
    }
 }
@@ -87,7 +82,6 @@
 }

 - (void)start {
-    
    [super start];
    
    if (! _logger) {
@@ -114,6 +108,10 @@
         if (data)
         {
             success = [_logger append:[data ork_JSONDictionary] error:&error];
+             id delegate = self.delegate;
+             if ([delegate respondsToSelector:@selector(deviceMotionRecorderDidUpdateWithMotion:)]) {
+                 [delegate deviceMotionRecorderDidUpdateWithMotion:data];
+             }
         }
         if (!success)
         {
@@ -124,13 +122,10 @@
     }];
 }

-
- (NSString *)recorderType
-{
+- (NSString *)recorderType {
    return @"deviceMotion";
 }

-
 - (void)stop {
    [self doStopRecording];
    [_logger finishCurrentLog];
@@ -146,16 +141,14 @@
    [super stop];
 }

- (void)doStopRecording
-{
+- (void)doStopRecording {
    if (self.isRecording) {
        [self.motionManager stopDeviceMotionUpdates];
        self.motionManager = nil;
    }
 }

- (void)finishRecordingWithError:(NSError *)error
-{
+- (void)finishRecordingWithError:(NSError *)error {
    [self doStopRecording];
    [super finishRecordingWithError:error];
 }
@@ -168,8 +161,7 @@
    return @"application/json";
 }

- (void)reset
-{
+- (void)reset {
    [super reset];
    
    _logger = nil;
@@ -178,7 +170,8 @@
@end


-@interface ORKDeviceMotionRecorderConfiguration()
+@interface ORKDeviceMotionRecorderConfiguration ()
+
@end


@@ -186,8 +179,12 @@

 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wobjc-designated-initializers"
- (instancetype)initWithFrequency:(double)freq {
-    self = [super ork_init];
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    @throw [NSException exceptionWithName:NSGenericException reason:@"Use subclass designated initializer" userInfo:nil];
+}
+
+- (instancetype)initWithIdentifier:(NSString *)identifier frequency:(double)freq {
+    self = [super initWithIdentifier:identifier];
    if (self) {
        _frequency = freq;
    }
@@ -195,32 +192,27 @@
 }
 #pragma clang diagnostic pop

- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory
-{
-    return [[ORKDeviceMotionRecorder alloc] initWithFrequency:self.frequency
-                                                        step:step
-                                             outputDirectory:(NSURL *)outputDirectory];
+- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
+    return [[ORKDeviceMotionRecorder alloc] initWithIdentifier:self.identifier
+                                                     frequency:self.frequency
+                                                          step:step
+                                               outputDirectory:outputDirectory];
 }

-
- (instancetype)initWithCoder:(NSCoder *)aDecoder
-{
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
-    if (self)
-    {
+    if (self) {
        ORK_DECODE_DOUBLE(aDecoder, frequency);
    }
    return self;
 }

- (void)encodeWithCoder:(NSCoder *)aCoder
-{
+- (void)encodeWithCoder:(NSCoder *)aCoder {
    [super encodeWithCoder:aCoder];
    ORK_ENCODE_DOUBLE(aCoder, frequency);
 }

-+ (BOOL)supportsSecureCoding
-{
+ (BOOL)supportsSecureCoding {
    return YES;
 }

@@ -229,7 +221,7 @@
    
    __typeof(self) castObject = object;
    return (isParentSame &&
-            (self.frequency == castObject.frequency)) ;
+            (self.frequency == castObject.frequency));
 }

 - (ORKPermissionMask)requestedPermissionMask {
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKCustomStepView_Internal.h"

+
 NS_ASSUME_NONNULL_BEGIN

@interface ORKFitnessContentView : ORKActiveStepCustomView
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKFitnessContentView.h"
 #import "ORKHelpers.h"
 #import <CoreMotion/CoreMotion.h>
@@ -35,11 +36,11 @@
 #import "ORKActiveStepQuantityView.h"
 #import "ORKTintedImageView.h"

+
 // #define LAYOUT_TEST 1
 // #define LAYOUT_DEBUG 1

-@interface ORKFitnessContentView()
-{
+@interface ORKFitnessContentView () {
    ORKQuantityLabel *_timerLabel;
    ORKQuantityPairView *_quantityPairView;
    UIView *_imageSpacer1;
@@ -54,6 +55,7 @@

@end

+
@implementation ORKFitnessContentView

 - (ORKActiveStepQuantityView *)distanceView {
@@ -104,11 +106,14 @@
        self.backgroundColor = [[UIColor redColor] colorWithAlphaComponent:0.2];
        _quantityPairView.backgroundColor = [[UIColor orangeColor] colorWithAlphaComponent:0.2];
 #endif
-        
+      
+        [self setDistanceInMeters:0];
+        [self heartRateView].title = ORKLocalizedString(@"FITNESS_HEARTRATE_TITLE", nil);
+
        [self addSubview:_quantityPairView];
        [self addSubview:_imageView];
        [self addSubview:_timerLabel];
-        [self setNeedsUpdateConstraints];
+        [self setupConstraints];
        
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(localeDidChange:) name:NSCurrentLocaleDidChangeNotification object:nil];
        
@@ -125,7 +130,6 @@
    _lengthFormatter = [NSLengthFormatter new];
    _lengthFormatter.numberFormatter.maximumFractionDigits = 1;
    _lengthFormatter.numberFormatter.maximumSignificantDigits = 3;
-    
 }

 - (void)localeDidChange:(NSNotification *)notification {
@@ -133,9 +137,6 @@
    [self setDistanceInMeters:_distanceInMeters];
 }

-
-
-
 - (void)willMoveToWindow:(UIWindow *)newWindow {
    [super willMoveToWindow:newWindow];
    _screenType = ORKGetScreenTypeForWindow(newWindow);
@@ -149,40 +150,94 @@
    _topConstraint.constant = (CaptionBaselineToTimerTop - CaptionBaselineToStepViewTop);
 }

- (void)updateConstraints {
-    
-    
-    if (_constraints) {
-        [self removeConstraints:_constraints];
-        _constraints = nil;
-    }
+- (void)setupConstraints {
    NSMutableArray *constraints = [NSMutableArray array];
    NSDictionary *views = NSDictionaryOfVariableBindings(_timerLabel, _imageView, _quantityPairView, _imageSpacer1, _imageSpacer2);
-    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[_timerLabel][_imageSpacer1(>=0)][_imageView]" options:NSLayoutFormatAlignAllCenterX metrics:nil views:views]];
-    _topConstraint = [NSLayoutConstraint constraintWithItem:_timerLabel attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTop multiplier:1 constant:0];
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[_timerLabel][_imageSpacer1(>=0)][_imageView]"
+                                                                             options:NSLayoutFormatAlignAllCenterX
+                                                                             metrics:nil
+                                                                               views:views]];
+    _topConstraint = [NSLayoutConstraint constraintWithItem:_timerLabel
+                                                  attribute:NSLayoutAttributeTop
+                                                  relatedBy:NSLayoutRelationEqual
+                                                     toItem:self
+                                                  attribute:NSLayoutAttributeTop
+                                                 multiplier:1
+                                                   constant:0];
    [self updateConstraintConstants];
    [constraints addObject:_topConstraint];
-    [constraints addObject:[NSLayoutConstraint constraintWithItem:_timerLabel attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeCenterX multiplier:1 constant:0]];
-    [constraints addObject:[NSLayoutConstraint constraintWithItem:_timerLabel attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationLessThanOrEqual toItem:self attribute:NSLayoutAttributeWidth multiplier:1 constant:0]];
-    [constraints addObject:[NSLayoutConstraint constraintWithItem:_imageView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationLessThanOrEqual toItem:self attribute:NSLayoutAttributeWidth multiplier:1 constant:0]];
+    [constraints addObject:[NSLayoutConstraint
+                            constraintWithItem:_timerLabel
+                            attribute:NSLayoutAttributeCenterX
+                            relatedBy:NSLayoutRelationEqual
+                            toItem:self
+                            attribute:NSLayoutAttributeCenterX
+                            multiplier:1
+                            constant:0]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_timerLabel
+                                                        attribute:NSLayoutAttributeWidth
+                                                        relatedBy:NSLayoutRelationLessThanOrEqual
+                                                           toItem:self attribute:NSLayoutAttributeWidth
+                                                       multiplier:1
+                                                         constant:0]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_imageView
+                                                        attribute:NSLayoutAttributeWidth
+                                                        relatedBy:NSLayoutRelationLessThanOrEqual
+                                                           toItem:self attribute:NSLayoutAttributeWidth
+                                                       multiplier:1
+                                                         constant:0]];
    
-    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[_imageView][_imageSpacer2(>=0)][_quantityPairView]|" options:0 metrics:nil views:views]];
-    [constraints addObject:[NSLayoutConstraint constraintWithItem:_imageSpacer1 attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:0]];
-    [constraints addObject:[NSLayoutConstraint constraintWithItem:_imageSpacer2 attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:0]];
-    [constraints addObject:[NSLayoutConstraint constraintWithItem:_imageSpacer1 attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:_imageSpacer2 attribute:NSLayoutAttributeHeight multiplier:1 constant:0]];
-    NSLayoutConstraint *c1 = [NSLayoutConstraint constraintWithItem:_imageSpacer1 attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:1000];
-    c1.priority = UILayoutPriorityDefaultLow-1;
-    [constraints addObject:c1];
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[_imageView][_imageSpacer2(>=0)][_quantityPairView]|"
+                                                                             options:0
+                                                                             metrics:nil
+                                                                               views:views]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_imageSpacer1
+                                                        attribute:NSLayoutAttributeWidth
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:nil
+                                                        attribute:NSLayoutAttributeNotAnAttribute
+                                                       multiplier:1
+                                                         constant:0]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_imageSpacer2
+                                                        attribute:NSLayoutAttributeWidth
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:nil
+                                                        attribute:NSLayoutAttributeNotAnAttribute
+                                                       multiplier:1
+                                                         constant:0]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_imageSpacer1
+                                                        attribute:NSLayoutAttributeHeight
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:_imageSpacer2
+                                                        attribute:NSLayoutAttributeHeight
+                                                       multiplier:1
+                                                         constant:0]];
+    NSLayoutConstraint *constraint1 = [NSLayoutConstraint constraintWithItem:_imageSpacer1
+                                                          attribute:NSLayoutAttributeHeight
+                                                          relatedBy:NSLayoutRelationEqual
+                                                             toItem:nil
+                                                          attribute:NSLayoutAttributeNotAnAttribute
+                                                         multiplier:1
+                                                           constant:1000];
+    constraint1.priority = UILayoutPriorityDefaultLow-1;
+    [constraints addObject:constraint1];
    
-    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_quantityPairView]|" options:(NSLayoutFormatOptions)0 metrics:nil views:views]];
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_quantityPairView]|"
+                                                                             options:(NSLayoutFormatOptions)0
+                                                                             metrics:nil
+                                                                               views:views]];
    
-    NSLayoutConstraint *maxWidthConstraint = [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:10000];
+    NSLayoutConstraint *maxWidthConstraint = [NSLayoutConstraint constraintWithItem:self 
+                                                                          attribute:NSLayoutAttributeWidth 
+                                                                          relatedBy:NSLayoutRelationEqual
+                                                                             toItem:nil
+                                                                          attribute:NSLayoutAttributeNotAnAttribute
+                                                                         multiplier:1
+                                                                           constant:ORKScreenMetricMaxDimension];
    maxWidthConstraint.priority = UILayoutPriorityRequired-1;
    [constraints addObject:maxWidthConstraint];
    
    [self addConstraints:constraints];
-    _constraints = constraints;
-    [super updateConstraints];
 }

 - (void)setImage:(UIImage *)image {
@@ -191,9 +246,15 @@
    
    _imageRatioConstraint.active = NO;
    
-    CGSize sz = image.size;
-    if (sz.width > 0 && sz.height > 0) {
-        _imageRatioConstraint = [NSLayoutConstraint constraintWithItem:_imageView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:_imageView attribute:NSLayoutAttributeWidth multiplier:sz.height/sz.width constant:0];
+    CGSize size = image.size;
+    if (size.width > 0 && size.height > 0) {
+        _imageRatioConstraint = [NSLayoutConstraint constraintWithItem:_imageView
+                                                             attribute:NSLayoutAttributeHeight
+                                                             relatedBy:NSLayoutRelationEqual
+                                                                toItem:_imageView
+                                                             attribute:NSLayoutAttributeWidth
+                                                            multiplier:size
+                                 .height/size.width constant:0];
        _imageRatioConstraint.active = YES;
    }
 }
@@ -213,7 +274,6 @@
 - (void)setHeartRate:(NSString *)heartRate {
    _heartRate = heartRate;
    [self heartRateView].value = heartRate;
-    [self heartRateView].title = ORKLocalizedString(@"FITNESS_HEARTRATE_TITLE", nil);
 }

 - (void)updateKeylineVisible {
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit.h>
 #import <ResearchKit/ORKActiveStep.h>

+
 /**
 Fitness step.
 
@@ -28,30 +28,36 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKFitnessStep.h"
 #import "ORKFitnessStepViewController.h"

+
@implementation ORKFitnessStep

 + (Class)stepViewControllerClass {
    return [ORKFitnessStepViewController class];
 }

+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    self = [super initWithIdentifier:identifier];
+    if (self) {
+        self.shouldShowDefaultTimer = NO;
+    }
+    return self;
+}
+
 - (void)validateParameters {
-    
    [super validateParameters];
    
    NSTimeInterval const ORKFitnessStepMinimumDuration = 5.0;
    
-    if ( self.stepDuration < ORKFitnessStepMinimumDuration)
-    {
+    if ( self.stepDuration < ORKFitnessStepMinimumDuration) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"rest duration can not be shorter than %@ seconds.", @(ORKFitnessStepMinimumDuration)]  userInfo:nil];
    }
-    
 }

- (instancetype)copyWithZone:(NSZone *)zone
-{
+- (instancetype)copyWithZone:(NSZone *)zone {
    ORKFitnessStep *step = [super copyWithZone:zone];
    return step;
 }
@@ -60,6 +66,4 @@
    return NO;
 }

-
-
@end
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit_Private.h>

+
 /**
 Step view controller corresponding to `ORKFitnessStep`.
 
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKFitnessStepViewController.h"
 #import "ORKHelpers.h"
 #import "ORKStep_Private.h"
@@ -41,20 +42,18 @@
 #import "ORKActiveStepView.h"


-@interface ORKFitnessStepViewController () <ORKHealthQuantityTypeRecorderDelegate,ORKPedometerRecorderDelegate>
-{
+@interface ORKFitnessStepViewController () <ORKHealthQuantityTypeRecorderDelegate,ORKPedometerRecorderDelegate> {
    NSInteger _intendedSteps;
    ORKFitnessContentView *_contentView;
    NSNumberFormatter *_hrFormatter;
-    
 }
+
@end

+
@implementation ORKFitnessStepViewController

-
- (instancetype)initWithStep:(ORKStep *)step {
-    
+- (instancetype)initWithStep:(ORKStep *)step {    
    self = [super initWithStep:step];
    if (self) {
        self.suspendIfInactive = NO;
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ORKRecorder.h>

+
 NS_ASSUME_NONNULL_BEGIN

@class ORKHealthQuantityTypeRecorder;
@@ -37,11 +39,11 @@ NS_ASSUME_NONNULL_BEGIN
@protocol ORKHealthQuantityTypeRecorderDelegate <ORKRecorderDelegate>

@optional
-
 - (void)healthQuantityTypeRecorderDidUpdate:(ORKHealthQuantityTypeRecorder *)healthQuantityTypeRecorder;

@end

+
 /**
 The `ORKHealthQuantityTypeRecorder` class represents a recorder for collecting real time sample data from HealthKit, such as heart rate, during
 an active task.
@@ -49,14 +51,28 @@ NS_ASSUME_NONNULL_BEGIN
 ORK_CLASS_AVAILABLE
@interface ORKHealthQuantityTypeRecorder : ORKRecorder

-@property (nonatomic, readonly, copy) HKQuantityType *quantityType;
-@property (nonatomic, readonly, copy) HKUnit *unit;
-@property (nonatomic, readonly, copy, nullable) HKQuantitySample *lastSample;
+@property (nonatomic, copy, readonly) HKQuantityType *quantityType;

- (instancetype)initWithHealthQuantityType:(HKQuantityType *)quantityType
-                                      unit:(HKUnit *)unit
-                                      step:(ORKStep *)step
-                           outputDirectory:(NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;
+@property (nonatomic, copy, readonly) HKUnit *unit;
+
+@property (nonatomic, copy, readonly, nullable) HKQuantitySample *lastSample;
+
+/**
+ Returns an initialized health quantity type recorder using the specified quantity type and unit.
+ 
+ @param identifier          The unique identifier of the recorder (assigned by the recorder configuration).
+ @param quantityType        The quantity type that should be collected during the active task.
+ @param unit                The unit for the data that should be collected and serialized.
+ @param step                The step that requested this recorder.
+ @param outputDirectory     The directory in which the HealthKit data should be stored.
+ 
+ @return An initialized health quantity type recorder.
+*/
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                healthQuantityType:(HKQuantityType *)quantityType
+                              unit:(HKUnit *)unit
+                              step:(nullable ORKStep *)step
+                   outputDirectory:(nullable NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;

@end

@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKHealthQuantityTypeRecorder.h"
 #import "ORKHelpers.h"
 #import "ORKDataLogger.h"
@@ -35,8 +36,8 @@
 #import "ORKRecorder_Internal.h"
 #import "HKSample+ORKJSONDictionary.h"

-@interface ORKHealthQuantityTypeRecorder()
-{
+
+@interface ORKHealthQuantityTypeRecorder () {
    ORKDataLogger *_logger;
    BOOL _isRecording;
    HKHealthStore *_healthStore;
@@ -46,23 +47,20 @@
    HKQuantitySample *_lastSample;
 }

-@property (nonatomic, strong) NSError *recordingError;
-
@end


@implementation ORKHealthQuantityTypeRecorder

-
- (instancetype)initWithHealthQuantityType:(HKQuantityType *)quantityType
-                                      unit:(HKUnit *)unit
-                                      step:(ORKStep *)step
-                           outputDirectory:(NSURL *)outputDirectory
-{
-    self = [super initWithStep:step
-               outputDirectory:(NSURL *)outputDirectory];
-    if (self)
-    {
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                healthQuantityType:(HKQuantityType *)quantityType
+                              unit:(HKUnit *)unit
+                              step:(ORKStep *)step
+                   outputDirectory:(NSURL *)outputDirectory {
+    self = [super initWithIdentifier:identifier
+                                step:step
+                     outputDirectory:outputDirectory];
+    if (self) {
        NSParameterAssert(quantityType != nil);
        NSParameterAssert(unit != nil);
        // Quantity type and unit are immutable, so should be equivalent to -copy
@@ -74,9 +72,7 @@
    return self;
 }

-
- (void)dealloc
-{
+- (void)dealloc {
    [_logger finishCurrentLog];
 }

@@ -89,7 +85,6 @@
    if (delegate && [delegate respondsToSelector:@selector(healthQuantityTypeRecorderDidUpdate:)]) {
        [delegate healthQuantityTypeRecorderDidUpdate:self];
    }
-    
 }

 static const NSInteger _HealthAnchoredQueryLimit = 100;
@@ -123,19 +118,15 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;
            // Do another fetch immediately rather than wait for an observation
            [self doFetchNewData];
        }
-        
    });
-    
 }

-
 - (void)doFetchNewData {
    if (! _healthStore || ! _isRecording) {
        return;
    }
    NSAssert(_samplePredicate != nil, @"Sample predicate should be non-nil if recording");
    
-    
    __weak typeof(self) weakSelf = self;
    HKAnchoredObjectQuery *anchoredQuery = [[HKAnchoredObjectQuery alloc]
                                            initWithType:_quantityType
@@ -157,12 +148,9 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;
    [_healthStore executeQuery:anchoredQuery];
 }

-
 - (void)start {
-    
    [super start];
    
-    
    if (! _logger) {
        NSError *err = nil;
        _logger = [self makeJSONDataLoggerWithError:&err];
@@ -172,8 +160,7 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;
        }
    }
    
-    if (! [HKHealthStore isHealthDataAvailable])
-    {
+    if (! [HKHealthStore isHealthDataAvailable]) {
        [self finishRecordingWithError:[NSError errorWithDomain:NSCocoaErrorDomain
                                                           code:NSFeatureUnsupportedError
                                                       userInfo:@{@"recorder" : self}]];
@@ -230,13 +217,10 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;
    [_healthStore executeQuery:_observerQuery];
 }

-
- (NSString *)recorderType
-{
+- (NSString *)recorderType {
    return _quantityType.identifier;
 }

-
 - (void)stop {
    if (! _isRecording) {
        return;
@@ -251,14 +235,12 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;
        fileUrl = logFileUrl;
    } error:&error];
    
-    
    [self reportFileResultWithFile:fileUrl error:error];
    
    [super stop];
 }

- (void)doStopRecording
-{
+- (void)doStopRecording {
    if (_isRecording) {
        NSAssert(_observerQuery != nil, @"Observer query should be non-nil when recording");
        [_healthStore stopQuery:_observerQuery];
@@ -271,8 +253,7 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;
    }
 }

- (void)finishRecordingWithError:(NSError *)error
-{
+- (void)finishRecordingWithError:(NSError *)error {
    [self doStopRecording];
    [super finishRecordingWithError:error];
 }
@@ -285,8 +266,7 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;
    return @"application/json";
 }

- (void)reset
-{
+- (void)reset {
    [super reset];
    
    _logger = nil;
@@ -294,15 +274,22 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;

@end

-@interface ORKHealthQuantityTypeRecorderConfiguration()
+
+@interface ORKHealthQuantityTypeRecorderConfiguration ()
+
@end

+
@implementation ORKHealthQuantityTypeRecorderConfiguration

 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wobjc-designated-initializers"
- (instancetype)initWithHealthQuantityType:(HKQuantityType *)quantityType unit:(HKUnit *)unit {
-    self = [super ork_init];
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    @throw [NSException exceptionWithName:NSGenericException reason:@"Use subclass designated initializer" userInfo:nil];
+}
+
+- (instancetype)initWithIdentifier:(NSString *)identifier healthQuantityType:(HKQuantityType *)quantityType unit:(HKUnit *)unit {
+    self = [super initWithIdentifier:identifier];
    if (self) {
        NSParameterAssert(quantityType != nil);
        NSParameterAssert(unit != nil);
@@ -314,34 +301,29 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;
 }
 #pragma clang diagnostic pop

- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory
-{
-    return [[ORKHealthQuantityTypeRecorder alloc] initWithHealthQuantityType:_quantityType
-                                                                       unit:_unit
-                                                                       step:step
-                                                            outputDirectory:outputDirectory];
+- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
+    return [[ORKHealthQuantityTypeRecorder alloc] initWithIdentifier:self.identifier
+                                                  healthQuantityType:_quantityType
+                                                                unit:_unit
+                                                                step:step
+                                                     outputDirectory:outputDirectory];
 }

-
- (instancetype)initWithCoder:(NSCoder *)aDecoder
-{
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
-    if (self)
-    {
+    if (self) {
        ORK_DECODE_OBJ_CLASS(aDecoder, quantityType, HKQuantityType);
        ORK_DECODE_OBJ_CLASS(aDecoder, unit, HKUnit);
    }
    return self;
 }

- (void)encodeWithCoder:(NSCoder *)aCoder
-{
+- (void)encodeWithCoder:(NSCoder *)aCoder {
    ORK_ENCODE_OBJ(aCoder, quantityType);
    ORK_ENCODE_OBJ(aCoder, unit);
 }

-+ (BOOL)supportsSecureCoding
-{
+ (BOOL)supportsSecureCoding {
    return YES;
 }

@@ -351,10 +333,9 @@ static const NSInteger _HealthAnchoredQueryLimit = 100;
    __typeof(self) castObject = object;
    return (isParentSame &&
            ORKEqualObjects(self.quantityType, castObject.quantityType)&&
-            ORKEqualObjects(self.unit, castObject.unit)) ;
+            ORKEqualObjects(self.unit, castObject.unit));
 }

-
 - (NSSet *)requestedHealthKitTypesForReading {
    return [NSSet setWithObject:_quantityType];
 }
@@ -28,8 +28,12 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ORKRecorder.h>

+
+NS_ASSUME_NONNULL_BEGIN
+
 /**
 The `ORKLocationRecorder` class represents a recorder for collecting location data from CoreLocation.
 
@@ -41,4 +45,19 @@
 ORK_CLASS_AVAILABLE
@interface ORKLocationRecorder : ORKRecorder

+/**
+ Returns an initialized location recorder.
+ 
+ @param identifier          The unique identifier of the recorder (assigned by the recorder configuration).
+ @param step                The step that requested this recorder.
+ @param outputDirectory     The directory in which the location data should be stored.
+ 
+ @return An initialized location recorder.
+*/
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                              step:(nullable ORKStep *)step
+                   outputDirectory:(nullable NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;
+
@end
+
+NS_ASSUME_NONNULL_END
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKLocationRecorder.h"
 #import <CoreLocation/CoreLocation.h>
 #import "CLLocation+ORKJSONDictionary.h"
@@ -35,13 +36,15 @@
 #import "ORKRecorder_Internal.h"
 #import "ORKRecorder_Private.h"

-@interface ORKLocationRecorder() <CLLocationManagerDelegate>
-{
+
+@interface ORKLocationRecorder () <CLLocationManagerDelegate> {
    ORKDataLogger *_logger;
    NSError *_recordingError;
    BOOL _started;
 }
+
@property (nonatomic, strong) CLLocationManager *locationManager;
+
@property (nonatomic) NSTimeInterval uptime;

@end
@@ -49,19 +52,15 @@

@implementation ORKLocationRecorder

-
- (instancetype)initWithStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory
-{
-    self = [super initWithStep:step outputDirectory:outputDirectory];
-    if (self)
-    {
+- (instancetype)initWithIdentifier:(NSString *)identifier step:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
+    self = [super initWithIdentifier:identifier step:step outputDirectory:outputDirectory];
+    if (self) {
        self.continuesInBackground = YES;
    }
    return self;
 }

- (void)dealloc
-{
+- (void)dealloc {
    [_logger finishCurrentLog];
 }

@@ -86,8 +85,7 @@
    }
    
    self.locationManager = [self createLocationManager];
-    if ([CLLocationManager authorizationStatus] <= kCLAuthorizationStatusDenied)
-    {
+    if ([CLLocationManager authorizationStatus] <= kCLAuthorizationStatusDenied) {
        [self.locationManager requestWhenInUseAuthorization];
    }
    self.locationManager.pausesLocationUpdatesAutomatically = NO;
@@ -115,7 +113,6 @@
    [self doStopRecording];
    [_logger finishCurrentLog];
    
-    
    NSError *error = _recordingError;
    _recordingError = nil;
    __block NSURL *fileUrl = nil;
@@ -129,13 +126,11 @@
 }

 - (void)locationManager:(CLLocationManager *)manager
-     didUpdateLocations:(NSArray *)locations
-{
+     didUpdateLocations:(NSArray *)locations {
    BOOL success = YES;
    NSParameterAssert([locations count] >= 0);
    NSError *error = nil;
-    if (locations)
-    {
+    if (locations) {
        NSMutableArray *dictionaries = [NSMutableArray arrayWithCapacity:[locations count]];
        [locations enumerateObjectsUsingBlock:^(CLLocation *obj, NSUInteger idx, BOOL *stop) {
            NSDictionary *d = [obj ork_JSONDictionary];
@@ -144,8 +139,7 @@
        
        success = [_logger appendObjects:dictionaries error:&error];
    }
-    if (!success)
-    {
+    if (!success) {
        dispatch_async(dispatch_get_main_queue(), ^{
            _recordingError = error;
            [self stop];
@@ -153,8 +147,7 @@
    }
 }

- (void)finishRecordingWithError:(NSError *)error
-{
+- (void)finishRecordingWithError:(NSError *)error {
    [self doStopRecording];
    [super finishRecordingWithError:nil];
 }
@@ -163,14 +156,12 @@
    return [CLLocationManager locationServicesEnabled] && (self.locationManager != nil) && ([CLLocationManager authorizationStatus] > kCLAuthorizationStatusDenied);
 }

- (void)reset
-{
+- (void)reset {
    [super reset];
    
    _logger = nil;
 }

-
 - (NSString *)mimeType {
    return @"application/json";
 }
@@ -178,35 +169,36 @@
@end


-@interface ORKLocationRecorderConfiguration()
+@interface ORKLocationRecorderConfiguration ()
+
@end

+
@implementation ORKLocationRecorderConfiguration

- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
-    return [[ORKLocationRecorder alloc] initWithStep:step outputDirectory:outputDirectory];
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    return [super initWithIdentifier:identifier];
 }

-
+- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
+    return [[ORKLocationRecorder alloc] initWithIdentifier:self.identifier step:step outputDirectory:outputDirectory];
+}

 - (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    return self;
 }

-+ (BOOL)supportsSecureCoding
-{
+ (BOOL)supportsSecureCoding {
    return YES;
 }

-
 - (BOOL)isEqual:(id)object {
    BOOL isParentSame = [super isEqual:object];
    
    return isParentSame;
 }

-
 - (ORKPermissionMask)requestedPermissionMask {
    return ORKPermissionCoreLocation;
 }
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ORKRecorder.h>

+
 NS_ASSUME_NONNULL_BEGIN

@class ORKPedometerRecorder;
@@ -37,11 +39,11 @@ NS_ASSUME_NONNULL_BEGIN
@protocol ORKPedometerRecorderDelegate <ORKRecorderDelegate>

@optional
-
 - (void)pedometerRecorderDidUpdate:(ORKPedometerRecorder *)pedometerRecorder;

@end

+
 /**
 A recorder that requests and collects device motion data from CoreMotion at a fixed frequency.
 
@@ -52,13 +54,24 @@ ORK_CLASS_AVAILABLE
@interface ORKPedometerRecorder : ORKRecorder

@property (nonatomic, readonly, nullable) NSDate *lastUpdateDate;
+
@property (nonatomic, readonly) NSInteger totalNumberOfSteps;

 // Negative if an invalid value.
@property (nonatomic, readonly) NSInteger totalDistance;

- (instancetype)initWithStep:(ORKStep *)step
-             outputDirectory:(NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;
+/**
+ Returns an initialized pedometer recorder.
+ 
+ @param identifier          The unique identifier of the recorder (assigned by the recorder configuration).
+ @param step                The step that requested this recorder.
+ @param outputDirectory     The directory in which the pedometer data should be stored.
+ 
+ @return An initialized pedometer recorder.
+ */
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                              step:(nullable ORKStep *)step
+                   outputDirectory:(nullable NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;

@end

@@ -28,49 +28,43 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKPedometerRecorder.h"
 #import "ORKDataLogger.h"
 #import "CMPedometerData+ORKJSONDictionary.h"
 #import "ORKRecorder_Internal.h"
 #import "ORKRecorder_Private.h"

-@interface ORKPedometerRecorder()
-{
+
+@interface ORKPedometerRecorder () {
    ORKDataLogger *_logger;
    BOOL _isRecording;
 }

@property (nonatomic, strong) CMPedometer *pedometer;
-@property (nonatomic, strong) NSError *recordingError;

@end


@implementation ORKPedometerRecorder

-
- (instancetype)initWithStep:(ORKStep *)step
-             outputDirectory:(NSURL *)outputDirectory
-{
-    self = [super initWithStep:step
-               outputDirectory:(NSURL *)outputDirectory];
-    if (self)
-    {
+- (instancetype)initWithIdentifier:(NSString *)identifier
+                              step:(ORKStep *)step
+                   outputDirectory:(NSURL *)outputDirectory {
+    self = [super initWithIdentifier:identifier
+                                step:step
+                     outputDirectory:outputDirectory];
+    if (self) {
        self.continuesInBackground = YES;
    }
    return self;
 }

-
- (void)dealloc
-{
+- (void)dealloc {
    [_logger finishCurrentLog];
 }

-
-
 - (void)updateStatisticsWithData:(CMPedometerData *)pedometerData {
-    
    _lastUpdateDate = pedometerData.endDate;
    _totalNumberOfSteps = [pedometerData.numberOfSteps integerValue];
    if (pedometerData.distance) {
@@ -90,7 +84,6 @@
 }

 - (void)start {
-    
    [super start];
    
    _lastUpdateDate = nil;
@@ -108,8 +101,7 @@
    
    self.pedometer = [self createPedometer];
    
-    if (! [[self.pedometer class] isStepCountingAvailable])
-    {
+    if (! [[self.pedometer class] isStepCountingAvailable]) {
        [self finishRecordingWithError:[NSError errorWithDomain:NSCocoaErrorDomain
                                                           code:NSFeatureUnsupportedError
                                                       userInfo:@{@"recorder" : self}]];
@@ -121,16 +113,14 @@
    [self.pedometer startPedometerUpdatesFromDate:[NSDate date] withHandler:^(CMPedometerData *pedometerData, NSError *error) {
        
        BOOL success = NO;
-        if (pedometerData)
-        {
+        if (pedometerData) {
            success = [_logger append:[pedometerData ork_JSONDictionary] error:&error];
            dispatch_async(dispatch_get_main_queue(), ^{
                __typeof(self) strongSelf = weakSelf;
                [strongSelf updateStatisticsWithData:pedometerData];
            });
        }
-        if (!success || error)
-        {
+        if (!success || error) {
            dispatch_async(dispatch_get_main_queue(), ^{
                __typeof(self) strongSelf = weakSelf;
                [strongSelf finishRecordingWithError:error];
@@ -139,13 +129,10 @@
    }];
 }

-
- (NSString *)recorderType
-{
+- (NSString *)recorderType {
    return @"pedometer";
 }

-
 - (void)stop {
    [self doStopRecording];
    [_logger finishCurrentLog];
@@ -154,17 +141,15 @@
    __block NSURL *fileUrl = nil;
    [_logger enumerateLogs:^(NSURL *logFileUrl, BOOL *stop) {
        fileUrl = logFileUrl;
-    } error:&error];
-    
-    
+    }
+                     error:&error];
    
    [self reportFileResultWithFile:fileUrl error:error];
    
    [super stop];
 }

- (void)doStopRecording
-{
+- (void)doStopRecording {
    if (_isRecording) {
        [self.pedometer stopPedometerUpdates];
        _isRecording = NO;
@@ -172,8 +157,7 @@
    }
 }

- (void)finishRecordingWithError:(NSError *)error
-{
+- (void)finishRecordingWithError:(NSError *)error {
    [self doStopRecording];
    [super finishRecordingWithError:error];
 }
@@ -186,8 +170,7 @@
    return @"application/json";
 }

- (void)reset
-{
+- (void)reset {
    [super reset];
    
    _logger = nil;
@@ -196,47 +179,40 @@
@end


-@interface ORKPedometerRecorderConfiguration()
+@interface ORKPedometerRecorderConfiguration ()
+
@end


@implementation ORKPedometerRecorderConfiguration

- (instancetype)init {
-    self = [super ork_init];
-    return self;
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    return [super initWithIdentifier:identifier];
 }

- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory
-{
-    return [[ORKPedometerRecorder alloc] initWithStep:step
-                                     outputDirectory:outputDirectory];
+- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
+    return [[ORKPedometerRecorder alloc] initWithIdentifier:self.identifier
+                                                       step:step
+                                            outputDirectory:outputDirectory];
 }

-
- (instancetype)initWithCoder:(NSCoder *)aDecoder
-{
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    return self;
 }

-+ (BOOL)supportsSecureCoding
-{
+ (BOOL)supportsSecureCoding {
    return YES;
 }

-
 - (BOOL)isEqual:(id)object {
    BOOL isParentSame = [super isEqual:object];
    
-    return (isParentSame) ;
+    return (isParentSame);
 }

-
-
 - (ORKPermissionMask)requestedPermissionMask {
    return ORKPermissionCoreMotionActivity;
 }

@end
-
@@ -0,0 +1,45 @@
+/*
+ Copyright (c) 2015, James Cox. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#import "ORKCustomStepView_Internal.h"
+
+
+@interface ORKReactionTimeContentView : ORKActiveStepCustomView
+
+- (void)setStimulusHidden:(BOOL)hidden;
+
+- (void)startSuccessAnimationWithDuration:(NSTimeInterval)duration completion:(nullable void (^)(void))completion;
+
+- (void)startFailureAnimationWithDuration:(NSTimeInterval)duration completion:(nullable void (^)(void))completion;
+
+- (void)resetAfterDelay:(NSTimeInterval)delay completion:(nullable void (^)(void))completion;
+
+@end
@@ -0,0 +1,113 @@
+/*
+ Copyright (c) 2015, James Cox. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#import "ORKReactionTimeContentView.h"
+#import "ORKReactionTimeStimulusView.h"
+#import "ORKNavigationContainerView.h"
+
+
+@interface ORKReactionTimeContentView ()
+
+@property (nonatomic, strong) ORKReactionTimeStimulusView *stimulusView;
+
+@end
+
+
+@implementation ORKReactionTimeContentView
+
+- (instancetype)initWithFrame:(CGRect)frame {
+    self = [super initWithFrame:frame];
+    if (self) {
+        self.translatesAutoresizingMaskIntoConstraints = NO;
+        [self addStimulusView];
+    }
+    return self;
+}
+
+- (void)startSuccessAnimationWithDuration:(NSTimeInterval)duration completion:(void (^)(void))completion {
+    [_stimulusView startSuccessAnimationWithDuration:duration completion:completion];
+}
+
+- (void)startFailureAnimationWithDuration:(NSTimeInterval)duration completion:(void (^)(void))completion {
+    [_stimulusView startFailureAnimationWithDuration:duration completion:completion];
+}
+
+- (void)resetAfterDelay:(NSTimeInterval)delay completion:(nullable void (^)(void))completion {
+    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delay * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+        _stimulusView.hidden = YES;
+        if (completion) {
+            completion();
+        }
+    });
+}
+
+- (void)addStimulusView {
+    if (!_stimulusView) {
+        _stimulusView = [ORKReactionTimeStimulusView new];
+        _stimulusView.translatesAutoresizingMaskIntoConstraints = NO;
+        _stimulusView.backgroundColor = self.tintColor;
+        [self addSubview:_stimulusView];
+        [self setUpStimulusViewConstraints];
+    }
+}
+
+- (void)setStimulusHidden:(BOOL)hidden {
+    _stimulusView.hidden = hidden;
+}
+
+- (void)setUpStimulusViewConstraints {
+    NSMutableArray *constraints = [NSMutableArray array];
+    
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_stimulusView
+                                                        attribute:NSLayoutAttributeCenterX
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:self
+                                                        attribute:NSLayoutAttributeCenterX
+                                                       multiplier:1.0
+                                                         constant:0.0]];
+    
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_stimulusView
+                                                        attribute:NSLayoutAttributeTop
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:self
+                                                        attribute:NSLayoutAttributeTop
+                                                       multiplier:1.0
+                                                         constant:8.0]];
+    
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[_stimulusView]-(>=0)-|"
+                                                                             options:NSLayoutFormatAlignAllCenterX
+                                                                             metrics:nil
+                                                                               views:NSDictionaryOfVariableBindings(_stimulusView)]];
+    
+    [NSLayoutConstraint activateConstraints:constraints];
+}
+
+@end
@@ -0,0 +1,59 @@
+/*
+ Copyright (c) 2015, James Cox. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#import <ResearchKit/ResearchKit.h>
+#import <AudioToolbox/AudioServices.h>
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+ORK_CLASS_AVAILABLE
+@interface ORKReactionTimeStep : ORKActiveStep
+
+@property (nonatomic, assign) NSTimeInterval maximumStimulusInterval;
+
+@property (nonatomic, assign) NSTimeInterval minimumStimulusInterval;
+
+@property (nonatomic, assign) NSTimeInterval timeout;
+
+@property (nonatomic, assign) NSInteger numberOfAttempts;
+
+@property (nonatomic, assign) double thresholdAcceleration;
+
+@property (nonatomic, assign) SystemSoundID successSound;
+
+@property (nonatomic, assign) SystemSoundID timeoutSound;
+
+@property (nonatomic, assign) SystemSoundID failureSound;
+
+@end
+
+NS_ASSUME_NONNULL_END
@@ -0,0 +1,146 @@
+/*
+ Copyright (c) 2015, James Cox. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#import "ORKReactionTimeStep.h"
+#import "ORKReactionTimeViewController.h"
+#import "ORKHelpers.h"
+
+
+@implementation ORKReactionTimeStep
+
+ (Class)stepViewControllerClass {
+    return [ORKReactionTimeViewController class];
+}
+
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    self = [super initWithIdentifier:identifier];
+    self.shouldContinueOnFinish = YES;
+    return self;
+}
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    ORKReactionTimeStep *step = [super copyWithZone:zone];
+    step.maximumStimulusInterval = self.maximumStimulusInterval;
+    step.minimumStimulusInterval = self.minimumStimulusInterval;
+    step.thresholdAcceleration = self.thresholdAcceleration;
+    step.timeout = self.timeout;
+    step.numberOfAttempts = self.numberOfAttempts;
+    step.successSound = self.successSound;
+    step.timeoutSound = self.timeoutSound;
+    step.failureSound = self.failureSound;
+    return step;
+}
+
+- (void)validateParameters {
+    [super validateParameters];
+    
+    if (self.minimumStimulusInterval <= 0) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException
+                                       reason:@"minimumStimulusInterval must be greater than zero"
+                                     userInfo:nil];
+    }
+    if (self.maximumStimulusInterval < self.minimumStimulusInterval) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException
+                                       reason:@"maximumStimulusInterval can not be less than minimumStimulusInterval"
+                                     userInfo:nil];
+    }
+    if (self.thresholdAcceleration <= 0) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException
+                                       reason:@"thresholdAcceleration must be greater than zero"
+                                     userInfo:nil];
+    }
+    if (self.timeout <= 0) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException
+                                       reason:@"timeout must be greater than zero"
+                                     userInfo:nil];
+    }
+    if (self.numberOfAttempts <= 0) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException
+                                       reason:@"numberOfAttempts must be greater than zero"
+                                     userInfo:nil];
+    }
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+    self = [super initWithCoder:aDecoder];
+    if (self) {
+        ORK_DECODE_DOUBLE(aDecoder, maximumStimulusInterval);
+        ORK_DECODE_DOUBLE(aDecoder, minimumStimulusInterval);
+        ORK_DECODE_DOUBLE(aDecoder, thresholdAcceleration);
+        ORK_DECODE_DOUBLE(aDecoder, timeout);
+        ORK_DECODE_UINT32(aDecoder, successSound);
+        ORK_DECODE_UINT32(aDecoder, timeoutSound);
+        ORK_DECODE_UINT32(aDecoder, failureSound);
+        ORK_DECODE_INTEGER(aDecoder, numberOfAttempts);
+    }
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)aCoder {
+    [super encodeWithCoder:aCoder];
+        ORK_ENCODE_DOUBLE(aCoder, maximumStimulusInterval);
+        ORK_ENCODE_DOUBLE(aCoder, minimumStimulusInterval);
+        ORK_ENCODE_DOUBLE(aCoder, thresholdAcceleration);
+        ORK_ENCODE_DOUBLE(aCoder, timeout);
+        ORK_ENCODE_UINT32(aCoder, successSound);
+        ORK_ENCODE_UINT32(aCoder, timeoutSound);
+        ORK_ENCODE_UINT32(aCoder, failureSound);
+        ORK_ENCODE_INTEGER(aCoder, numberOfAttempts);
+}
+
+ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (BOOL)isEqual:(id)object {
+    BOOL isParentSame = [super isEqual:object];
+    
+    __typeof(self) castObject = object;
+    return (isParentSame &&
+            (self.maximumStimulusInterval == castObject.maximumStimulusInterval) &&
+            (self.minimumStimulusInterval == castObject.minimumStimulusInterval) &&
+            (self.thresholdAcceleration == castObject.thresholdAcceleration) &&
+            (self.timeout == castObject.timeout) &&
+            (self.successSound == castObject.successSound) &&
+            (self.timeoutSound == castObject.timeoutSound) &&
+            (self.failureSound == castObject.failureSound) &&
+            (self.numberOfAttempts == castObject.numberOfAttempts));
+}
+
+- (BOOL)allowsBackNavigation {
+    return NO;
+}
+
+- (BOOL)startsFinished {
+    return NO;
+}
+
+@end
@@ -0,0 +1,43 @@
+/*
+ Copyright (c) 2015, James Cox. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#import "ORKCustomStepView_Internal.h"
+
+
+@interface ORKReactionTimeStimulusView : UIView
+
+- (void)reset;
+
+- (void)startSuccessAnimationWithDuration:(NSTimeInterval)duration completion:(nullable void(^)(void))completion;
+
+- (void)startFailureAnimationWithDuration:(NSTimeInterval)duration completion:(nullable void(^)(void))completion;
+
+@end
@@ -0,0 +1,165 @@
+/*
+ Copyright (c) 2015, James Cox. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#import "ORKReactionTimeStimulusView.h"
+
+
+@implementation ORKReactionTimeStimulusView {
+    CAShapeLayer *_tickLayer;
+    CAShapeLayer *_crossLayer;
+}
+
+static const CGFloat RoundReactionTimeViewDiameter = 122;
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        self.layer.cornerRadius = RoundReactionTimeViewDiameter * 0.5;
+    }
+    return self;
+}
+
+- (CGSize)intrinsicContentSize {
+    return CGSizeMake(RoundReactionTimeViewDiameter, RoundReactionTimeViewDiameter);
+}
+
+- (void)reset {
+    [_tickLayer removeFromSuperlayer];
+    [_crossLayer removeFromSuperlayer];
+    _tickLayer = nil;
+    _crossLayer = nil;
+    self.layer.backgroundColor = self.tintColor.CGColor;
+}
+
+- (void)startSuccessAnimationWithDuration:(NSTimeInterval)duration completion:(void(^)(void))completion {
+    if (self.hidden) {
+        if (completion) {
+            completion();
+        }
+        return;
+    }
+    
+    [self addTickLayer];
+    [CATransaction begin];
+    [CATransaction setCompletionBlock:completion];
+    CAMediaTimingFunction *timing = [[CAMediaTimingFunction alloc] initWithControlPoints:0.180739998817444 :0 :0.577960014343262 :0.918200016021729];
+    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
+    [animation setTimingFunction:timing];
+    animation.removedOnCompletion = NO;
+    [animation setFillMode:kCAFillModeForwards];
+    animation.fromValue = @(0);
+    animation.toValue = @(1);
+    animation.duration = duration;
+    [_tickLayer addAnimation:animation forKey:@"strokeEnd"];
+    [CATransaction commit];
+}
+
+- (void)startFailureAnimationWithDuration:(NSTimeInterval)duration completion:(void(^)(void))completion {
+    self.hidden = NO;
+
+    self.layer.backgroundColor = [UIColor clearColor].CGColor;
+    [self addCrossLayer];
+    [CATransaction begin];
+    [CATransaction setCompletionBlock:completion];
+    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
+    [animation setFillMode:kCAFillModeForwards];
+    animation.fromValue = @([(CAShapeLayer *)[_crossLayer presentationLayer] strokeEnd]);
+    animation.toValue = @(1);
+    animation.duration = duration;
+    _crossLayer.strokeEnd = 1;
+    [_crossLayer addAnimation:animation forKey:@"strokeEnd"];
+    [CATransaction commit];
+}
+
+- (void)setHidden:(BOOL)hidden {
+    [self reset];
+    [super setHidden:hidden];
+}
+
+- (void)addCrossLayer {
+    _crossLayer = [self lineDrawingLayer];
+    _crossLayer.strokeColor = [UIColor redColor].CGColor;
+    _crossLayer.path = [self crossPath];
+    [self.layer addSublayer:_crossLayer];
+}
+
+- (void)addTickLayer {
+    _tickLayer = [self lineDrawingLayer];
+    _tickLayer.strokeColor = [UIColor whiteColor].CGColor;
+    _tickLayer.path = [self tickPath];
+    [self.layer addSublayer:_tickLayer];
+}
+
+- (CGPathRef)concealPath:(CGFloat)radius {
+    return [[UIBezierPath bezierPathWithArcCenter:CGPointMake(radius, radius)
+                                           radius:radius / 2
+                                       startAngle:M_PI + M_PI_2
+                                         endAngle:-M_PI_2
+                                        clockwise:NO] CGPath];
+}
+
+- (CGPathRef)tickPath {
+    UIBezierPath *path = [self linePath];
+    [path moveToPoint:(CGPoint){37,65}];
+    [path addLineToPoint:(CGPoint){50,78}];
+    [path addLineToPoint:(CGPoint){87,42}];
+    return path.CGPath;
+}
+
+- (CGPathRef)crossPath {
+    UIBezierPath *path = [self linePath];
+    [path moveToPoint:(CGPoint){45,78}];
+    [path addLineToPoint:(CGPoint){82,42}];
+    [path moveToPoint:(CGPoint){45,42}];
+    [path addLineToPoint:(CGPoint){82,78}];
+    return path.CGPath;
+}
+
+- (UIBezierPath *)linePath {
+    UIBezierPath *path = [UIBezierPath new];
+    path.lineCapStyle = kCGLineCapRound;
+    path.lineWidth = 5;
+    return path;
+}
+
+- (CAShapeLayer *)lineDrawingLayer {
+    CAShapeLayer *shapeLayer = [CAShapeLayer new];
+    shapeLayer.strokeEnd = 0;
+    shapeLayer.lineWidth = 5;
+    shapeLayer.lineCap = kCALineCapRound;
+    shapeLayer.lineJoin = kCALineJoinRound;
+    shapeLayer.frame = self.layer.bounds;
+    shapeLayer.backgroundColor = [UIColor clearColor].CGColor;
+    shapeLayer.fillColor = nil;
+    return shapeLayer;
+}
+
+@end
@@ -0,0 +1,42 @@
+/*
+ Copyright (c) 2015, James Cox. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#import <ResearchKit/ResearchKit.h>
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+ORK_CLASS_AVAILABLE
+@interface ORKReactionTimeViewController : ORKActiveStepViewController
+
+@end
+
+NS_ASSUME_NONNULL_END
@@ -0,0 +1,231 @@
+/*
+ Copyright (c) 2015, James Cox. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#import "ORKReactionTimeViewController.h"
+#import "ORKActiveStepViewController_Internal.h"
+#import "ORKActiveStepView.h"
+#import "ORKReactionTimeContentView.h"
+#import "ORKReactionTimeStep.h"
+#import <CoreMotion/CMDeviceMotion.h>
+#import <AudioToolbox/AudioServices.h>
+
+
+@implementation ORKReactionTimeViewController {
+    ORKReactionTimeContentView *_reactionTimeContentView;
+    NSMutableArray *_results;
+    NSTimer *_stimulusTimer;
+    NSTimer *_timeoutTimer;
+    NSTimeInterval _stimulusTimestamp;
+    BOOL _validResult;
+    BOOL _timedOut;
+    BOOL _shouldIndicateFailure;
+}
+
+static const NSTimeInterval OutcomeAnimationDuration = 0.3;
+
+#pragma mark - UIViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    // Do any additional setup after loading the view.
+    [self configureTitle];
+    _results = [NSMutableArray new];
+    _reactionTimeContentView = [ORKReactionTimeContentView new];
+    self.activeStepView.activeCustomView = _reactionTimeContentView;
+    self.activeStepView.stepViewFillsAvailableSpace = YES;
+    [_reactionTimeContentView setStimulusHidden:YES];
+}
+
+- (void)viewDidAppear:(BOOL)animated {
+    [super viewDidAppear:animated];
+    [self start];
+    _shouldIndicateFailure = YES;
+}
+
+- (void)viewWillDisappear:(BOOL)animated {
+    [super viewWillDisappear:animated];
+    _shouldIndicateFailure = NO;
+}
+
+#pragma mark - ORKActiveStepViewController
+
+- (void)start {
+    [super start];
+    [self startStimulusTimer];
+
+}
+
+#if TARGET_IPHONE_SIMULATOR
+- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event
+{
+    if(event.type == UIEventSubtypeMotionShake)
+    {
+        if (_validResult) {
+            ORKReactionTimeResult *reactionTimeResult = [[ORKReactionTimeResult alloc] initWithIdentifier:self.step.identifier];
+            reactionTimeResult.timestamp = _stimulusTimestamp;
+            [_results addObject:reactionTimeResult];
+        }
+        [self attemptDidFinish];
+    }
+}
+#endif
+
+
+- (ORKStepResult *)result {
+    ORKStepResult *stepResult = [super result];
+    stepResult.results = _results;
+    return stepResult;
+}
+
+- (void)applicationWillResignActive:(NSNotification *)notification {
+    [super applicationWillResignActive:notification];
+    _validResult = NO;
+    [_stimulusTimer invalidate];
+    [_timeoutTimer invalidate];
+}
+
+- (void)applicationDidBecomeActive:(NSNotification *)notification {
+    [super applicationDidBecomeActive:notification];
+    [self resetAfterDelay:0];
+}
+
+#pragma mark - ORKRecorderDelegate
+
+- (void)recorder:(ORKRecorder *)recorder didCompleteWithResult:(ORKResult *)result {
+    if (_validResult) {
+        ORKReactionTimeResult *reactionTimeResult = [[ORKReactionTimeResult alloc] initWithIdentifier:self.step.identifier];
+        reactionTimeResult.timestamp = _stimulusTimestamp;
+        reactionTimeResult.fileResult = (ORKFileResult *)result;
+        [_results addObject:reactionTimeResult];
+    }
+    [self attemptDidFinish];
+}
+
+#pragma mark - ORKDeviceMotionRecorderDelegate
+
+- (void)deviceMotionRecorderDidUpdateWithMotion:(CMDeviceMotion *)motion {
+    CMAcceleration v = motion.userAcceleration;
+    double vectorMagnitude = sqrt(((v.x * v.x) + (v.y * v.y) + (v.z * v.z)));
+    if (vectorMagnitude > [self reactionTimeStep].thresholdAcceleration) {
+        [self stopRecorders];
+    }
+}
+
+#pragma mark - ORKReactionTimeStepViewController
+
+- (ORKReactionTimeStep *)reactionTimeStep {
+    return (ORKReactionTimeStep *)self.step;
+}
+
+- (void)configureTitle {
+    NSString *format = ORKLocalizedString(@"REACTION_TIME_TASK_ATTEMPTS_FORMAT", nil);
+    NSString *text = [NSString stringWithFormat:format, _results.count + 1, [self reactionTimeStep].numberOfAttempts];
+    [self.activeStepView updateTitle:ORKLocalizedString(@"REACTION_TIME_TASK_ACTIVE_STEP_TITLE", nil) text:text];
+}
+
+- (void)attemptDidFinish {
+    void (^completion)(void) = ^{
+        if ([_results count] == [self reactionTimeStep].numberOfAttempts) {
+            [self finish];
+        } else {
+            [self resetAfterDelay:2];
+        }
+    };
+    if (_validResult) {
+        [self indicateSuccess:completion];
+    } else {
+        [self indicateFailure:completion];
+    }
+    _validResult = NO;
+    _timedOut = NO;
+    [_stimulusTimer invalidate];
+    [_timeoutTimer invalidate];
+}
+
+- (void)indicateSuccess:(void(^)(void))completion {
+    [_reactionTimeContentView startSuccessAnimationWithDuration:OutcomeAnimationDuration completion:completion];
+    AudioServicesPlaySystemSound([self reactionTimeStep].successSound);
+}
+
+- (void)indicateFailure:(void(^)(void))completion {
+    if (!_shouldIndicateFailure) {
+        return;
+    }
+    [_reactionTimeContentView startFailureAnimationWithDuration:OutcomeAnimationDuration completion:completion];
+    SystemSoundID sound = _timedOut ? [self reactionTimeStep].timeoutSound : [self reactionTimeStep].failureSound;
+    AudioServicesPlayAlertSound(sound);
+}
+
+- (void)resetAfterDelay:(NSTimeInterval)delay {
+    __weak __typeof(self) weakSelf = self;
+    [_reactionTimeContentView resetAfterDelay:delay completion:^{
+        [weakSelf configureTitle];
+        [weakSelf start];
+    }];
+}
+
+- (void)startStimulusTimer {
+    _stimulusTimer = [NSTimer scheduledTimerWithTimeInterval:[self stimulusInterval] target:self selector:@selector(stimulusTimerDidFire) userInfo:nil repeats:NO];
+}
+
+- (void)stimulusTimerDidFire {
+    _stimulusTimestamp = [NSProcessInfo processInfo].systemUptime;
+    [_reactionTimeContentView setStimulusHidden:NO];
+    _validResult = YES;
+    [self startTimeoutTimer];
+}
+
+- (void)startTimeoutTimer {
+    NSTimeInterval timeout = [self reactionTimeStep].timeout;
+    if (timeout > 0) {
+        _timeoutTimer = [NSTimer scheduledTimerWithTimeInterval:timeout target:self selector:@selector(timeoutTimerDidFire) userInfo:nil repeats:NO];
+    }
+}
+
+- (void)timeoutTimerDidFire {
+    _validResult = NO;
+    _timedOut = YES;
+    [self stopRecorders];
+    
+#if TARGET_IPHONE_SIMULATOR
+    // Device motion recorder won't work, so manually trigger didfinish
+    [self attemptDidFinish];
+#endif
+}
+
+- (NSTimeInterval)stimulusInterval {
+    ORKReactionTimeStep *step = [self reactionTimeStep];
+    NSTimeInterval range = step.maximumStimulusInterval - step.minimumStimulusInterval;
+    NSTimeInterval randomFactor = ((NSTimeInterval)rand() / RAND_MAX) * range;
+    return randomFactor + step.minimumStimulusInterval;
+}
+
+@end
@@ -1,5 +1,6 @@
 /*
 Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, Ricardo Sánchez-Sáez.
 
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
@@ -34,6 +35,7 @@
 #import <HealthKit/HealthKit.h>
 #import <ResearchKit/ORKResult.h>

+
 NS_ASSUME_NONNULL_BEGIN

@class ORKRecorder;
@@ -57,21 +59,35 @@ NS_ASSUME_NONNULL_BEGIN
 ORK_CLASS_AVAILABLE
@interface ORKRecorderConfiguration : NSObject <NSSecureCoding>

-/**
- The `init` method is unavailable outside the framework on `ORKRecorderConfiguration`,
+/*
+ The `init` and `new` methods are unavailable outside the framework on `ORKRecorderConfiguration`,
 because it is an abstract class.
 
 `ORKRecorderConfiguration` classes should be initialized with custom designated
 initializers on each subclass.
 */
+ (instancetype)new NS_UNAVAILABLE;
 - (instancetype)init NS_UNAVAILABLE;

+/**
+ A short string that uniquely identifies the recorder configuration within the step.
+ 
+ The identifier is reproduced in the results of a recorder created from this configuration. In fact, the only way to link a result
+ (an `ORKFileResult` object) to the recorder that generated it is to look at the value of
+ `identifier`. To accurately identify recorder results, you need to ensure that recorder identifiers
+ are unique within each step.
+ 
+ In some cases, it can be useful to link the recorder identifier to a unique identifier in a
+ database; in other cases, it can make sense to make the identifier human
+ readable.
+ */
+@property (nonatomic, copy, readonly) NSString *identifier;
+
 /**
 Returns a recorder instance using this configuration.
 
- @param step      The step for which this recorder is being created.
- @param outputDirectory     The directory in which all output file data should be written
- (if producing `ORKFileResult` instances).
+ @param step                The step for which this recorder is being created.
+ @param outputDirectory     The directory in which all output file data should be written (if producing `ORKFileResult` instances).
 
 @return A configured recorder instance.
 */
@@ -117,17 +133,25 @@ ORK_CLASS_AVAILABLE
 
 This method is the designated initializer.
 
- @param frequency The frequency of accelerometer data collection in samples per second (Hz).
+ @param identifier  The unique identifier of the recorder configuration.
+ @param frequency   The frequency of accelerometer data collection in samples per second (Hz).
+ 
 @return An initialized accelerometer recorder configuration.
 */
- (instancetype)initWithFrequency:(double)frequency NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithIdentifier:(NSString *)identifier frequency:(double)frequency NS_DESIGNATED_INITIALIZER;

+/**
+ Returns a new accelerometer recorder configuration initialized from data in the given unarchiver.
+ 
+ @param aDecoder    Coder from which to initialize the accelerometer recorder configuration.
+ 
+ @return A new accelerometer recorder configuration.
+ */
 - (instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

@end


-
 /**
 The `ORKAudioRecorderConfiguration` class represents a configuration that records
 audio data during an active step.
@@ -159,10 +183,20 @@ ORK_CLASS_AVAILABLE
 
 For information on the settings available for an audio recorder, see "AV Foundation Audio Settings Constants".
 
- @param recorderSettings The settings for the recording session.
+ @param identifier          The unique identifier of the recorder configuration.
+ @param recorderSettings    The settings for the recording session.
+ 
+ @return An initialized audio recorder configuration.
 */
- (instancetype)initWithRecorderSettings:(NSDictionary *)recorderSettings NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithIdentifier:(NSString *)identifier recorderSettings:(NSDictionary *)recorderSettings NS_DESIGNATED_INITIALIZER;

+/**
+ Returns a new audio recorder configuration initialized from data in the given unarchiver.
+ 
+ @param aDecoder    Coder from which to initialize the audio recorder configuration.
+ 
+ @return A new audio recorder configuration.
+ */
 - (instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

@end
@@ -196,17 +230,25 @@ ORK_CLASS_AVAILABLE
 
 This method is the designated initializer.
 
- @param frequency    Motion data collection frequency in samples per second (Hz).
+ @param identifier  The unique identifier of the recorder configuration.
+ @param frequency   Motion data collection frequency in samples per second (Hz).
+ 
 @return An initialized device motion recorder configuration.
 */
- (instancetype)initWithFrequency:(double)frequency NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithIdentifier:(NSString *)identifier frequency:(double)frequency NS_DESIGNATED_INITIALIZER;

+/**
+ Returns a new device motion recorder configuration initialized from data in the given unarchiver.
+ 
+ @param aDecoder    Coder from which to initialize the device motion recorder configuration.
+ 
+ @return A new device motion recorder configuration.
+ */
 - (instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

@end


-
 /**
 The `ORKPedometerRecorderConfiguration` class represents a configuration
 that records pedometer data during an active step.
@@ -228,17 +270,30 @@ ORK_CLASS_AVAILABLE

 /**
 Returns an initialized pedometer recorder configuration.
- 
- This method is the designated initializer.
- 
- Note that the recorder instantiates a `CMPedometer` object, so no parameters are required.
- */
- (instancetype)init NS_DESIGNATED_INITIALIZER;

+ The recorder instantiates a `CMPedometer` object, so no additional parameters besides
+ the identifier are required.
+
+ This method is the designated initializer.
+
+ @param identifier   The unique identifier of the recorder configuration.
+ 
+ @return An initialized pedometer recorder configuration.
+ */
+- (instancetype)initWithIdentifier:(NSString *)identifier NS_DESIGNATED_INITIALIZER;
+
+/**
+ Returns a new pedometer recorder configuration initialized from data in the given unarchiver.
+ 
+ @param aDecoder    Coder from which to initialize the pedometer recorder configuration.
+ 
+ @return A new pedometer recorder configuration.
+ */
 - (instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

@end

+
 /**
 The `ORKLocationRecorderConfiguration` class represents a configuration
 that records location data during an active step.
@@ -255,6 +310,8 @@ ORK_CLASS_AVAILABLE
 To use a recorder, include its configuration in the `recorderConfigurations` property
 of an `ORKActiveStep` object, include that step in a task, and present it with
 a task view controller.
+ 
+ No additional parameters besides the identifier are required.
 */
 ORK_CLASS_AVAILABLE
@interface ORKLocationRecorderConfiguration : ORKRecorderConfiguration
@@ -263,10 +320,20 @@ ORK_CLASS_AVAILABLE
 Returns an initialized location recorder configuration.
 
 This method is the designated initializer.
+
+ @param identifier   The unique identifier of the recorder configuration.
 
- No parameters are required.
+ @return An initialized location recorder configuration.
+ */
+- (instancetype)initWithIdentifier:(NSString *)identifier NS_DESIGNATED_INITIALIZER;
+
+/**
+ Returns a new location recorder configuration initialized from data in the given unarchiver.
+ 
+ @param aDecoder    Coder from which to initialize the location recorder configuration.
+ 
+ @return A new location recorder configuration.
 */
- (instancetype)init NS_DESIGNATED_INITIALIZER;
 - (instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

@end
@@ -294,12 +361,21 @@ ORK_CLASS_AVAILABLE
 
 This method is the designated initializer.
 
+ @param identifier      The unique identifier of the recorder configuration.
 @param quantityType    The quantity type that should be collected during the active task.
 @param unit            The unit for the data that should be collected and serialized.
+ 
 @return An initialized health quantity type recorder configuration.
 */
- (instancetype)initWithHealthQuantityType:(HKQuantityType *)quantityType unit:(HKUnit *)unit NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithIdentifier:(NSString *)identifier healthQuantityType:(HKQuantityType *)quantityType unit:(HKUnit *)unit NS_DESIGNATED_INITIALIZER;

+/**
+ Returns a new health quantity type recorder configuration initialized from data in the given unarchiver.
+ 
+ @param aDecoder    Coder from which to initialize the health quantity type recorder configuration.
+ 
+ @return A new health quantity type recorder configuration.
+ */
 - (instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

 /**
@@ -307,7 +383,6 @@ ORK_CLASS_AVAILABLE
 */
@property (nonatomic, readonly, copy) HKQuantityType *quantityType;

-
 /**
 The unit in which to serialize the data from HealthKit. (read-only)
 */
@@ -315,6 +390,7 @@ ORK_CLASS_AVAILABLE

@end

+
 /**
 The `ORKRecorderDelegate` protocol defines methods that the delegate of an `ORKRecorder` object should use to handle errors and log the
 completed results.
@@ -346,6 +422,7 @@ need to implement it.

@end

+
 /**
 A recorder is the runtime companion to an `ORKRecorderConfiguration` object, and is
 usually generated by one.
@@ -369,12 +446,27 @@ need to implement it.
 ORK_CLASS_AVAILABLE
@interface ORKRecorder : NSObject

+ (instancetype)new NS_UNAVAILABLE;
 - (instancetype)init NS_UNAVAILABLE;

 /// @name Configuration

@property (nonatomic, weak, nullable) id<ORKRecorderDelegate> delegate;

+/**
+ A short string that uniquely identifies the recorder (usually assigned by the recorder configuration).
+ 
+ The identifier is reproduced in the results of a recorder created from this configuration. In fact, the only way to link a result
+ (an `ORKFileResult` object) to the recorder that generated it is to look at the value of
+ `identifier`. To accurately identify recorder results, you need to ensure that recorder identifiers
+ are unique within each step.
+ 
+ In some cases, it can be useful to link the recorder identifier to a unique identifier in a
+ database; in other cases, it can make sense to make the identifier human
+ readable.
+ */
+@property (nonatomic, copy, readonly) NSString *identifier;
+
 /**
 The step that produced this recorder, configured during initialization.
 */
@@ -425,4 +517,3 @@ ORK_CLASS_AVAILABLE
@end

 NS_ASSUME_NONNULL_END
-
@@ -1,5 +1,6 @@
 /*
 Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, Ricardo Sánchez-Sáez.
 
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
@@ -36,27 +37,36 @@
 #import "ORKDataLogger.h"
 #import "ORKDefines_Private.h"

+
@implementation ORKRecorderConfiguration

- (instancetype)ork_init
-{
-    return [super init];
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    self = [super init];
+    if (self) {
+        if (nil == identifier) {
+            @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"identifier cannot be nil." userInfo:nil];
+        }
+        _identifier = [identifier copy];
+    }
+    return self;
 }

- (instancetype)initWithCoder:(NSCoder *)aDecoder
-{
-    return [super init];
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+    self = [super init];
+    if (self) {
+        ORK_DECODE_OBJ_CLASS(aDecoder, identifier, NSString);
+    }
+    return self;
 }

- (void)encodeWithCoder:(NSCoder *)aCoder
-{
+- (void)encodeWithCoder:(NSCoder *)aCoder {
+    ORK_ENCODE_OBJ(aCoder, identifier);
 }

 - (BOOL)isEqual:(id)object {
    if ([self class] != [object class]) {
        return NO;
    }
-    
    return YES;
 }

@@ -64,17 +74,14 @@
    return 0;
 }

-+ (BOOL)supportsSecureCoding
-{
+ (BOOL)supportsSecureCoding {
    return YES;
 }

- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory
-{
+- (ORKRecorder *)recorderForStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
    return nil;
 }

-
 - (NSSet *)requestedHealthKitTypesForReading {
    return nil;
 }
@@ -82,30 +89,26 @@
    return ORKPermissionNone;
 }

-
@end

-@implementation ORKRecorder
-{
+
+@implementation ORKRecorder {
    UIBackgroundTaskIdentifier _backgroundTask;
    NSUUID *_recorderUUID;
 }

- (instancetype)init
-{
+- (instancetype)init {
    @throw [NSException exceptionWithName:NSGenericException reason:@"Use designated initializer" userInfo:nil];
 }

- (instancetype)ork_init
-{
-    return [super init];
-}
-
- (instancetype)initWithStep:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory;
-{
+- (instancetype)initWithIdentifier:(NSString *)identifier step:(ORKStep *)step outputDirectory:(NSURL *)outputDirectory {
    self = [super init];
-    if (self)
-    {
+    if (self) {
+        if (nil == identifier) {
+            @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"identifier cannot be nil." userInfo:nil];
+        }
+        
+        _identifier = [identifier copy];
        _outputDirectory = outputDirectory;
        self.step = step;
        _backgroundTask = NSNotFound;
@@ -115,91 +118,70 @@
 }

 - (void)viewController:(UIViewController *)viewController willStartStepWithView:(UIView *)view {
-
 }

- (void)start
-{
-    if (self.continuesInBackground)
-    {
+- (void)start {
+    if (self.continuesInBackground) {
        UIApplication *app = [UIApplication sharedApplication];
        UIBackgroundTaskIdentifier oldTask = _backgroundTask;
-        _backgroundTask = [app beginBackgroundTaskWithName:[NSString stringWithFormat:@"%@.%p",NSStringFromClass([self class]),self] expirationHandler:^{
+        _backgroundTask = [app beginBackgroundTaskWithName:[NSString stringWithFormat:@"%@.%p",NSStringFromClass([self class]),self]
+                                         expirationHandler:^{
            [self stop];
        }];
-        if (oldTask != NSNotFound)
-        {
+        if (oldTask != NSNotFound) {
            [app endBackgroundTask:oldTask];
        }
    }
-    
    self.startDate = [NSDate date];
 }

-
- (void)stop
-{
+- (void)stop {
    [self finishRecordingWithError:nil];
    [self reset];
 }

-
- (void)finishRecordingWithError:(NSError *)error
-{
+- (void)finishRecordingWithError:(NSError *)error {
    // NOTE. This method may be called multiple times (once when someone tries
    // to finish, and another time with -stop is actually called.
    
-    
-    if (error)
-    {
+    if (error) {
        // ALWAYS report errors to the delegate, even if we think we're finished already
-        
        id<ORKRecorderDelegate> localDelegate = self.delegate;
-        if (localDelegate && [localDelegate respondsToSelector:@selector(recorder:didFailWithError:)])
-        {
+        if (localDelegate && [localDelegate respondsToSelector:@selector(recorder:didFailWithError:)]) {
            [localDelegate recorder:self didFailWithError:error];
        }
-        
        [self reset];
    }
    
-    
-    if (_backgroundTask != NSNotFound)
-    {
+    if (_backgroundTask != NSNotFound) {
        // End the background task asynchronously, so whatever we're doing cleaning up the recorder has a chance to complete.
-        UIBackgroundTaskIdentifier ident = _backgroundTask;
+        UIBackgroundTaskIdentifier identifier = _backgroundTask;
        _backgroundTask = NSNotFound;
        
        // Hold the background task for a little extra to give time for the next step to kick in,
        // if it is an automatic transition.
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
-            [[UIApplication sharedApplication] endBackgroundTask:ident];
+            [[UIApplication sharedApplication] endBackgroundTask:identifier];
        });
    }
-    
 }

- (NSURL *)recordingDirectoryURL
-{
+- (NSURL *)recordingDirectoryURL {
    if (! _outputDirectory) {
        return nil;
    }
-    
    return [NSURL fileURLWithPath:[_outputDirectory.path stringByAppendingPathComponent:[NSString stringWithFormat:@"recorder-%@",[_recorderUUID UUIDString]]]];
 }

- (NSString *)recorderType
-{
+- (NSString *)recorderType {
    return @"recorder";
 }

- (NSString *)logName
-{
-    return [NSString stringWithFormat:@"%@_%@", [self recorderType],self.step.identifier];
+- (NSString *)logName {
+    return [NSString stringWithFormat:@"%@_%@", [self recorderType],self.identifier];
 }

- (ORKDataLogger *)makeJSONDataLoggerWithError:(NSError * __autoreleasing *)error
-{
+- (ORKDataLogger *)makeJSONDataLoggerWithError:(NSError * __autoreleasing *)error {
    NSURL *workingDir = [self recordingDirectoryURL];
    if (! workingDir) {
        if (error) {
@@ -211,8 +193,8 @@
        return nil;
    }
    
-    NSString *ident = [self logName];
-    NSString *logName = [ident stringByReplacingOccurrencesOfString:@"-" withString:@"_"];
+    NSString *identifier = [self logName];
+    NSString *logName = [identifier stringByReplacingOccurrencesOfString:@"-" withString:@"_"];
    
    // Class B data protection for temporary file during active task logging.
    ORKDataLogger *logger = [[ORKDataLogger alloc] initWithDirectory:workingDir logName:logName formatter:[ORKJSONLogFormatter new] delegate:nil];
@@ -221,8 +203,7 @@
    return logger;
 }

- (void)reset
-{
+- (void)reset {
    _recorderUUID = [NSUUID UUID];
 }

@@ -235,9 +216,9 @@
 }

 - (void)applyFileProtection:(ORKFileProtectionMode)fileProtection toFileAtURL:(NSURL *)url {
-    NSFileManager *fm = [NSFileManager defaultManager];
+    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error = nil;
-    if (!  [fm setAttributes:@{NSFileProtectionKey : ORKFileProtectionFromMode(fileProtection)} ofItemAtPath:[url path] error:&error]) {
+    if (!  [fileManager setAttributes:@{NSFileProtectionKey : ORKFileProtectionFromMode(fileProtection)} ofItemAtPath:[url path] error:&error]) {
        ORK_Log_Debug(@"Error setting %@ on %@: %@", ORKFileProtectionFromMode(fileProtection), url, error);
    }
 }
@@ -247,7 +228,7 @@
    id<ORKRecorderDelegate> localDelegate = self.delegate;
    if (fileUrl && !error) {
        if (localDelegate && [localDelegate respondsToSelector:@selector(recorder:didCompleteWithResult:)]) {
-            ORKFileResult *result = [[ORKFileResult alloc] initWithIdentifier:(NSString *__nonnull)self.step.identifier];
+            ORKFileResult *result = [[ORKFileResult alloc] initWithIdentifier:self.identifier];
            result.contentType = [self mimeType];
            result.fileURL = fileUrl;
            result.userInfo = [self userInfo];
@@ -259,8 +240,7 @@
            [self reset];
        }
    } else {
-        if (! error)
-        {
+        if (! error) {
            error = [NSError errorWithDomain:NSCocoaErrorDomain
                                        code:NSFileReadNoSuchFileError
                                    userInfo:@{NSLocalizedDescriptionKey:ORKLocalizedString(@"ERROR_RECORDER_NO_DATA", nil)}];
@@ -270,4 +250,3 @@
 }

@end
-
@@ -31,22 +31,18 @@

 #import <ResearchKit/ORKRecorder.h>

+
 NS_ASSUME_NONNULL_BEGIN

@class ORKDataLogger;

-@interface ORKRecorderConfiguration()
-
- (instancetype)ork_init;  
+@interface ORKRecorderConfiguration ()

@end


-
@interface ORKRecorder ()

- (instancetype)ork_init;
-
@property (nonatomic, strong, nullable) ORKStep *step;

@property (nonatomic, strong, nullable) ORKRecorderConfiguration *configuration;
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ORKRecorder.h>

+
 NS_ASSUME_NONNULL_BEGIN

@class ORKStep;
@@ -41,18 +43,45 @@ NS_ASSUME_NONNULL_BEGIN
 It is currently considered private, and is not used in any of the active tasks.
 */
 ORK_CLASS_AVAILABLE
-@interface ORKTouchRecorderConfiguration: ORKRecorderConfiguration
+@interface ORKTouchRecorderConfiguration : ORKRecorderConfiguration

- (instancetype)init;
+/**
+ Returns an initialized touch recorder configuration.
+ 
+ This method is the designated initializer.
+ 
+ @param identifier   The unique identifier of the recorder configuration.
+ 
+ @return An initialized touch recorder configuration.
+ */
+- (instancetype)initWithIdentifier:(NSString *)identifier NS_DESIGNATED_INITIALIZER;
+
+/**
+ Returns a new touch recorder configuration initialized from data in the given unarchiver.
+ 
+ @param aDecoder    Coder from which to initialize the touch recorder configuration.
+ 
+ @return A new touch recorder configuration.
+ */
+- (instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

@end


-@interface ORKRecorder()
-
- (instancetype)initWithStep:(nullable ORKStep *)step
-             outputDirectory:(nullable NSURL *)outputDirectory;
+@interface ORKRecorder ()

+/**
+ Returns an initialized recorder.
+ 
+ This method is the designated initializer.
+ 
+ @param identifier          The unique identifier of the recorder.
+ @param step                The step for which this recorder is being created.
+ @param outputDirectory     The directory in which all output file data should be written (if producing `ORKFileResult` instances).
+ 
+ @return An initialized recorder.
+ */
+- (instancetype)initWithIdentifier:(NSString *)identifier step:(nullable ORKStep *)step outputDirectory:(nullable NSURL *)outputDirectory;

 /**
 A preparation step to provide viewController and view before record starting.
@@ -87,7 +116,27 @@ ORK_CLASS_AVAILABLE
@end


-@interface ORKRecorderConfiguration()
+@interface ORKRecorderConfiguration ()
+
+/**
+ Returns an initialized recorder configuration.
+ 
+ This method is the designated initializer.
+ 
+ @param identifier   The unique identifier of the recorder configuration.
+ 
+ @return An initialized recorder configuration.
+ */
+- (instancetype)initWithIdentifier:(NSString *)identifier NS_DESIGNATED_INITIALIZER;
+
+/**
+ Returns a new recorder configuration initialized from data in the given unarchiver.
+ 
+ @param aDecoder    Coder from which to initialize the recorder configuration.
+ 
+ @return A new recorder configuration.
+ */
+- (instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

 /**
 Returns the permission mask indicating the permissions required for this configuration.
@@ -96,7 +145,6 @@ ORK_CLASS_AVAILABLE
 */
 - (ORKPermissionMask)requestedPermissionMask;

-
@end

 NS_ASSUME_NONNULL_END
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <Foundation/Foundation.h>


@@ -36,7 +37,6 @@
 
 A game consists of a subset of a permutation of the integers [0 .. gameSize-1],
 which represent the sequence of targets that should be tapped.
- 
 */
@interface ORKSpatialSpanGame : NSObject

@@ -64,12 +64,12 @@
 /**
 Enumerates the sequence, calling the block once for each element.
 
- @param handler The block to be called for each element in the sequence. The `handler` block takes the following parameters:
+ @param handler     The block to be called for each element in the sequence. The `handler` block takes the following parameters:
 
- `step`  The step in the sequence. The step starts at 0 and increments by one on each call.
- `tileIndex` The index in [ 0 .. gameSize ] that corresponds to the step's element of the sequence.
- `isLastStep` A Boolean value that indicates if this is the last step in the sequence.
-  `stop`   A Boolean value that indicates if the enumeration should be terminated (pass `NO` to terminate the enumeration).
+ `step`         The step in the sequence. The step starts at 0 and increments by one on each call.
+ `tileIndex`    The index in [ 0 .. gameSize ] that corresponds to the step's element of the sequence.
+ `isLastStep`   A Boolean value that indicates if this is the last step in the sequence.
+ `stop`         A Boolean value that indicates if the enumeration should be terminated (pass `NO` to terminate the enumeration).
 */

 - (void)enumerateSequenceWithHandler:(void(^)(NSInteger step, NSInteger tileIndex, BOOL isLastStep, BOOL *stop))handler;
@@ -77,5 +77,4 @@
 /// Returns the value of the specified step in the sequence.
 - (NSInteger)tileIndexForStep:(NSInteger)step;

-
@end
@@ -28,10 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKSpatialSpanGame.h"

-@implementation ORKSpatialSpanGame
-{
+
+@implementation ORKSpatialSpanGame {
    NSInteger *_sequence;
 }

@@ -81,13 +82,10 @@
        if (_sequence == NULL) {
            self = nil;
        }
-        
    }
    return self;
 }

-
-
 /// Step parameter is the step in the sequence; tileIndex is the value of that step of the sequence.
 - (void)enumerateSequenceWithHandler:(void(^)(NSInteger step, NSInteger tileIndex, BOOL isLastStep, BOOL *stop))handler {
    BOOL stop = NO;
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <Foundation/Foundation.h>
 #import "ORKSpatialSpanTargetView.h"

+
 NS_ASSUME_NONNULL_BEGIN

@class ORKSpatialSpanGame;
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKSpatialSpanGameState.h"
 #import "ORKSpatialSpanGame.h"

@@ -37,7 +38,6 @@
    ORKSpatialSpanTargetState *_states;
 }

-
 - (instancetype)initWithGame:(ORKSpatialSpanGame *)game {
    self = [super init];
    if (self) {
@@ -59,7 +59,6 @@
    }
 }

-
 - (void)reset {
    const NSInteger gameSize = [_game gameSize];
    for (NSInteger tileIndex = 0; tileIndex < gameSize; tileIndex++) {
@@ -98,7 +97,6 @@
    return correct ? ORKSpatialSpanResultCorrect : ORKSpatialSpanResultIncorrect;
 }

-
 - (NSInteger)currentStepIndex {
    return [_plays count];
 }
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKCustomStepView_Internal.h"
 #import "ORKSpatialSpanTargetView.h"

+
 NS_ASSUME_NONNULL_BEGIN

 typedef struct {
@@ -46,6 +48,7 @@ typedef struct {

@end

+
@interface ORKSpatialSpanMemoryGameView : UIView <ORKSpatialSpanTargetViewDelegate>

@property (nonatomic, weak, nullable) id<ORKSpatialSpanMemoryGameViewDelegate> delegate;
@@ -68,7 +71,7 @@ typedef struct {

@interface ORKSpatialSpanMemoryContentView : ORKActiveStepCustomView

-@property (nonatomic, readonly, strong) ORKSpatialSpanMemoryGameView *gameView;
+@property (nonatomic, strong, readonly) ORKSpatialSpanMemoryGameView *gameView;

@property (nonatomic, assign, getter=isFooterHidden) BOOL footerHidden;

@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKSpatialSpanMemoryContentView.h"
 #import "ORKSpatialSpanTargetView.h"
 #import "ORKActiveStepQuantityView.h"
@@ -122,20 +123,20 @@
 - (void)layoutSubviews {
    [super layoutSubviews];
    
-    CGRect bds = [self bounds];
-    CGFloat gridItemEdgeLength =  ORKFloorToViewScale(MIN(bds.size.width / _gridSize.width, bds.size.height / _gridSize.height), self);
+    CGRect bounds = [self bounds];
+    CGFloat gridItemEdgeLength =  ORKFloorToViewScale(MIN(bounds.size.width / _gridSize.width, bounds.size.height / _gridSize.height), self);
    
    gridItemEdgeLength = MIN(gridItemEdgeLength, 114);
    CGSize gridItemSize = (CGSize){gridItemEdgeLength, gridItemEdgeLength};
    
    CGPoint centeringOffset = CGPointZero;
-    centeringOffset.x = 0.5*(bds.size.width - (gridItemSize.width * _gridSize.width));
-    centeringOffset.y = 0.5*(bds.size.height - (gridItemSize.height * _gridSize.height));
+    centeringOffset.x = 0.5*(bounds.size.width - (gridItemSize.width * _gridSize.width));
+    centeringOffset.y = 0.5*(bounds.size.height - (gridItemSize.height * _gridSize.height));
    
    NSInteger tileIndex = 0;
    for (NSInteger x = 0; x < _gridSize.width; x++) {
        for (NSInteger y = 0; y < _gridSize.height; y++) {
-            ORKSpatialSpanTargetView *targetView = [_tileViews objectAtIndex:tileIndex];
+            ORKSpatialSpanTargetView *targetView = _tileViews[tileIndex];
            
            CGPoint origin = (CGPoint){.x = ORKFloorToViewScale(centeringOffset.x + x * gridItemSize.width, self),
                .y = ORKFloorToViewScale(centeringOffset.y + y * gridItemSize.height, self)};
@@ -147,12 +148,12 @@
 }

 - (void)setState:(ORKSpatialSpanTargetState)state forTileIndex:(NSInteger)tileIndex animated:(BOOL)animated {
-    ORKSpatialSpanTargetView *view = [_tileViews objectAtIndex:tileIndex];
+    ORKSpatialSpanTargetView *view = _tileViews[tileIndex];
    [view setState:state animated:animated];
 }

 - (ORKSpatialSpanTargetState)stateForTileIndex:(NSInteger)tileIndex {
-    return [(ORKSpatialSpanTargetView *)[_tileViews objectAtIndex:tileIndex] state];
+    return [(ORKSpatialSpanTargetView *)_tileViews[tileIndex] state];
 }

 #pragma mark Accessibility
@@ -163,6 +164,7 @@

@end

+
@implementation ORKSpatialSpanMemoryContentView {
    ORKQuantityPairView *_quantityPairView;
    ORKNavigationContainerView *_continueView;
@@ -219,7 +221,6 @@
        [self countView].backgroundColor = [[UIColor purpleColor] colorWithAlphaComponent:0.2];
 #endif
        
-        
        [self setNeedsUpdateConstraints];
    }
    return self;
@@ -259,7 +260,7 @@


 - (void)updateMargins {
-    self.layoutMargins = (UIEdgeInsets){.left=ORKStandardMarginForView(self),.right=ORKStandardMarginForView(self)};
+    self.layoutMargins = (UIEdgeInsets){.left=ORKStandardHorizMarginForView(self), .right=ORKStandardHorizMarginForView(self)};
    _quantityPairView.layoutMargins = self.layoutMargins;
 }

@@ -277,22 +278,57 @@
    
    NSDictionary *views = NSDictionaryOfVariableBindings(_gameView, _quantityPairView, _continueView);
    
-    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(>=0)-[_gameView][_quantityPairView]|" options:NSLayoutFormatAlignAllCenterX metrics:nil views:views]];
-    NSLayoutConstraint *c1 = [NSLayoutConstraint constraintWithItem:_gameView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:1000];
-    c1.priority = UILayoutPriorityDefaultLow-1;
-    [constraints addObject:c1];
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(>=0)-[_gameView][_quantityPairView]|"
+                                                                             options:NSLayoutFormatAlignAllCenterX
+                                                                             metrics:nil
+                                                                               views:views]];
+    NSLayoutConstraint *constraint1 = [NSLayoutConstraint constraintWithItem:_gameView
+                                                          attribute:NSLayoutAttributeHeight
+                                                          relatedBy:NSLayoutRelationEqual
+                                                             toItem:nil
+                                                          attribute:NSLayoutAttributeNotAnAttribute
+                                                         multiplier:1.0
+                                                           constant:1000.0];
+    constraint1.priority = UILayoutPriorityDefaultLow-1;
+    [constraints addObject:constraint1];
    
-    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_gameView]-|" options:(NSLayoutFormatOptions)0 metrics:nil views:views]];
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_gameView]-|"
+                                                                             options:(NSLayoutFormatOptions)0
+                                                                             metrics:nil
+                                                                               views:views]];
    
-    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_quantityPairView]|" options:(NSLayoutFormatOptions)0 metrics:nil views:views]];
-    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_continueView]|" options:(NSLayoutFormatOptions)0 metrics:nil views:views]];
-    [constraints addObject:[NSLayoutConstraint constraintWithItem:_continueView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:_quantityPairView attribute:NSLayoutAttributeBottom multiplier:1 constant:0]];
-    [constraints addObject:[NSLayoutConstraint constraintWithItem:_continueView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:_quantityPairView attribute:NSLayoutAttributeTop multiplier:1 constant:0]];
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_quantityPairView]|"
+                                                                             options:(NSLayoutFormatOptions)0
+                                                                             metrics:nil
+                                                                               views:views]];
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_continueView]|"
+                                                                             options:(NSLayoutFormatOptions)0
+                                                                             metrics:nil
+                                                                               views:views]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_continueView
+                                                        attribute:NSLayoutAttributeBottom
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:_quantityPairView
+                                                        attribute:NSLayoutAttributeBottom
+                                                       multiplier:1.0
+                                                         constant:0.0]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_continueView
+                                                        attribute:NSLayoutAttributeTop
+                                                        relatedBy:NSLayoutRelationGreaterThanOrEqual
+                                                           toItem:_quantityPairView
+                                                        attribute:NSLayoutAttributeTop
+                                                       multiplier:1.0
+                                                         constant:0.0]];
    
-    NSLayoutConstraint *maxWidthConstraint = [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:10000];
+    NSLayoutConstraint *maxWidthConstraint = [NSLayoutConstraint constraintWithItem:self
+                                                                          attribute:NSLayoutAttributeWidth
+                                                                          relatedBy:NSLayoutRelationEqual
+                                                                             toItem:nil
+                                                                          attribute:NSLayoutAttributeNotAnAttribute
+                                                                         multiplier:1.0
+                                                                           constant:ORKScreenMetricMaxDimension];
    maxWidthConstraint.priority = UILayoutPriorityRequired-1;
    [constraints addObject:maxWidthConstraint];
-
    
    [NSLayoutConstraint activateConstraints:constraints];
    _constraints = constraints;
@@ -300,6 +336,4 @@
    [super updateConstraints];
 }

-
-
@end
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit_Private.h>

+
 NS_ASSUME_NONNULL_BEGIN

 ORK_CLASS_AVAILABLE
@@ -28,11 +28,13 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKSpatialSpanMemoryStep.h"
 #import "ORKSpatialSpanMemoryStepViewController.h"
 #import "ORKHelpers.h"
 #import "ORKStep_Private.h"

+
@implementation ORKSpatialSpanMemoryStep

 + (Class)stepViewControllerClass {
@@ -41,13 +43,14 @@

 - (instancetype)initWithIdentifier:(NSString *)identifier {
    self = [super initWithIdentifier:identifier];
-    self.shouldStartTimerAutomatically = YES;
-    self.shouldContinueOnFinish = YES;
+    if (self) {
+        self.shouldStartTimerAutomatically = YES;
+        self.shouldContinueOnFinish = YES;
+    }
    return self;
 }

- (instancetype)copyWithZone:(NSZone *)zone
-{
+- (instancetype)copyWithZone:(NSZone *)zone {
    ORKSpatialSpanMemoryStep *step = [super copyWithZone:zone];
    step.initialSpan = self.initialSpan;
    step.minimumSpan = self.minimumSpan;
@@ -62,7 +65,6 @@
 }

 - (void)validateParameters {
-    
    [super validateParameters];
    
    NSInteger const ORKSpatialSpanMemoryTaskMinimumInitialSpan = 2;
@@ -72,53 +74,45 @@
    NSInteger const ORKSpatialSpanMemoryTaskMinimumMaxTests = 1;
    NSInteger const ORKSpatialSpanMemoryTaskMinimumMaxConsecutiveFailures = 1;
    
-    if ( self.initialSpan < ORKSpatialSpanMemoryTaskMinimumInitialSpan)
-    {
+    if ( self.initialSpan < ORKSpatialSpanMemoryTaskMinimumInitialSpan) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException
                                       reason:[NSString stringWithFormat:@"initialSpan can not be less than %@.", @(ORKSpatialSpanMemoryTaskMinimumInitialSpan)]
                                     userInfo:nil];
    }
    
-    if ( self.minimumSpan > self.initialSpan)
-    {
+    if ( self.minimumSpan > self.initialSpan) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"initialSpan can not be less than minimumSpan." userInfo:nil];
    }
    
-    if ( self.initialSpan > self.maximumSpan)
-    {
+    if ( self.initialSpan > self.maximumSpan) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"maximumSpan can not be less than initialSpan." userInfo:nil];
    }
    
-    if ( self.maximumSpan > ORKSpatialSpanMemoryTaskMaximumSpan)
-    {
+    if ( self.maximumSpan > ORKSpatialSpanMemoryTaskMaximumSpan) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException
                                       reason:[NSString stringWithFormat:@"maximumSpan can not be more than %@.", @(ORKSpatialSpanMemoryTaskMaximumSpan)]
                                     userInfo:nil];
    }
    
-    if  (self.playSpeed < ORKSpatialSpanMemoryTaskMinimumPlaySpeed)
-    {
+    if  (self.playSpeed < ORKSpatialSpanMemoryTaskMinimumPlaySpeed) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException
                                       reason:[NSString stringWithFormat:@"playSpeed can not be shorter than %@ seconds.", @(ORKSpatialSpanMemoryTaskMinimumPlaySpeed)]
                                     userInfo:nil];
    }
    
-    if  (self.playSpeed > ORKSpatialSpanMemoryTaskMaximumPlaySpeed)
-    {
+    if  (self.playSpeed > ORKSpatialSpanMemoryTaskMaximumPlaySpeed) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException
                                       reason:[NSString stringWithFormat:@"playSpeed can not be longer than %@ seconds.", @(ORKSpatialSpanMemoryTaskMaximumPlaySpeed)]
                                     userInfo:nil];
    }
    
-    if  (self.maxTests < ORKSpatialSpanMemoryTaskMinimumMaxTests)
-    {
+    if  (self.maxTests < ORKSpatialSpanMemoryTaskMinimumMaxTests) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException
                                       reason:[NSString stringWithFormat:@"maxTests can not be less than %@.", @(ORKSpatialSpanMemoryTaskMinimumMaxTests)]
                                     userInfo:nil];
    }
    
-    if  (self.maxConsecutiveFailures < ORKSpatialSpanMemoryTaskMinimumMaxConsecutiveFailures)
-    {
+    if  (self.maxConsecutiveFailures < ORKSpatialSpanMemoryTaskMinimumMaxConsecutiveFailures) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException
                                       reason:[NSString stringWithFormat:@"maxConsecutiveFailures can not be less than %@.", @(ORKSpatialSpanMemoryTaskMinimumMaxConsecutiveFailures)]
                                     userInfo:nil];
@@ -129,11 +123,9 @@
    return NO;
 }

- (instancetype)initWithCoder:(NSCoder *)aDecoder
-{
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
-    if (self)
-    {
+    if (self) {
        ORK_DECODE_INTEGER(aDecoder, initialSpan);
        ORK_DECODE_INTEGER(aDecoder, minimumSpan);
        ORK_DECODE_INTEGER(aDecoder, maximumSpan);
@@ -147,8 +139,7 @@
    return self;
 }

- (void)encodeWithCoder:(NSCoder *)aCoder
-{
+- (void)encodeWithCoder:(NSCoder *)aCoder {
    [super encodeWithCoder:aCoder];
    ORK_ENCODE_INTEGER(aCoder, initialSpan);
    ORK_ENCODE_INTEGER(aCoder, minimumSpan);
@@ -161,12 +152,10 @@
    ORK_ENCODE_OBJ(aCoder, customTargetPluralName);
 }

-+ (BOOL)supportsSecureCoding
-{
+ (BOOL)supportsSecureCoding {
    return YES;
 }

-
 - (BOOL)isEqual:(id)object {
    BOOL isParentSame = [super isEqual:object];
    
@@ -179,14 +168,11 @@
            (self.maxTests == castObject.maxTests) &&
            (self.maxConsecutiveFailures == castObject.maxConsecutiveFailures) &&
            (ORKEqualObjects(self.customTargetPluralName, castObject.customTargetPluralName)) &&
-            (self.requireReversal == castObject.requireReversal)) ;
+            (self.requireReversal == castObject.requireReversal));
 }

-
-
 - (BOOL)allowsBackNavigation {
    return NO;
 }

@end
-
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit_Private.h>

+
 /**
 View controller corresponding to `ORKSpatialSpanMemoryStep`.
 */
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKSpatialSpanMemoryStepViewController.h"
 #import "ORKHelpers.h"
 #import "ORKActiveStep_Internal.h"
@@ -45,6 +46,7 @@
 #import "ORKSpatialSpanMemoryStep.h"
 #import "ORKActiveStepView.h"

+
 static const NSTimeInterval kMemoryGameActivityTimeout = 20;

 typedef NS_ENUM(NSInteger, ORKSpatialSpanStepState) {
@@ -83,6 +85,7 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con

@end

+
@implementation ORKState;

 + (ORKState *)stateWithState:(NSInteger)state entryHandler:(_ORKStateHandler)entryHandler exitHandler:(_ORKStateHandler)exitHandler context:(id)context {
@@ -94,15 +97,15 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    return s;
 }

+@end
+
+
+@interface ORKSpatialSpanMemoryStepViewController () <ORKSpatialSpanMemoryGameViewDelegate>

@end

-@interface ORKSpatialSpanMemoryStepViewController() <ORKSpatialSpanMemoryGameViewDelegate>

-@end
-
-@implementation ORKSpatialSpanMemoryStepViewController
-{
+@implementation ORKSpatialSpanMemoryStepViewController {
    ORKSpatialSpanMemoryContentView *_contentView;
    ORKState *_state;
    NSDictionary *_states;
@@ -126,7 +129,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    
    NSTimer *_playbackTimer;
    NSTimer *_activityTimer;
-
 }

 - (ORKSpatialSpanMemoryStep *)spatialSpanStep {
@@ -134,7 +136,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
 }

 - (instancetype)initWithStep:(ORKStep *)step {
-    
    self = [super initWithStep:step];
    if (self) {
        self.suspendIfInactive = YES;
@@ -144,7 +145,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con

 #pragma mark Overrides

-
 - (void)viewDidLoad {
    [super viewDidLoad];
    
@@ -154,7 +154,7 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    _contentView.gameView.delegate = self;
    self.activeStepView.activeCustomView = _contentView;
    self.activeStepView.stepViewFillsAvailableSpace = NO;
-    self.activeStepView.minimumStepHeaderHeight = ORKGetMetricForScreenType(ORKScreenMetricMinimumStepHeaderHeightForMemoryGame, ORKGetScreenTypeForWindow(self.view.window));
+    self.activeStepView.minimumStepHeaderHeight = ORKGetMetricForWindow(ORKScreenMetricMinimumStepHeaderHeightForMemoryGame, self.view.window);
    
    [self resetUI];
    
@@ -162,7 +162,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    [self.activeStepView addGestureRecognizer:tapGestureRecognizer];
 }

-
 - (void)stepDidChange {
    [super stepDidChange];
    
@@ -179,6 +178,7 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    
    [self transitionToState:ORKSpatialSpanStepStatePlayback];
 }
+
 - (void)suspend {
    [super suspend];
    switch (_state.state) {
@@ -190,26 +190,27 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
            break;
    }
 }
+
 - (void)resume {
    [super resume];
 }
+
 - (void)finish {
    [super finish];
    [self transitionToState:ORKSpatialSpanStepStateStopped];
 }

-
 - (ORKStepResult *)result {
-    ORKStepResult *sResult = [super result];
+    ORKStepResult *stepResult = [super result];
    
    // "Now" is the end time of the result, which is either actually now,
    // or the last time we were in the responder chain.
-    NSDate *now = sResult.endDate;
+    NSDate *now = stepResult.endDate;
    
-    NSMutableArray *results = [NSMutableArray arrayWithArray:sResult.results];
+    NSMutableArray *results = [NSMutableArray arrayWithArray:stepResult.results];
    
-    ORKSpatialSpanMemoryResult *memoryResult = [[ORKSpatialSpanMemoryResult alloc] initWithIdentifier:(NSString *__nonnull)self.step.identifier];
-    memoryResult.startDate = sResult.startDate;
+    ORKSpatialSpanMemoryResult *memoryResult = [[ORKSpatialSpanMemoryResult alloc] initWithIdentifier:self.step.identifier];
+    memoryResult.startDate = stepResult.startDate;
    memoryResult.endDate = now;
    
    NSMutableArray *records = [NSMutableArray new];
@@ -224,8 +225,7 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
            
            score += record.score;
            
-            if (record.gameStatus != ORKSpatialSpanMemoryGameStatusSuccess)
-            {
+            if (record.gameStatus != ORKSpatialSpanMemoryGameStatusSuccess) {
                numberOfFailures++;
            }
        }
@@ -237,9 +237,9 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    memoryResult.gameRecords = [records copy];
    
    [results addObject:memoryResult];
-    sResult.results = [results copy];
+    stepResult.results = [results copy];
    
-    return sResult;
+    return stepResult;
 }

 #pragma mark UpdateGameRecord
@@ -249,7 +249,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
 }

 - (void)createGameRecord {
-    
    if (_gameRecords == nil) {
        _gameRecords = [NSMutableArray new];
    }
@@ -268,8 +267,7 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    _lastRoundScore = _score;
 }

- (void)updateGameRecordTargetRects
-{
+- (void)updateGameRecordTargetRects {
    ORKSpatialSpanMemoryGameRecord *record = [self currentGameRecord];
    NSArray *tileViews = _contentView.gameView.tileViews;
    NSMutableArray *targetRects = [NSMutableArray new];
@@ -281,21 +279,18 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    NSAssert(tileViews.count == 0 || tileViews.count == record.gameSize, nil);
 }

- (void)updateGameRecordOnStartingGamePlay
-{
+- (void)updateGameRecordOnStartingGamePlay {
    _gameStartTime = CACurrentMediaTime();
 }

- (void)handleUserTap:(UITapGestureRecognizer *)tapRecognizer
-{
+- (void)handleUserTap:(UITapGestureRecognizer *)tapRecognizer {
    if (_state.state != ORKSpatialSpanStepStateGameplay) {
        return;
    }
    [self updateGameRecordOnTouch:-1 location:[tapRecognizer locationInView: self.view]];
 }

- (void)updateGameRecordOnTouch:(NSInteger)targetIndex location:(CGPoint)location
-{
+- (void)updateGameRecordOnTouch:(NSInteger)targetIndex location:(CGPoint)location {
    ORKSpatialSpanMemoryGameTouchSample *sample = [ORKSpatialSpanMemoryGameTouchSample new];
    
    sample.timestamp = CACurrentMediaTime() - _gameStartTime;
@@ -321,35 +316,28 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    [sampleArray addObject:sample];
    
    record.touchSamples = [sampleArray copy];
-    
 }

- (void)updateGameRecordOnSuccess
-{
+- (void)updateGameRecordOnSuccess {
    [self currentGameRecord].gameStatus = ORKSpatialSpanMemoryGameStatusSuccess;
 }

- (void)updateGameRecordOnFailure
-{
+- (void)updateGameRecordOnFailure {
    [self currentGameRecord].gameStatus = ORKSpatialSpanMemoryGameStatusFailure;
 }

- (void)updateGameRecordOnTimeout
-{
+- (void)updateGameRecordOnTimeout {
    [self currentGameRecord].gameStatus = ORKSpatialSpanMemoryGameStatusTimeout;
 }

- (void)updateGameRecordScore
-{
+- (void)updateGameRecordScore {
    [self currentGameRecord].score = _score - _lastRoundScore;
 }

- (void)updateGameRecordOnPause
-{
+- (void)updateGameRecordOnPause {
    [self currentGameRecord].gameStatus = ORKSpatialSpanMemoryGameStatusUnknown;
 }

-
 #pragma mark ORKSpatialSpanStepStateInitial

 - (ORKGridSize)gridSizeForSpan:(NSInteger)span {
@@ -397,10 +385,8 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    [self createGameRecord];
    
    [self resetUI];
-    
 }

-
 #pragma mark ORKSpatialSpanStepStatePlayback

 - (void)applyTargetState:(ORKSpatialSpanTargetState)targetState toSequenceIndex:(NSInteger)index duration:(NSTimeInterval)duration {
@@ -454,7 +440,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    
    [self.activeStepView updateTitle:title text:nil];
    
-    
    [_contentView.gameView resetTilesAnimated:NO];
    
    _playbackTimer = [NSTimer scheduledTimerWithTimeInterval:step.playSpeed target:self selector:@selector(playbackNextItem) userInfo:nil repeats:YES];
@@ -521,7 +506,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    _activityTimer = nil;
 }

-
 - (void)gameView:(ORKSpatialSpanMemoryGameView *)gameView didTapTileWithIndex:(NSInteger)tileIndex recognizer:(UITapGestureRecognizer *)recognizer {
    if (_state.state != ORKSpatialSpanStepStateGameplay) {
        return;
@@ -533,6 +517,7 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    switch (result) {
        case ORKSpatialSpanResultIgnore:
            break;
+            
        case ORKSpatialSpanResultCorrect:
            [gameView setState:ORKSpatialSpanTargetStateCorrect forTileIndex:tileIndex animated:YES];
            NSInteger stepIndex = [_currentGameState currentStepIndex];
@@ -544,9 +529,8 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
            if ([_currentGameState isComplete]) {
                [self transitionToState:ORKSpatialSpanStepStateSuccess];
            }
-            
-            
            break;
+            
        case ORKSpatialSpanResultIncorrect:
            [gameView setState:ORKSpatialSpanTargetStateIncorrect forTileIndex:tileIndex animated:YES];
            [self transitionToState:ORKSpatialSpanStepStateFailed];
@@ -557,7 +541,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
 #pragma mark ORKSpatialSpanStepStateSuccess

 - (void)updateGameCountersForSuccess:(BOOL)success {
-    
    ORKSpatialSpanMemoryStep *step = [self spatialSpanStep];
    if (success) {
        NSInteger sequenceLength = [_currentGameState.game sequenceLength];
@@ -573,7 +556,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
 }

 - (void)continueAction {
-    
    ORKSpatialSpanMemoryStep *step = [self spatialSpanStep];
    if (_gamesCounter < step.maxTests && _consecutiveGamesFailed < step.maxConsecutiveFailures) {
        // Generate a new game
@@ -585,7 +567,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
 }

 - (void)showSuccess {
-    
    [self updateGameRecordOnSuccess];
    
    [self updateGameCountersForSuccess:YES];
@@ -593,7 +574,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
        return;
    }
    
-    
    [self.activeStepView updateTitle:ORKLocalizedString(@"MEMORY_GAME_COMPLETE_TITLE", nil) text:ORKLocalizedString(@"MEMORY_GAME_COMPLETE_MESSAGE", nil)];
    
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.75 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
@@ -603,16 +583,13 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con

 #pragma mark ORKSpatialSpanStepStateFailed

-
 - (void)tryAgainAction {
    // Restart with a new, shorter game
    [self transitionToState:ORKSpatialSpanStepStateRestart];
    UIAccessibilityPostNotification(UIAccessibilityScreenChangedNotification, nil);
 }

-
 - (BOOL)finishIfCompletedGames {
-    
    ORKSpatialSpanMemoryStep *step = [self spatialSpanStep];
    if (_consecutiveGamesFailed >= step.maxConsecutiveFailures || _gamesCounter >= step.maxTests) {
        [self transitionToState:ORKSpatialSpanStepStateComplete];
@@ -622,7 +599,6 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
 }

 - (void)showFailed {
-    
    [self updateGameRecordOnFailure];
    
    [self updateGameCountersForSuccess:NO];
@@ -631,14 +607,12 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    }
    [self.activeStepView updateTitle:ORKLocalizedString(@"MEMORY_GAME_FAILED_TITLE", nil) text:ORKLocalizedString(@"MEMORY_GAME_FAILED_MESSAGE", nil)];
    
-    
    _contentView.buttonItem = [[UIBarButtonItem alloc] initWithTitle:ORKLocalizedString(@"BUTTON_NEXT", nil) style:UIBarButtonItemStylePlain target:self action:@selector(tryAgainAction)];
 }

 #pragma mark ORKSpatialSpanStepStateTimeout

 - (void)showTimeout {
-    
    [self updateGameRecordOnTimeout];
    
    [self updateGameCountersForSuccess:NO];
@@ -686,37 +660,36 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    _contentView.buttonItem = [[UIBarButtonItem alloc] initWithTitle:ORKLocalizedString(@"BUTTON_NEXT", nil) style:UIBarButtonItemStylePlain target:self action:@selector(continueAction)];
 }

-
 #pragma mark State machine

 - (void)initializeStates {
    NSMutableDictionary *states = [NSMutableDictionary dictionary];
    
    states[@(ORKSpatialSpanStepStateInitial)] = [ORKState stateWithState:ORKSpatialSpanStepStateInitial
-                                                           entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                               [this resetGameAndUI];
-                                                           }
-                                                            exitHandler:nil context:self];
+                                                            entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                                [this resetGameAndUI];
+                                                            }
+                                                             exitHandler:nil context:self];
    
    states[@(ORKSpatialSpanStepStatePlayback)] = [ORKState stateWithState:ORKSpatialSpanStepStatePlayback
-                                                            entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                     [this startPlayback];
-                                                 }
-                                                             exitHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                     [this finishPlayback];
-                                                 } context:self];
+                                                             entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                                 [this startPlayback];
+                                                             }
+                                                              exitHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                                  [this finishPlayback];
+                                                              } context:self];
    
    states[@(ORKSpatialSpanStepStateGameplay)] = [ORKState stateWithState:ORKSpatialSpanStepStateGameplay
-                                                            entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                                [this startGameplay];
-                                                            }
-                                                             exitHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                                 [this finishGameplay];
-                                                             } context:self];
+                                                             entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                                 [this startGameplay];
+                                                             }
+                                                              exitHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                                  [this finishGameplay];
+                                                              } context:self];
    
    states[@(ORKSpatialSpanStepStateSuccess)] = [ORKState stateWithState:ORKSpatialSpanStepStateSuccess
-                                                           entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                               [this showSuccess];
+                                                            entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                                [this showSuccess];
                                                            }
                                                             exitHandler:nil context:self];
    
@@ -727,31 +700,31 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
                                                            exitHandler:nil context:self];
    
    states[@(ORKSpatialSpanStepStateTimeout)] = [ORKState stateWithState:ORKSpatialSpanStepStateTimeout
-                                                          entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                              [this showTimeout];
-                                                          }
-                                                           exitHandler:nil context:self];
+                                                            entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                                [this showTimeout];
+                                                            }
+                                                             exitHandler:nil context:self];
    
    states[@(ORKSpatialSpanStepStateRestart)] = [ORKState stateWithState:ORKSpatialSpanStepStateRestart
-                                                           entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                               [this doRestart];
-                                                           }
-                                                            exitHandler:nil context:self];
+                                                            entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                                [this doRestart];
+                                                            }
+                                                             exitHandler:nil context:self];
    
    states[@(ORKSpatialSpanStepStateComplete)] = [ORKState stateWithState:ORKSpatialSpanStepStateComplete
-                                                            entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                                [this showComplete];
-                                                            } exitHandler:nil context:self];
+                                                             entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                                 [this showComplete];
+                                                             } exitHandler:nil context:self];
    
    states[@(ORKSpatialSpanStepStateStopped)] = [ORKState stateWithState:ORKSpatialSpanStepStateStopped
-                                                           entryHandler:nil
-                                                            exitHandler:nil
-                                                                context:self];
+                                                            entryHandler:nil
+                                                             exitHandler:nil
+                                                                 context:self];
    
    states[@(ORKSpatialSpanStepStatePaused)] = [ORKState stateWithState:ORKSpatialSpanStepStatePaused
-                                                          entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
-                                                              [this showPausedFromState:from];
-                                                          } exitHandler:nil context:self];
+                                                           entryHandler:^(ORKState *from, ORKState *to, ORKSpatialSpanMemoryStepViewController *this) {
+                                                               [this showPausedFromState:from];
+                                                           } exitHandler:nil context:self];
    
    _states = states;
    
@@ -771,6 +744,4 @@ typedef void (^_ORKStateHandler)(ORKState *fromState, ORKState *_toState, id con
    }
 }

-
-
@end
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <UIKit/UIKit.h>
 #import <ResearchKit/ResearchKit.h>

+
 NS_ASSUME_NONNULL_BEGIN

 typedef NS_ENUM(NSInteger, ORKSpatialSpanTargetState) {
@@ -48,6 +50,7 @@ typedef NS_ENUM(NSInteger, ORKSpatialSpanTargetState) {

@end

+
@interface ORKSpatialSpanTargetView : UIView

@property (nonatomic, weak, nullable) id<ORKSpatialSpanTargetViewDelegate> delegate;
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKSpatialSpanTargetView.h"
 #import "ORKHelpers.h"
 #import "ORKSkin.h"
@@ -35,10 +36,10 @@
 #import "ORKAccessibility.h"
 #import "ORKDefines_Private.h"

+
 static const UIEdgeInsets _ORKFlowerMargins = (UIEdgeInsets){12,12,12,12};
 static const CGSize ORKFlowerBezierPathSize = (CGSize){90,90};
 static UIBezierPath *ORKFlowerBezierPath() {
-    
    UIBezierPath *bezierPath = UIBezierPath.bezierPath;
    [bezierPath moveToPoint: CGPointMake(58.8, 45)];
    [bezierPath addCurveToPoint: CGPointMake(51.9, 33.2) controlPoint1: CGPointMake(107.8, 41.8) controlPoint2: CGPointMake(79.3, -7.2)];
@@ -61,7 +62,6 @@ static UIBezierPath *ORKFlowerBezierPath() {

 static const CGSize ORKCheckBezierPathSize = (CGSize){28,28};
 static UIBezierPath *ORKCheckBezierPath() {
-    
    UIBezierPath *bezierPath = UIBezierPath.bezierPath;
    [bezierPath moveToPoint: CGPointMake(11.6, 19)];
    [bezierPath addCurveToPoint: CGPointMake(11.1, 18.8) controlPoint1: CGPointMake(11.4, 19) controlPoint2: CGPointMake(11.2, 18.9)];
@@ -82,7 +82,6 @@ static UIBezierPath *ORKCheckBezierPath() {

 static const CGSize ORKErrorBezierPathSize = (CGSize){28,28};
 static UIBezierPath *ORKErrorBezierPath() {
-    
    UIBezierPath *bezier3Path = UIBezierPath.bezierPath;
    [bezier3Path moveToPoint: CGPointMake(15.1, 14)];
    [bezier3Path addLineToPoint: CGPointMake(18.8, 10.3)];
@@ -114,17 +113,17 @@ static UIBezierPath *ORKErrorBezierPath() {

@property (nonatomic, readonly) UIEdgeInsets canvasMargins;
@property (nonatomic, readonly) CGSize canvasSize;
-@property (nonatomic, readonly, strong) UIBezierPath *path;
-@property (nonatomic, readonly, strong) UIColor *color;
+@property (nonatomic, strong, readonly) UIBezierPath *path;
+@property (nonatomic, strong, readonly) UIColor *color;

@end

+
@implementation ORKPathView

- (instancetype)initWithBezierPath:(UIBezierPath *)path canvasSize:(CGSize)canvasSize canvasMargins:(UIEdgeInsets)margins color:(UIColor *)color
-{
-    CGRect r = (CGRect){CGPointZero, canvasSize};
-    CGRect outsetRect = UIEdgeInsetsInsetRect(r, (UIEdgeInsets){.top=-margins.top,.left=-margins.left,.right=-margins.right,.bottom=-margins.bottom});
+- (instancetype)initWithBezierPath:(UIBezierPath *)path canvasSize:(CGSize)canvasSize canvasMargins:(UIEdgeInsets)margins color:(UIColor *)color {
+    CGRect canvasRect = (CGRect){CGPointZero, canvasSize};
+    CGRect outsetRect = UIEdgeInsetsInsetRect(canvasRect, (UIEdgeInsets){.top=-margins.top, .left=-margins.left, .right=-margins.right, .bottom=-margins.bottom});
    self = [super initWithFrame:outsetRect];
    if (self) {
        _canvasMargins = margins;
@@ -145,16 +144,16 @@ static UIBezierPath *ORKErrorBezierPath() {
 }

 - (void)drawRect:(CGRect)rect {
-    CGRect bds = [self bounds];
+    CGRect bounds = [self bounds];
    
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    [[UIColor clearColor] setFill];
-    CGContextFillRect(ctx, bds);
+    CGContextFillRect(ctx, bounds);
    
    CGFloat baseWidth = _canvasSize.width + _canvasMargins.left + _canvasMargins.right;
    CGFloat baseHeight = _canvasSize.height + _canvasMargins.top + _canvasMargins.bottom;
    
-    CGFloat aspectRatio = MIN( bds.size.width / baseWidth, bds.size.height / baseHeight);
+    CGFloat aspectRatio = MIN( bounds.size.width / baseWidth, bounds.size.height / baseHeight);
    
    CGContextSaveGState(ctx);
    
@@ -165,14 +164,12 @@ static UIBezierPath *ORKErrorBezierPath() {
    [_path fill];
    
    CGContextRestoreGState(ctx);
-    
 }

 - (void)tintColorDidChange {
    [self setNeedsDisplay];
 }

-
@end


@@ -245,7 +242,6 @@ static UIBezierPath *ORKErrorBezierPath() {
 }

 - (void)setState:(ORKSpatialSpanTargetState)state {
-    
    [self setState:state animated:NO];
 }

@@ -278,12 +274,14 @@ static UIBezierPath *ORKErrorBezierPath() {
            newCircleAlpha = 0.0;
            newCircleTransform = CGAffineTransformMakeScale(0.2, 0.2);
            break;
+            
        case ORKSpatialSpanTargetStateActive:
            _flowerView.tintColor = [self tintColor];
            newAlpha = 1.0;
            newCircleTransform = CGAffineTransformMakeScale(0.2, 0.2);
            newCircleAlpha = 0.0;
            break;
+            
        case ORKSpatialSpanTargetStateIncorrect:
            _flowerView.tintColor = [UIColor ork_redColor];
            newTransform = CGAffineTransformMakeScale(0.9*_flowerScaleFactor, 0.9*_flowerScaleFactor);
@@ -295,6 +293,7 @@ static UIBezierPath *ORKErrorBezierPath() {
            errorHidden = NO;
            useSpring = NO;
            break;
+            
        case ORKSpatialSpanTargetStateCorrect:
            _flowerView.tintColor = [self tintColor];
            newTransform = CGAffineTransformMakeScale(1.1*_flowerScaleFactor, 1.1*_flowerScaleFactor);
@@ -318,7 +317,6 @@ static UIBezierPath *ORKErrorBezierPath() {
    _checkView.hidden = checkHidden;
    _flowerView.transform = CGAffineTransformMakeScale(_flowerScaleFactor, _flowerScaleFactor);
    
-    
    [UIView animateWithDuration:(animated?duration:0) delay:0 usingSpringWithDamping:useSpring?0.5:1 initialSpringVelocity:0 options:(UIViewAnimationOptions)UIViewAnimationOptionBeginFromCurrentState animations:^{
        _errorView.alpha = newCircleAlpha;
        _checkView.alpha = newCircleAlpha;
@@ -326,19 +324,18 @@ static UIBezierPath *ORKErrorBezierPath() {
        _checkView.transform = newCircleTransform;
        self.alpha = newAlpha;
        _flowerView.transform = newTransform;
-        
    } completion:NULL];
 }

 - (void)layoutSubviews {
    [super layoutSubviews];
-    CGRect bds = self.bounds;
-    _flowerView.center = (CGPoint){CGRectGetMidX(bds), CGRectGetMidY(bds)};
-    _flowerView.bounds = bds;
+    CGRect bounds = self.bounds;
+    _flowerView.center = (CGPoint){CGRectGetMidX(bounds), CGRectGetMidY(bounds)};
+    _flowerView.bounds = bounds;
    _flowerView.transform = CGAffineTransformMakeScale(_flowerScaleFactor, _flowerScaleFactor);
    
    CGFloat designWidth = ORKFlowerBezierPathSize.width + _ORKFlowerMargins.left + _ORKFlowerMargins.right;
-    CGFloat scaleFactor = bds.size.width / designWidth;
+    CGFloat scaleFactor = bounds.size.width / designWidth;
    CGAffineTransform tfm = CGAffineTransformMakeScale(scaleFactor, scaleFactor);
    
    CGRect checkRect = CGRectApplyAffineTransform((CGRect){CGPointZero,ORKCheckBezierPathSize}, tfm);
@@ -28,9 +28,11 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKCustomStepView_Internal.h"
 #import "ORKRoundTappingButton.h"

+
 NS_ASSUME_NONNULL_BEGIN

@interface ORKTappingContentView : ORKActiveStepCustomView
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKTappingContentView.h"
 #import "ORKActiveStepTimer.h"
 #import "ORKResult.h"
@@ -36,6 +37,10 @@
 #import "ORKTapCountLabel.h"
 #import "ORKHelpers.h"

+
+// #define LAYOUT_DEBUG 1
+
+
@interface ORKTappingContentView ()

@property (nonatomic, strong) ORKSubheadlineLabel *tapCaptionLabel;
@@ -44,6 +49,7 @@

@end

+
@implementation ORKTappingContentView {
   
    NSArray *_constraints;
@@ -54,7 +60,6 @@
 - (instancetype)init {
    self = [super init];
    if (self) {
-        
        _screenType = ORKScreenTypeiPhone4;
        _tapCaptionLabel = [ORKSubheadlineLabel new];
        _tapCaptionLabel.textAlignment = NSTextAlignmentCenter;
@@ -94,6 +99,13 @@
        [self setNeedsUpdateConstraints];
        
        _tapCountLabel.accessibilityTraits |= UIAccessibilityTraitUpdatesFrequently;
+        
+#if LAYOUT_DEBUG
+        self.backgroundColor = [[UIColor yellowColor] colorWithAlphaComponent:0.5];
+        self.tapCaptionLabel.backgroundColor = [UIColor orangeColor];
+        self.tapCountLabel.backgroundColor = [UIColor greenColor];
+        _buttonContainer.backgroundColor = [[UIColor blueColor] colorWithAlphaComponent:0.25];
+#endif
    }
     return self;
 }
@@ -142,12 +154,23 @@
    ORKScreenType screenType = _screenType;
    const CGFloat HeaderBaselineToCaptionTop = ORKGetMetricForScreenType(ORKScreenMetricCaptionBaselineToTappingLabelTop, screenType);
    const CGFloat AssumedHeaderBaselineToStepViewTop = ORKGetMetricForScreenType(ORKScreenMetricLearnMoreBaselineToStepViewTop, screenType);
-    CGFloat margin = ORKStandardMarginForView(self);
+    CGFloat margin = ORKStandardHorizMarginForView(self);
    self.layoutMargins = (UIEdgeInsets) { .left=margin*2, .right=margin*2 };
    
    static const CGFloat CaptionBaselineToTapCountBaseline = 56;
    static const CGFloat TapButtonBottomToBottom = 36;
    
+    // On the iPhone, _progressView is positioned outside the bounds of this view, to be in-between the header and this view.
+    // On the iPad, we want to stretch this out a bit so it feels less compressed.
+    CGFloat progressViewOffset, topCaptionLabelOffset;
+    if (screenType == ORKScreenTypeiPad) {
+        progressViewOffset = 0;
+        topCaptionLabelOffset = AssumedHeaderBaselineToStepViewTop;
+    } else {
+        progressViewOffset = (HeaderBaselineToCaptionTop/3) - AssumedHeaderBaselineToStepViewTop;
+        topCaptionLabelOffset = HeaderBaselineToCaptionTop - AssumedHeaderBaselineToStepViewTop;
+    }
+    
    NSMutableArray *constraints = [NSMutableArray array];
    
    NSDictionary *views = NSDictionaryOfVariableBindings(_buttonContainer, _tapCaptionLabel, _tapCountLabel, _progressView, _tapButton1, _tapButton2);
@@ -156,14 +179,14 @@
                                                        relatedBy:NSLayoutRelationEqual
                                                           toItem:self
                                                        attribute:NSLayoutAttributeTop
-                                                       multiplier:1 constant:(HeaderBaselineToCaptionTop/3) - AssumedHeaderBaselineToStepViewTop]];
+                                                       multiplier:1 constant:progressViewOffset]];
    
    [constraints addObject:[NSLayoutConstraint constraintWithItem:_tapCaptionLabel
                                                        attribute:NSLayoutAttributeTop
                                                        relatedBy:NSLayoutRelationEqual
                                                           toItem:self
                                                        attribute:NSLayoutAttributeTop
-                                                       multiplier:1 constant:(HeaderBaselineToCaptionTop - AssumedHeaderBaselineToStepViewTop)]];
+                                                       multiplier:1 constant:topCaptionLabelOffset]];
    
    [constraints addObject:[NSLayoutConstraint constraintWithItem:_tapCountLabel
                                                        attribute:NSLayoutAttributeFirstBaseline
@@ -232,7 +255,6 @@
                                                       multiplier:1 constant:0]];

    
-    
    _constraints = constraints;
    [self addConstraints:_constraints];
    
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit_Private.h>

+
 NS_ASSUME_NONNULL_BEGIN

 ORK_CLASS_AVAILABLE
@@ -37,4 +39,4 @@ ORK_CLASS_AVAILABLE

@end

-NS_ASSUME_NONNULL_END
+NS_ASSUME_NONNULL_END
@@ -28,17 +28,26 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKTappingIntervalStep.h"
 #import "ORKTappingIntervalStepViewController.h"

+
@implementation ORKTappingIntervalStep

 + (Class)stepViewControllerClass {
    return [ORKTappingIntervalStepViewController class];
 }

+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    self = [super initWithIdentifier:identifier];
+    if (self) {
+        self.shouldShowDefaultTimer = NO;
+    }
+    return self;
+}
+
 - (void)validateParameters {
-    
    [super validateParameters];
    
    NSTimeInterval const ORKTwoFingerTappingMinimumDuration = 5.0;
@@ -46,9 +55,6 @@
    if ( self.stepDuration < ORKTwoFingerTappingMinimumDuration) {
        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"duration can not be shorter than %@ seconds.", @(ORKTwoFingerTappingMinimumDuration)]  userInfo:nil];
    }
-
 }

-
-
@end
@@ -28,8 +28,10 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import <ResearchKit/ResearchKit_Private.h>

+
 NS_ASSUME_NONNULL_BEGIN

 ORK_CLASS_AVAILABLE
@@ -37,4 +39,4 @@ ORK_CLASS_AVAILABLE

@end

-NS_ASSUME_NONNULL_END
+NS_ASSUME_NONNULL_END
@@ -28,6 +28,7 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

+
 #import "ORKTappingIntervalStepViewController.h"
 #import "ORKTappingContentView.h"
 #import "ORKActiveStepViewController_internal.h"
@@ -38,14 +39,15 @@
 #import "ORKHelpers.h"
 #import "ORKActiveStepView.h"

+
@interface ORKTappingIntervalStepViewController () <UIGestureRecognizerDelegate>

@property (nonatomic, strong) NSMutableArray *samples;

@end

+
@implementation ORKTappingIntervalStepViewController {
-    
    ORKTappingContentView *_tappingContentView;
    NSTimeInterval _tappingStart;
    BOOL _expired;
@@ -59,9 +61,7 @@
    UIGestureRecognizer *_touchDownRecognizer;
 }

-
 - (instancetype)initWithStep:(ORKStep *)step {
-    
    self = [super initWithStep:step];
    if (self) {
        self.suspendIfInactive = YES;
@@ -69,8 +69,7 @@
    return self;
 }

- (void)initializeInternalButtonItems
-{
+- (void)initializeInternalButtonItems {
    [super initializeInternalButtonItems];
    
    // Don't show next button
@@ -98,10 +97,8 @@
    
    [_tappingContentView.tapButton1 addTarget:self action:@selector(buttonPressed:forEvent:) forControlEvents:UIControlEventTouchDown];
    [_tappingContentView.tapButton2 addTarget:self action:@selector(buttonPressed:forEvent:) forControlEvents:UIControlEventTouchDown];
-        
 }

-
 - (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    
@@ -111,7 +108,6 @@
 }

 - (ORKStepResult *)result {
-    
    ORKStepResult *sResult = [super result];
    
    // "Now" is the end time of the result, which is either actually now,
@@ -120,7 +116,7 @@
    
    NSMutableArray *results = [NSMutableArray arrayWithArray:sResult.results];
    
-    ORKTappingIntervalResult *tappingResult = [[ORKTappingIntervalResult alloc] initWithIdentifier:(NSString *__nonnull)self.step.identifier];
+    ORKTappingIntervalResult *tappingResult = [[ORKTappingIntervalResult alloc] initWithIdentifier:self.step.identifier];
    tappingResult.startDate = sResult.startDate;
    tappingResult.endDate = now;
    tappingResult.buttonRect1 = _buttonRect1;
@@ -136,28 +132,26 @@
 }

 - (void)receiveTouch:(UITouch *)touch onButton:(ORKTappingButtonIdentifier)buttonIdentifier {
-    
    if (_expired || self.samples == nil) {
        return;
    }
    
-    NSTimeInterval ti = CACurrentMediaTime();
+    NSTimeInterval mediaTime = CACurrentMediaTime();
    
    if (_tappingStart == 0) {
-        _tappingStart = ti;
+        _tappingStart = mediaTime;
    }
    
    
    CGPoint location = [touch locationInView:self.view];
    
    // Add new sample
-    ti = ti-_tappingStart;
-    
+    mediaTime = mediaTime-_tappingStart;
    
    ORKTappingSample *sample = [[ORKTappingSample alloc] init];
    sample.buttonIdentifier = buttonIdentifier;
    sample.location = location;
-    sample.timestamp = ti;
+    sample.timestamp = mediaTime;

    [self.samples addObject:sample];
    
@@ -176,7 +170,6 @@
    [self goForward];
 }

-
 - (void)countDownTimerFired:(ORKActiveStepTimer *)timer finished:(BOOL)finished {
    CGFloat progress = finished ? 1 : (timer.runtime / timer.duration);
    [_tappingContentView setProgress:progress animated:YES];
@@ -201,7 +194,7 @@
    
    NSInteger index = (button == _tappingContentView.tapButton1) ? ORKTappingButtonIdentifierLeft : ORKTappingButtonIdentifierRight;
    
-    [self receiveTouch:[[event touchesForView:button] anyObject] onButton:index] ;
+    [self receiveTouch:[[event touchesForView:button] anyObject] onButton:index];
 }

 #pragma mark UIGestureRecognizerDelegate
@@ -219,4 +212,3 @@
 }

@end
-
@@ -0,0 +1,46 @@
+/*
+ Copyright (c) 2015, Shazino SAS. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "ORKCustomStepView_Internal.h"
+#import "ORKRoundTappingButton.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ORKToneAudiometryContentView : ORKActiveStepCustomView
+
+- (void)setProgress:(CGFloat)progress
+            caption:(NSString *)caption
+           animated:(BOOL)animated;
+
+@property (nonatomic, strong, readonly) ORKRoundTappingButton *tapButton;
+
+@end
+
+NS_ASSUME_NONNULL_END
@@ -0,0 +1,173 @@
+/*
+ Copyright (c) 2015, Shazino SAS. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+ 
+ 1.  Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 
+ 2.  Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 
+ 3.  Neither the name of the copyright holder(s) nor the names of any contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission. No license is granted to the trademarks of
+ the copyright holders even if such marks are included in this software.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "ORKToneAudiometryContentView.h"
+#import "ORKSkin.h"
+#import "ORKUnitLabel.h"
+#import "ORKHelpers.h"
+
+@interface ORKToneAudiometryContentView ()
+
+@property (nonatomic, strong) ORKUnitLabel *captionLabel;
+@property (nonatomic, strong) UIProgressView *progressView;
+
+- (void)setupConstraints;
+
+@end
+
+
+@implementation ORKToneAudiometryContentView {
+    ORKScreenType _screenType;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+
+        _screenType = ORKGetScreenTypeForWindow(self.window);
+        _captionLabel = [ORKUnitLabel new];
+        _captionLabel.textAlignment = NSTextAlignmentCenter;
+        _captionLabel.translatesAutoresizingMaskIntoConstraints = NO;
+
+        _progressView = [UIProgressView new];
+        _progressView.translatesAutoresizingMaskIntoConstraints = NO;
+        _progressView.progressTintColor = [self tintColor];
+        [_progressView setAlpha:0];
+
+        _tapButton = [[ORKRoundTappingButton alloc] init];
+        _tapButton.translatesAutoresizingMaskIntoConstraints = NO;
+        [_tapButton setTitle:ORKLocalizedString(@"TAP_BUTTON_TITLE", nil) forState:UIControlStateNormal];
+
+        [self addSubview:_captionLabel];
+        [self addSubview:_progressView];
+        [self addSubview:_tapButton];
+
+        self.translatesAutoresizingMaskIntoConstraints = NO;
+
+        _captionLabel.text = nil;
+
+        [self setupConstraints];
+        [self setNeedsUpdateConstraints];
+    }
+
+    return self;
+}
+
+- (void)tintColorDidChange {
+    [super tintColorDidChange];
+    self.progressView.progressTintColor = [self tintColor];
+}
+
+- (void)setProgress:(CGFloat)progress
+            caption:(NSString *)caption
+           animated:(BOOL)animated {
+    self.captionLabel.text = caption;
+
+    [self.progressView setProgress:progress animated:animated];
+    [UIView animateWithDuration:animated ? 0.2 : 0 animations:^{
+        [self.progressView setAlpha:(progress == 0) ? 0 : 1];
+    }];
+}
+
+- (void)finishStep:(ORKActiveStepViewController *)viewController {
+    [super finishStep:viewController];
+    self.tapButton.enabled = NO;
+}
+
+- (void)setupConstraints {
+    ORKScreenType screenType = _screenType;
+    const CGFloat HeaderBaselineToCaptionTop = ORKGetMetricForScreenType(ORKScreenMetricCaptionBaselineToTappingLabelTop, screenType);
+    const CGFloat AssumedHeaderBaselineToStepViewTop = ORKGetMetricForScreenType(ORKScreenMetricLearnMoreBaselineToStepViewTop, screenType);
+    CGFloat margin = ORKStandardHorizMarginForView(self);
+    self.layoutMargins = (UIEdgeInsets) { .left=margin*2, .right=margin*2 };
+
+    static const CGFloat TapButtonBottomToBottom = 36;
+
+    NSMutableArray *constraints = [NSMutableArray array];
+
+    NSDictionary *views = NSDictionaryOfVariableBindings(_progressView, _captionLabel, _tapButton);
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_progressView
+                                                        attribute:NSLayoutAttributeTop
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:self
+                                                        attribute:NSLayoutAttributeTop
+                                                       multiplier:1 constant:(HeaderBaselineToCaptionTop/3) - AssumedHeaderBaselineToStepViewTop]];
+
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_captionLabel
+                                                        attribute:NSLayoutAttributeTop
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:self
+                                                        attribute:NSLayoutAttributeTop
+                                                       multiplier:1 constant:(HeaderBaselineToCaptionTop - AssumedHeaderBaselineToStepViewTop)]];
+
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:self
+                                                        attribute:NSLayoutAttributeBottom
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:_tapButton
+                                                        attribute:NSLayoutAttributeBottom
+                                                       multiplier:1 constant:TapButtonBottomToBottom]];
+
+    [constraints addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"V:[_captionLabel]-(>=10)-[_tapButton]"
+                                             options:NSLayoutFormatAlignAllCenterX
+                                             metrics:nil views:views]];
+
+    [constraints addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_progressView]-|"
+                                             options:(NSLayoutFormatOptions)0
+                                             metrics:nil views:views]];
+    NSLayoutConstraint *wideProgress = [NSLayoutConstraint constraintWithItem:_progressView
+                                                                    attribute:NSLayoutAttributeWidth
+                                                                    relatedBy:NSLayoutRelationEqual
+                                                                       toItem:nil
+                                                                    attribute:NSLayoutAttributeNotAnAttribute
+                                                                   multiplier:1
+                                                                     constant:2000];
+    wideProgress.priority = UILayoutPriorityRequired-1;
+    [constraints addObject:wideProgress];
+    
+    [constraints addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_captionLabel]-|"
+                                             options:(NSLayoutFormatOptions)0
+                                             metrics:nil views:views]];
+
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_tapButton
+                                                        attribute:NSLayoutAttributeCenterX
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:self
+                                                        attribute:NSLayoutAttributeCenterX
+                                                       multiplier:1 constant:0]];
+
+    [self addConstraints:constraints];
+
+    [NSLayoutConstraint activateConstraints:constraints];
+}
+
+@end
@@ -28,15 +28,12 @@
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

-
-#import <UIKit/UIKit.h>
 #import <ResearchKit/ResearchKit.h>

 NS_ASSUME_NONNULL_BEGIN

-@interface UIApplication (ORKFirstResponderAdditions)
-
- (nullable UIResponder *)ork_currentFirstResponder;
+ORK_CLASS_AVAILABLE
+@interface ORKToneAudiometryPracticeStep : ORKActiveStep

@end

--- a/Show More
+++ b/Show More