Release 1.2

Charts: update ORKCatalog to use new data source method (convergence)

CONTRIBUTING.md

@@ -57,7 +57,7 @@ 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.
+style to more closely match the [ResearchKit framework coding style](./docs-standalone/coding-style-guide.md).
 
 New components may need to expose new Public or Private
 headers. Public headers are for APIs that are likely to be a stable
@@ -160,21 +160,22 @@ The `master` branch is used for work in progress. On `master`:
   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
+  represent that you have the right to license the patch, including 
+  all code and content, to Apple and 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.
+  You confirm that you have added 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 or other content is copied from another source), you 
+  have included 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 Apple and the community, and agree that your 
+  file submission is licensed under the ResearchKit BSD license.
+  3.  If you aren't the author of the patch, you agree that you have 
+  the right to submit the patch, and have included 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 
+  in your response. Generally we can only take in patches that are 
+  BSD-licensed in order to maintain license compatibility within the project.

README.md

@@ -55,7 +55,7 @@ Getting Started<a name="gettingstarted"></a>
 Requirements
 ------------
 
-The primary ResearchKit framework codebase supports iOS and requires Xcode 6.3
+The primary ResearchKit framework codebase supports iOS and requires Xcode 7.0
 or newer. The ResearchKit framework has a Base SDK version of 8.0, meaning that apps
 using the ResearchKit framework can run on devices with iOS 8.0 or newer.
 
@@ -110,7 +110,7 @@ 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.
+Note: You can also import ResearchKit into your project using a [dependency manager](./docs-standalone/dependency-management.md) such as CocoaPods or Carthage.
 
 ###2. Create a Step
 

ResearchKit.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'ResearchKit'
-  s.version      = '1.1.2'
+  s.version      = '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/'

ResearchKit.xcodeproj/project.pbxproj

@@ -22,6 +22,16 @@
 /* End PBXAggregateTarget section */
 
 /* Begin PBXBuildFile section */
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@@ -30,6 +40,17 @@
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+		248604061B4C98760010C8A0 /* ORKAnswerFormatTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 248604051B4C98760010C8A0 /* ORKAnswerFormatTests.m */; };
+		24898B0D1B7186C000B0E7E7 /* ORKScaleRangeImageView.h in Headers */ = {isa = PBXBuildFile; fileRef = 24898B0B1B7186C000B0E7E7 /* ORKScaleRangeImageView.h */; };
+		24898B0E1B7186C000B0E7E7 /* ORKScaleRangeImageView.m in Sources */ = {isa = PBXBuildFile; fileRef = 24898B0C1B7186C000B0E7E7 /* ORKScaleRangeImageView.m */; };
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@@ -40,6 +61,8 @@
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+		6146D0A31B84A91E0068491D /* ORKLineGraphAccessibilityElement.h in Headers */ = {isa = PBXBuildFile; fileRef = 6146D0A11B84A91E0068491D /* ORKLineGraphAccessibilityElement.h */; };
+		6146D0A41B84A91E0068491D /* ORKLineGraphAccessibilityElement.m in Sources */ = {isa = PBXBuildFile; fileRef = 6146D0A21B84A91E0068491D /* ORKLineGraphAccessibilityElement.m */; };
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@@ -51,6 +74,13 @@
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+		861D2AE81B840991008C4CD0 /* ORKTimedWalkStep.h in Headers */ = {isa = PBXBuildFile; fileRef = 861D2AE61B840991008C4CD0 /* ORKTimedWalkStep.h */; settings = {ATTRIBUTES = (Public, ); }; };
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@@ -162,7 +192,6 @@
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 		BCFF24BD1B0798D10044EC35 /* ORKResultPredicate.m in Sources */ = {isa = PBXBuildFile; fileRef = BCFF24BC1B0798D10044EC35 /* ORKResultPredicate.m */; };
 		D42FEFB81AF7557000A124F8 /* ORKImageCaptureView.h in Headers */ = {isa = PBXBuildFile; fileRef = D42FEFB61AF7557000A124F8 /* ORKImageCaptureView.h */; };
 		D42FEFB91AF7557000A124F8 /* ORKImageCaptureView.m in Sources */ = {isa = PBXBuildFile; fileRef = D42FEFB71AF7557000A124F8 /* ORKImageCaptureView.m */; };
@@ -412,6 +467,16 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		10864C961B27146B000F4158 /* ORKPSATStep.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKPSATStep.h; sourceTree = "<group>"; };
+		10864C971B27146B000F4158 /* ORKPSATStep.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKPSATStep.m; sourceTree = "<group>"; };
+		10864C981B27146B000F4158 /* ORKPSATStepViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKPSATStepViewController.h; sourceTree = "<group>"; };
+		10864C991B27146B000F4158 /* ORKPSATStepViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKPSATStepViewController.m; sourceTree = "<group>"; };
+		10864C9A1B27146B000F4158 /* ORKPSATContentView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKPSATContentView.h; sourceTree = "<group>"; };
+		10864C9B1B27146B000F4158 /* ORKPSATContentView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKPSATContentView.m; sourceTree = "<group>"; };
+		10864C9C1B27146B000F4158 /* ORKPSATKeyboardView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKPSATKeyboardView.h; sourceTree = "<group>"; };
+		10864C9D1B27146B000F4158 /* ORKPSATKeyboardView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKPSATKeyboardView.m; sourceTree = "<group>"; };
+		10BAA2C81B5FCB4F004FE478 /* ORKProgressView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKProgressView.h; sourceTree = "<group>"; };
+		10BAA2C91B5FCB4F004FE478 /* ORKProgressView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKProgressView.m; sourceTree = "<group>"; };
 		147503AD1AEE8071004B17F3 /* ORKAudioGenerator.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKAudioGenerator.h; sourceTree = "<group>"; };
 		147503AE1AEE8071004B17F3 /* ORKAudioGenerator.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKAudioGenerator.m; sourceTree = "<group>"; };
 		147503B11AEE807C004B17F3 /* ORKToneAudiometryContentView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKToneAudiometryContentView.h; sourceTree = "<group>"; };
@@ -420,6 +485,17 @@
 		147503B41AEE807C004B17F3 /* ORKToneAudiometryStep.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKToneAudiometryStep.m; sourceTree = "<group>"; };
 		147503B51AEE807C004B17F3 /* ORKToneAudiometryStepViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKToneAudiometryStepViewController.h; sourceTree = "<group>"; };
 		147503B61AEE807C004B17F3 /* ORKToneAudiometryStepViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKToneAudiometryStepViewController.m; sourceTree = "<group>"; };
+		248604051B4C98760010C8A0 /* ORKAnswerFormatTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKAnswerFormatTests.m; sourceTree = "<group>"; };
+		24898B0B1B7186C000B0E7E7 /* ORKScaleRangeImageView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKScaleRangeImageView.h; sourceTree = "<group>"; };
+		24898B0C1B7186C000B0E7E7 /* ORKScaleRangeImageView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKScaleRangeImageView.m; sourceTree = "<group>"; };
+		250F94021B4C5A6600FA23EB /* ORKTowerOfHanoiStep.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKTowerOfHanoiStep.h; sourceTree = "<group>"; };
+		250F94031B4C5A6600FA23EB /* ORKTowerOfHanoiStep.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKTowerOfHanoiStep.m; sourceTree = "<group>"; };
+		250F94061B4C5AA400FA23EB /* ORKTowerOfHanoiStepViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKTowerOfHanoiStepViewController.h; sourceTree = "<group>"; };
+		250F94071B4C5AA400FA23EB /* ORKTowerOfHanoiStepViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKTowerOfHanoiStepViewController.m; sourceTree = "<group>"; };
+		257FCE1D1B4D14E50001EF06 /* ORKTowerOfHanoiTowerView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKTowerOfHanoiTowerView.h; sourceTree = "<group>"; };
+		257FCE1E1B4D14E50001EF06 /* ORKTowerOfHanoiTowerView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKTowerOfHanoiTowerView.m; sourceTree = "<group>"; };
+		257FCE211B4D37A80001EF06 /* ORKTowerOfHanoiTower.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKTowerOfHanoiTower.h; sourceTree = "<group>"; };
+		257FCE221B4D37A80001EF06 /* ORKTowerOfHanoiTower.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKTowerOfHanoiTower.m; sourceTree = "<group>"; };
 		25ECC0931AFBD68300F3D63B /* ORKReactionTimeStep.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKReactionTimeStep.h; sourceTree = "<group>"; };
 		25ECC0941AFBD68300F3D63B /* ORKReactionTimeStep.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKReactionTimeStep.m; sourceTree = "<group>"; };
 		25ECC0991AFBD8B300F3D63B /* ORKReactionTimeViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKReactionTimeViewController.h; sourceTree = "<group>"; };
@@ -431,6 +507,8 @@
 		2EBFE11C1AE1B32D00CB8254 /* ORKUIViewAccessibilityTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKUIViewAccessibilityTests.m; sourceTree = "<group>"; };
 		2EBFE11E1AE1B68800CB8254 /* ORKVoiceEngine_Internal.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ORKVoiceEngine_Internal.h; sourceTree = "<group>"; };
 		2EBFE11F1AE1B74100CB8254 /* ORKVoiceEngineTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKVoiceEngineTests.m; sourceTree = "<group>"; };
+		6146D0A11B84A91E0068491D /* ORKLineGraphAccessibilityElement.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKLineGraphAccessibilityElement.h; sourceTree = "<group>"; };
+		6146D0A21B84A91E0068491D /* ORKLineGraphAccessibilityElement.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKLineGraphAccessibilityElement.m; sourceTree = "<group>"; };
 		618DA0481A93D0D600E63AA8 /* ORKAccessibility.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKAccessibility.h; sourceTree = "<group>"; };
 		618DA0491A93D0D600E63AA8 /* ORKAccessibilityFunctions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKAccessibilityFunctions.h; sourceTree = "<group>"; };
 		618DA04A1A93D0D600E63AA8 /* ORKAccessibilityFunctions.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKAccessibilityFunctions.m; sourceTree = "<group>"; };
@@ -443,6 +521,12 @@
 		861D11AC1AA7951F003C98A7 /* ORKChoiceAnswerFormatHelper.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKChoiceAnswerFormatHelper.m; sourceTree = "<group>"; };
 		861D11B31AA7D073003C98A7 /* ORKTextChoiceCellGroup.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKTextChoiceCellGroup.h; sourceTree = "<group>"; };
 		861D11B41AA7D073003C98A7 /* ORKTextChoiceCellGroup.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKTextChoiceCellGroup.m; sourceTree = "<group>"; };
+		861D2AE61B840991008C4CD0 /* ORKTimedWalkStep.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKTimedWalkStep.h; path = ResearchKit/ActiveTasks/ORKTimedWalkStep.h; sourceTree = SOURCE_ROOT; };
+		861D2AE71B840991008C4CD0 /* ORKTimedWalkStep.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKTimedWalkStep.m; path = ResearchKit/ActiveTasks/ORKTimedWalkStep.m; sourceTree = SOURCE_ROOT; };
+		861D2AEA1B8409B2008C4CD0 /* ORKTimedWalkStepViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKTimedWalkStepViewController.h; path = ResearchKit/ActiveTasks/ORKTimedWalkStepViewController.h; sourceTree = SOURCE_ROOT; };
+		861D2AEB1B8409B2008C4CD0 /* ORKTimedWalkStepViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKTimedWalkStepViewController.m; path = ResearchKit/ActiveTasks/ORKTimedWalkStepViewController.m; sourceTree = SOURCE_ROOT; };
+		861D2AEE1B8409D9008C4CD0 /* ORKTimedWalkContentView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKTimedWalkContentView.h; path = ResearchKit/ActiveTasks/ORKTimedWalkContentView.h; sourceTree = SOURCE_ROOT; };
+		861D2AEF1B8409D9008C4CD0 /* ORKTimedWalkContentView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKTimedWalkContentView.m; path = ResearchKit/ActiveTasks/ORKTimedWalkContentView.m; sourceTree = SOURCE_ROOT; };
 		865EA1601AB8DF750037C68E /* ORKDateTimePicker.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKDateTimePicker.h; sourceTree = "<group>"; };
 		865EA1611AB8DF750037C68E /* ORKDateTimePicker.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; lineEnding = 0; path = ORKDateTimePicker.m; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.objc; };
 		865EA1661ABA1AA10037C68E /* ORKPicker.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ORKPicker.h; sourceTree = "<group>"; };
@@ -809,7 +893,33 @@
 		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>"; };
+		BCB6E6481B7D531C000D5B34 /* ORKPieChartView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKPieChartView.h; path = Charts/ORKPieChartView.h; sourceTree = "<group>"; };
+		BCB6E6491B7D531C000D5B34 /* ORKPieChartView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKPieChartView.m; path = Charts/ORKPieChartView.m; sourceTree = "<group>"; };
+		BCB6E64C1B7D533B000D5B34 /* ORKCenteredCollectionViewLayout.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKCenteredCollectionViewLayout.h; path = Charts/ORKCenteredCollectionViewLayout.h; sourceTree = "<group>"; };
+		BCB6E64D1B7D533B000D5B34 /* ORKCenteredCollectionViewLayout.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKCenteredCollectionViewLayout.m; path = Charts/ORKCenteredCollectionViewLayout.m; sourceTree = "<group>"; };
+		BCB6E64E1B7D533B000D5B34 /* ORKPieChartLegendCell.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKPieChartLegendCell.h; path = Charts/ORKPieChartLegendCell.h; sourceTree = "<group>"; };
+		BCB6E64F1B7D533B000D5B34 /* ORKPieChartLegendCell.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKPieChartLegendCell.m; path = Charts/ORKPieChartLegendCell.m; sourceTree = "<group>"; };
+		BCB6E6541B7D534C000D5B34 /* ORKDiscreteGraphChartView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKDiscreteGraphChartView.h; path = Charts/ORKDiscreteGraphChartView.h; sourceTree = "<group>"; };
+		BCB6E6551B7D534C000D5B34 /* ORKDiscreteGraphChartView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKDiscreteGraphChartView.m; path = Charts/ORKDiscreteGraphChartView.m; sourceTree = "<group>"; };
+		BCB6E6561B7D534C000D5B34 /* ORKGraphChartView_Internal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKGraphChartView_Internal.h; path = Charts/ORKGraphChartView_Internal.h; sourceTree = "<group>"; };
+		BCB6E6571B7D534C000D5B34 /* ORKGraphChartView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKGraphChartView.h; path = Charts/ORKGraphChartView.h; sourceTree = "<group>"; };
+		BCB6E6581B7D534C000D5B34 /* ORKGraphChartView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKGraphChartView.m; path = Charts/ORKGraphChartView.m; sourceTree = "<group>"; };
+		BCB6E6591B7D534C000D5B34 /* ORKLineGraphChartView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKLineGraphChartView.h; path = Charts/ORKLineGraphChartView.h; sourceTree = "<group>"; };
+		BCB6E65A1B7D534C000D5B34 /* ORKLineGraphChartView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKLineGraphChartView.m; path = Charts/ORKLineGraphChartView.m; sourceTree = "<group>"; };
+		BCB6E6621B7D535F000D5B34 /* ORKXAxisView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKXAxisView.h; path = Charts/ORKXAxisView.h; sourceTree = "<group>"; };
+		BCB6E6631B7D535F000D5B34 /* ORKXAxisView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKXAxisView.m; path = Charts/ORKXAxisView.m; sourceTree = "<group>"; };
+		BCB6E66A1B7D537B000D5B34 /* ORKRangedPoint.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKRangedPoint.h; path = Charts/ORKRangedPoint.h; sourceTree = "<group>"; };
+		BCB6E66B1B7D537B000D5B34 /* ORKRangedPoint.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKRangedPoint.m; path = Charts/ORKRangedPoint.m; sourceTree = "<group>"; };
 		BCB96C121B19C0EC002A0B96 /* ORKStepTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ORKStepTests.m; sourceTree = "<group>"; };
+		BCC1CD981B7ED64F00D86886 /* ORKYAxisView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKYAxisView.h; path = Charts/ORKYAxisView.h; sourceTree = "<group>"; };
+		BCC1CD991B7ED64F00D86886 /* ORKYAxisView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKYAxisView.m; path = Charts/ORKYAxisView.m; sourceTree = "<group>"; };
+		BCD192DD1B81240400FCC08A /* ORKPieChartPieView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKPieChartPieView.h; path = Charts/ORKPieChartPieView.h; sourceTree = "<group>"; };
+		BCD192DE1B81240400FCC08A /* ORKPieChartPieView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKPieChartPieView.m; path = Charts/ORKPieChartPieView.m; sourceTree = "<group>"; };
+		BCD192E51B81243900FCC08A /* ORKPieChartLegendView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKPieChartLegendView.h; path = Charts/ORKPieChartLegendView.h; sourceTree = "<group>"; };
+		BCD192E61B81243900FCC08A /* ORKPieChartLegendView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKPieChartLegendView.m; path = Charts/ORKPieChartLegendView.m; sourceTree = "<group>"; };
+		BCD192E91B81245500FCC08A /* ORKPieChartTitleTextView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKPieChartTitleTextView.h; path = Charts/ORKPieChartTitleTextView.h; sourceTree = "<group>"; };
+		BCD192EA1B81245500FCC08A /* ORKPieChartTitleTextView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = ORKPieChartTitleTextView.m; path = Charts/ORKPieChartTitleTextView.m; sourceTree = "<group>"; };
+		BCD192ED1B81255F00FCC08A /* ORKPieChartView_Internal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ORKPieChartView_Internal.h; path = Charts/ORKPieChartView_Internal.h; 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>"; };
@@ -849,6 +959,43 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		10864C951B271456000F4158 /* PSAT */ = {
+			isa = PBXGroup;
+			children = (
+				10864C961B27146B000F4158 /* ORKPSATStep.h */,
+				10864C971B27146B000F4158 /* ORKPSATStep.m */,
+				10864C981B27146B000F4158 /* ORKPSATStepViewController.h */,
+				10864C991B27146B000F4158 /* ORKPSATStepViewController.m */,
+				10864C9A1B27146B000F4158 /* ORKPSATContentView.h */,
+				10864C9B1B27146B000F4158 /* ORKPSATContentView.m */,
+				10864C9C1B27146B000F4158 /* ORKPSATKeyboardView.h */,
+				10864C9D1B27146B000F4158 /* ORKPSATKeyboardView.m */,
+			);
+			name = PSAT;
+			sourceTree = "<group>";
+		};
+		10BAA2CC1B5FCDB1004FE478 /* Walking */ = {
+			isa = PBXGroup;
+			children = (
+				B12EFF601AB2178B00A80147 /* Short Walk */,
+				10BAA2CD1B5FCDFB004FE478 /* Timed Walk */,
+			);
+			name = Walking;
+			sourceTree = "<group>";
+		};
+		10BAA2CD1B5FCDFB004FE478 /* Timed Walk */ = {
+			isa = PBXGroup;
+			children = (
+				861D2AEE1B8409D9008C4CD0 /* ORKTimedWalkContentView.h */,
+				861D2AEF1B8409D9008C4CD0 /* ORKTimedWalkContentView.m */,
+				861D2AEA1B8409B2008C4CD0 /* ORKTimedWalkStepViewController.h */,
+				861D2AEB1B8409B2008C4CD0 /* ORKTimedWalkStepViewController.m */,
+				861D2AE61B840991008C4CD0 /* ORKTimedWalkStep.h */,
+				861D2AE71B840991008C4CD0 /* ORKTimedWalkStep.m */,
+			);
+			name = "Timed Walk";
+			sourceTree = "<group>";
+		};
 		147503AC1AEE8058004B17F3 /* Tone Audiometry */ = {
 			isa = PBXGroup;
 			children = (
@@ -868,6 +1015,71 @@
 			name = "Tone Audiometry";
 			sourceTree = "<group>";
 		};
+		259E76FB1AFFAEAC0070F786 /* Charts */ = {
+			isa = PBXGroup;
+			children = (
+				25BD76671B00B37100478C5D /* Pie */,
+				25BD76601B00A5CF00478C5D /* Graphs */,
+			);
+			name = Charts;
+			sourceTree = "<group>";
+		};
+		25BD76601B00A5CF00478C5D /* Graphs */ = {
+			isa = PBXGroup;
+			children = (
+				BCB6E66A1B7D537B000D5B34 /* ORKRangedPoint.h */,
+				BCB6E66B1B7D537B000D5B34 /* ORKRangedPoint.m */,
+				BCB6E6541B7D534C000D5B34 /* ORKDiscreteGraphChartView.h */,
+				BCB6E6551B7D534C000D5B34 /* ORKDiscreteGraphChartView.m */,
+				BCB6E6561B7D534C000D5B34 /* ORKGraphChartView_Internal.h */,
+				BCB6E6571B7D534C000D5B34 /* ORKGraphChartView.h */,
+				BCB6E6581B7D534C000D5B34 /* ORKGraphChartView.m */,
+				BCB6E6591B7D534C000D5B34 /* ORKLineGraphChartView.h */,
+				BCB6E65A1B7D534C000D5B34 /* ORKLineGraphChartView.m */,
+				25BD76611B00A5E700478C5D /* Components */,
+			);
+			name = Graphs;
+			sourceTree = "<group>";
+		};
+		25BD76611B00A5E700478C5D /* Components */ = {
+			isa = PBXGroup;
+			children = (
+				BCC1CD981B7ED64F00D86886 /* ORKYAxisView.h */,
+				BCC1CD991B7ED64F00D86886 /* ORKYAxisView.m */,
+				BCB6E6621B7D535F000D5B34 /* ORKXAxisView.h */,
+				BCB6E6631B7D535F000D5B34 /* ORKXAxisView.m */,
+			);
+			name = Components;
+			sourceTree = "<group>";
+		};
+		25BD76671B00B37100478C5D /* Pie */ = {
+			isa = PBXGroup;
+			children = (
+				BCD192ED1B81255F00FCC08A /* ORKPieChartView_Internal.h */,
+				BCB6E6481B7D531C000D5B34 /* ORKPieChartView.h */,
+				BCB6E6491B7D531C000D5B34 /* ORKPieChartView.m */,
+				25C17CBB1B2058D4001ADDD2 /* Components */,
+			);
+			name = Pie;
+			sourceTree = "<group>";
+		};
+		25C17CBB1B2058D4001ADDD2 /* Components */ = {
+			isa = PBXGroup;
+			children = (
+				BCB6E64C1B7D533B000D5B34 /* ORKCenteredCollectionViewLayout.h */,
+				BCB6E64D1B7D533B000D5B34 /* ORKCenteredCollectionViewLayout.m */,
+				BCB6E64E1B7D533B000D5B34 /* ORKPieChartLegendCell.h */,
+				BCB6E64F1B7D533B000D5B34 /* ORKPieChartLegendCell.m */,
+				BCD192DD1B81240400FCC08A /* ORKPieChartPieView.h */,
+				BCD192DE1B81240400FCC08A /* ORKPieChartPieView.m */,
+				BCD192E51B81243900FCC08A /* ORKPieChartLegendView.h */,
+				BCD192E61B81243900FCC08A /* ORKPieChartLegendView.m */,
+				BCD192E91B81245500FCC08A /* ORKPieChartTitleTextView.h */,
+				BCD192EA1B81245500FCC08A /* ORKPieChartTitleTextView.m */,
+			);
+			name = Components;
+			sourceTree = "<group>";
+		};
 		25ECC0921AFBD64800F3D63B /* Reaction Time */ = {
 			isa = PBXGroup;
 			children = (
@@ -883,6 +1095,21 @@
 			name = "Reaction Time";
 			sourceTree = "<group>";
 		};
+		25F5CEDC1B4C3F1D0031E2A4 /* TowerOfHanoi */ = {
+			isa = PBXGroup;
+			children = (
+				250F94021B4C5A6600FA23EB /* ORKTowerOfHanoiStep.h */,
+				250F94031B4C5A6600FA23EB /* ORKTowerOfHanoiStep.m */,
+				250F94061B4C5AA400FA23EB /* ORKTowerOfHanoiStepViewController.h */,
+				250F94071B4C5AA400FA23EB /* ORKTowerOfHanoiStepViewController.m */,
+				257FCE1D1B4D14E50001EF06 /* ORKTowerOfHanoiTowerView.h */,
+				257FCE1E1B4D14E50001EF06 /* ORKTowerOfHanoiTowerView.m */,
+				257FCE211B4D37A80001EF06 /* ORKTowerOfHanoiTower.h */,
+				257FCE221B4D37A80001EF06 /* ORKTowerOfHanoiTower.m */,
+			);
+			name = TowerOfHanoi;
+			sourceTree = "<group>";
+		};
 		3FFF18341829DB1D00167070 = {
 			isa = PBXGroup;
 			children = (
@@ -920,6 +1147,8 @@
 				618DA04A1A93D0D600E63AA8 /* ORKAccessibilityFunctions.m */,
 				618DA04B1A93D0D600E63AA8 /* UIView+ORKAccessibility.h */,
 				618DA04C1A93D0D600E63AA8 /* UIView+ORKAccessibility.m */,
+				6146D0A11B84A91E0068491D /* ORKLineGraphAccessibilityElement.h */,
+				6146D0A21B84A91E0068491D /* ORKLineGraphAccessibilityElement.m */,
 			);
 			path = Accessibility;
 			sourceTree = "<group>";
@@ -931,6 +1160,7 @@
 				B1B894391A00345200C5CF2D /* ResearchKit_Private.h */,
 				86C40B511A8D7C5B00081FAC /* Common */,
 				86C40AF91A8D7C5B00081FAC /* ActiveTasks */,
+				259E76FB1AFFAEAC0070F786 /* Charts */,
 				86C40BEB1A8D7C5C00081FAC /* Consent */,
 				618DA0471A93D0D600E63AA8 /* Accessibility */,
 				B1A860D91A9693C400EA57B7 /* Animations */,
@@ -949,10 +1179,12 @@
 				B12EFF4E1AB2161500A80147 /* Audio */,
 				B12EFF5D1AB2177700A80147 /* Fitness */,
 				B12EFF5E1AB2177D00A80147 /* Spatial Span Memory */,
-				25ECC0921AFBD64800F3D63B /* Reaction Time */,
+				25F5CEDC1B4C3F1D0031E2A4 /* TowerOfHanoi */,
 				B12EFF5F1AB2178500A80147 /* Tapping */,
-				B12EFF601AB2178B00A80147 /* Walking */,
+				10BAA2CC1B5FCDB1004FE478 /* Walking */,
 				147503AC1AEE8058004B17F3 /* Tone Audiometry */,
+				25ECC0921AFBD64800F3D63B /* Reaction Time */,
+				10864C951B271456000F4158 /* PSAT */,
 			);
 			path = ActiveTasks;
 			sourceTree = "<group>";
@@ -992,6 +1224,7 @@
 				FA7A9D351B09362D005A2BEA /* Consent */,
 				86CC8EA71AC09383001CCD89 /* Info.plist */,
 				86CC8EA81AC09383001CCD89 /* ORKAccessibilityTests.m */,
+				248604051B4C98760010C8A0 /* ORKAnswerFormatTests.m */,
 				86CC8EA91AC09383001CCD89 /* ORKChoiceAnswerFormatHelperTests.m */,
 				86CC8EAB1AC09383001CCD89 /* ORKDataLoggerManagerTests.m */,
 				86CC8EAC1AC09383001CCD89 /* ORKDataLoggerTests.m */,
@@ -1055,6 +1288,8 @@
 				86C40B911A8D7C5C00081FAC /* ORKImageChoiceLabel.m */,
 				86C40B971A8D7C5C00081FAC /* ORKLabel.h */,
 				86C40B981A8D7C5C00081FAC /* ORKLabel.m */,
+				10BAA2C81B5FCB4F004FE478 /* ORKProgressView.h */,
+				10BAA2C91B5FCB4F004FE478 /* ORKProgressView.m */,
 				86C40BAA1A8D7C5C00081FAC /* ORKRoundTappingButton.h */,
 				86C40BAB1A8D7C5C00081FAC /* ORKRoundTappingButton.m */,
 				86C40BB01A8D7C5C00081FAC /* ORKScaleValueLabel.h */,
@@ -1063,6 +1298,8 @@
 				86C40BAD1A8D7C5C00081FAC /* ORKScaleRangeLabel.m */,
 				B8760F291AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.h */,
 				B8760F2A1AFBEFB0007FA16F /* ORKScaleRangeDescriptionLabel.m */,
+				24898B0B1B7186C000B0E7E7 /* ORKScaleRangeImageView.h */,
+				24898B0C1B7186C000B0E7E7 /* ORKScaleRangeImageView.m */,
 				86C40BC01A8D7C5C00081FAC /* ORKSubheadlineLabel.h */,
 				86C40BC11A8D7C5C00081FAC /* ORKSubheadlineLabel.m */,
 				86C40BD31A8D7C5C00081FAC /* ORKTapCountLabel.h */,
@@ -1632,7 +1869,7 @@
 			name = Tapping;
 			sourceTree = "<group>";
 		};
-		B12EFF601AB2178B00A80147 /* Walking */ = {
+		B12EFF601AB2178B00A80147 /* Short Walk */ = {
 			isa = PBXGroup;
 			children = (
 				86C40B1E1A8D7C5B00081FAC /* ORKWalkingTaskStep.h */,
@@ -1640,7 +1877,7 @@
 				86C40B201A8D7C5B00081FAC /* ORKWalkingTaskStepViewController.h */,
 				86C40B211A8D7C5B00081FAC /* ORKWalkingTaskStepViewController.m */,
 			);
-			name = Walking;
+			name = "Short Walk";
 			sourceTree = "<group>";
 		};
 		B12EFF611AB217AE00A80147 /* Speech Synthesis */ = {
@@ -1754,6 +1991,7 @@
 				BCA5C0351AEC05F20092AC8D /* ORKStepNavigationRule.h in Headers */,
 				BC13CE391B0660220044153C /* ORKNavigableOrderedTask.h in Headers */,
 				86C40C921A8D7C5C00081FAC /* ORKAudioRecorder.h in Headers */,
+				BCB6E65B1B7D534C000D5B34 /* ORKDiscreteGraphChartView.h in Headers */,
 				86C40D8E1A8D7C5C00081FAC /* ORKStep.h in Headers */,
 				618DA04E1A93D0D600E63AA8 /* ORKAccessibility.h in Headers */,
 				86B781BB1AA668ED00688151 /* ORKTimeIntervalPicker.h in Headers */,
@@ -1761,6 +1999,7 @@
 				86C40CE41A8D7C5C00081FAC /* ORKAnswerFormat.h in Headers */,
 				25ECC0951AFBD68300F3D63B /* ORKReactionTimeStep.h in Headers */,
 				86C40D0A1A8D7C5C00081FAC /* ORKCustomStepView.h in Headers */,
+				BCD192EE1B81255F00FCC08A /* ORKPieChartView_Internal.h in Headers */,
 				86C40DCE1A8D7C5C00081FAC /* ORKTaskViewController_Internal.h in Headers */,
 				25ECC09F1AFBD92D00F3D63B /* ORKReactionTimeContentView.h in Headers */,
 				86C40C361A8D7C5C00081FAC /* ORKSpatialSpanGame.h in Headers */,
@@ -1771,11 +2010,13 @@
 				86C40C961A8D7C5C00081FAC /* ORKDataLogger.h in Headers */,
 				BC13CE421B066A990044153C /* ORKStepNavigationRule_Internal.h in Headers */,
 				86C40D781A8D7C5C00081FAC /* ORKScaleSlider.h in Headers */,
+				861D2AE81B840991008C4CD0 /* ORKTimedWalkStep.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 */,
+				BCD192DF1B81240400FCC08A /* ORKPieChartPieView.h in Headers */,
 				86C40D441A8D7C5C00081FAC /* ORKInstructionStepViewController.h in Headers */,
 				86C40D841A8D7C5C00081FAC /* ORKSelectionTitleLabel.h in Headers */,
 				BC13CE3C1B0662990044153C /* ORKStepNavigationRule_Private.h in Headers */,
@@ -1784,6 +2025,7 @@
 				86C40C661A8D7C5C00081FAC /* CMAccelerometerData+ORKJSONDictionary.h in Headers */,
 				25ECC0A31AFBDD2700F3D63B /* ORKReactionTimeStimulusView.h in Headers */,
 				86C40D701A8D7C5C00081FAC /* ORKRoundTappingButton.h in Headers */,
+				BCB6E6501B7D533B000D5B34 /* ORKCenteredCollectionViewLayout.h in Headers */,
 				865EA1621AB8DF750037C68E /* ORKDateTimePicker.h in Headers */,
 				86C40DA01A8D7C5C00081FAC /* ORKSurveyAnswerCell.h in Headers */,
 				86C40D941A8D7C5C00081FAC /* ORKStepViewController.h in Headers */,
@@ -1791,13 +2033,16 @@
 				86C40C221A8D7C5C00081FAC /* ORKCountdownStep.h in Headers */,
 				86C40DB61A8D7C5C00081FAC /* ORKSurveyAnswerCellForText.h in Headers */,
 				86C40E281A8D7C5C00081FAC /* ORKSignatureView.h in Headers */,
+				BCB6E65D1B7D534C000D5B34 /* ORKGraphChartView_Internal.h in Headers */,
 				86C40C8C1A8D7C5C00081FAC /* ORKActiveStepViewController.h in Headers */,
 				618DA0541A93D0D600E63AA8 /* UIView+ORKAccessibility.h in Headers */,
 				86C40C3A1A8D7C5C00081FAC /* ORKSpatialSpanGameState.h in Headers */,
+				10864CA21B27146B000F4158 /* ORKPSATContentView.h in Headers */,
 				618DA0501A93D0D600E63AA8 /* ORKAccessibilityFunctions.h in Headers */,
 				86C40C721A8D7C5C00081FAC /* CMPedometerData+ORKJSONDictionary.h in Headers */,
 				86C40CA41A8D7C5C00081FAC /* ORKLocationRecorder.h in Headers */,
 				86C40D201A8D7C5C00081FAC /* ORKFormStep.h in Headers */,
+				BCD192EB1B81245500FCC08A /* ORKPieChartTitleTextView.h in Headers */,
 				86C40C761A8D7C5C00081FAC /* HKSample+ORKJSONDictionary.h in Headers */,
 				86C40CEA1A8D7C5C00081FAC /* ORKAnswerTextField.h in Headers */,
 				B12EA0191B0D76AD00F9F554 /* ORKToneAudiometryPracticeStepViewController.h in Headers */,
@@ -1805,6 +2050,7 @@
 				86C40CE81A8D7C5C00081FAC /* ORKAnswerFormat_Internal.h in Headers */,
 				86C40D021A8D7C5C00081FAC /* ORKContinueButton.h in Headers */,
 				86C40D681A8D7C5C00081FAC /* ORKQuestionStepViewController_Private.h in Headers */,
+				BCB6E6661B7D535F000D5B34 /* ORKXAxisView.h in Headers */,
 				86C40D121A8D7C5C00081FAC /* ORKDefines.h in Headers */,
 				86C40D401A8D7C5C00081FAC /* ORKInstructionStep.h in Headers */,
 				147503B71AEE807C004B17F3 /* ORKToneAudiometryContentView.h in Headers */,
@@ -1813,6 +2059,7 @@
 				D42FEFB81AF7557000A124F8 /* ORKImageCaptureView.h in Headers */,
 				86C40D1A1A8D7C5C00081FAC /* ORKFormItem_Internal.h in Headers */,
 				86C40E1C1A8D7C5C00081FAC /* ORKConsentSection_Internal.h in Headers */,
+				861D2AEC1B8409B2008C4CD0 /* ORKTimedWalkStepViewController.h in Headers */,
 				86C40C7A1A8D7C5C00081FAC /* ORKAccelerometerRecorder.h in Headers */,
 				86C40D141A8D7C5C00081FAC /* ORKDefines_Private.h in Headers */,
 				86C40CA81A8D7C5C00081FAC /* ORKPedometerRecorder.h in Headers */,
@@ -1826,12 +2073,15 @@
 				B11C549F1A9EF4A700265E61 /* ORKConsentSharingStepViewController.h in Headers */,
 				86C40D621A8D7C5C00081FAC /* ORKQuestionStep_Internal.h in Headers */,
 				86C40D641A8D7C5C00081FAC /* ORKQuestionStepViewController.h in Headers */,
+				10BAA2CA1B5FCB4F004FE478 /* ORKProgressView.h in Headers */,
+				BCB6E6601B7D534C000D5B34 /* ORKLineGraphChartView.h in Headers */,
 				86C40E241A8D7C5C00081FAC /* ORKEAGLMoviePlayerView.h in Headers */,
 				B183A4DD1A8535D100C76870 /* ResearchKit.h in Headers */,
 				86C40D101A8D7C5C00081FAC /* ORKDefaultFont.h in Headers */,
 				86C40E301A8D7C5C00081FAC /* ORKVisualConsentStepViewController.h in Headers */,
 				86C40DCA1A8D7C5C00081FAC /* ORKTaskViewController.h in Headers */,
 				86C40C7E1A8D7C5C00081FAC /* ORKActiveStep.h in Headers */,
+				BCB6E65E1B7D534C000D5B34 /* ORKGraphChartView.h in Headers */,
 				86C40DD21A8D7C5C00081FAC /* ORKTextButton.h in Headers */,
 				86C40CD41A8D7C5C00081FAC /* ORKTableContainerView.h in Headers */,
 				86C40D0E1A8D7C5C00081FAC /* ORKCustomStepView_Internal.h in Headers */,
@@ -1839,8 +2089,11 @@
 				86C40D921A8D7C5C00081FAC /* ORKStep_Private.h in Headers */,
 				86C40CC41A8D7C5C00081FAC /* ORKCompletionStepViewController.h in Headers */,
 				86C40D7C1A8D7C5C00081FAC /* ORKScaleValueLabel.h in Headers */,
+				250F94081B4C5AA400FA23EB /* ORKTowerOfHanoiStepViewController.h in Headers */,
 				86C40E2C1A8D7C5C00081FAC /* ORKVisualConsentStep.h in Headers */,
+				257FCE1F1B4D14E50001EF06 /* ORKTowerOfHanoiTowerView.h in Headers */,
 				86C40CB81A8D7C5C00081FAC /* ORKVoiceEngine.h in Headers */,
+				BCB6E6521B7D533B000D5B34 /* ORKPieChartLegendCell.h in Headers */,
 				FA7A9D331B0843A9005A2BEA /* ORKConsentSignatureFormatter.h in Headers */,
 				86C40C5A1A8D7C5C00081FAC /* ORKWalkingTaskStep.h in Headers */,
 				86C40E361A8D7C5C00081FAC /* ORKVisualConsentTransitionAnimator.h in Headers */,
@@ -1852,6 +2105,7 @@
 				B11C54991A9EEF8800265E61 /* ORKConsentSharingStep.h in Headers */,
 				86C40DA61A8D7C5C00081FAC /* ORKSurveyAnswerCellForImageSelection.h in Headers */,
 				86C40D5E1A8D7C5C00081FAC /* ORKQuestionStep.h in Headers */,
+				6146D0A31B84A91E0068491D /* ORKLineGraphAccessibilityElement.h in Headers */,
 				86C40C841A8D7C5C00081FAC /* ORKActiveStepTimer.h in Headers */,
 				86B781BD1AA668ED00688151 /* ORKValuePicker.h in Headers */,
 				86C40DE21A8D7C5C00081FAC /* ORKVerticalContainerView_Internal.h in Headers */,
@@ -1865,15 +2119,19 @@
 				D458520A1AF6CCFA00A2DE13 /* ORKImageCaptureCameraPreviewView.h in Headers */,
 				D44239791AF17F5100559D96 /* ORKImageCaptureStep.h in Headers */,
 				86C40CB21A8D7C5C00081FAC /* ORKRecorder_Private.h in Headers */,
+				BCD192E71B81243900FCC08A /* ORKPieChartLegendView.h in Headers */,
 				86C40C881A8D7C5C00081FAC /* ORKActiveStepTimerView.h in Headers */,
 				86C40C161A8D7C5C00081FAC /* ORKAudioContentView.h in Headers */,
 				86C40CB41A8D7C5C00081FAC /* ORKTouchRecorder.h in Headers */,
 				86C40DEA1A8D7C5C00081FAC /* UIBarButtonItem+ORKBarButtonItem.h in Headers */,
 				86C40CF61A8D7C5C00081FAC /* ORKBorderedButton.h in Headers */,
 				86C40D4A1A8D7C5C00081FAC /* ORKLabel.h in Headers */,
+				250F94041B4C5A6600FA23EB /* ORKTowerOfHanoiStep.h in Headers */,
 				861D11A91AA691BB003C98A7 /* ORKScaleSliderView.h in Headers */,
+				10864CA01B27146B000F4158 /* ORKPSATStepViewController.h in Headers */,
 				BC13CE3E1B0662A80044153C /* ORKOrderedTask_Internal.h in Headers */,
 				86C40C3E1A8D7C5C00081FAC /* ORKSpatialSpanMemoryContentView.h in Headers */,
+				257FCE231B4D37A80001EF06 /* ORKTowerOfHanoiTower.h in Headers */,
 				86C40CC01A8D7C5C00081FAC /* ORKCompletionStep.h in Headers */,
 				86C40DF61A8D7C5C00081FAC /* ORKConsentSignatureController.h in Headers */,
 				86C40CDC1A8D7C5C00081FAC /* ORKTintedImageView.h in Headers */,
@@ -1886,9 +2144,12 @@
 				86C40DC21A8D7C5C00081FAC /* ORKTapCountLabel.h in Headers */,
 				86C40D301A8D7C5C00081FAC /* ORKHealthAnswerFormat.h in Headers */,
 				86C40C261A8D7C5C00081FAC /* ORKCountdownStepViewController.h in Headers */,
+				861D2AF01B8409D9008C4CD0 /* ORKTimedWalkContentView.h in Headers */,
 				86C40E0C1A8D7C5C00081FAC /* ORKConsentReviewStepViewController.h in Headers */,
 				86C40C321A8D7C5C00081FAC /* ORKFitnessStepViewController.h in Headers */,
+				BCC1CD9A1B7ED64F00D86886 /* ORKYAxisView.h in Headers */,
 				86C40DBE1A8D7C5C00081FAC /* ORKTableViewCell.h in Headers */,
+				BCB6E64A1B7D531C000D5B34 /* ORKPieChartView.h in Headers */,
 				86C40C2E1A8D7C5C00081FAC /* ORKFitnessStep.h in Headers */,
 				86C40C821A8D7C5C00081FAC /* ORKActiveStep_Internal.h in Headers */,
 				86C40D481A8D7C5C00081FAC /* ORKInstructionStepViewController_Internal.h in Headers */,
@@ -1906,13 +2167,16 @@
 				86C40CD81A8D7C5C00081FAC /* ORKTextFieldView.h in Headers */,
 				86C40DD01A8D7C5C00081FAC /* ORKTaskViewController_Private.h in Headers */,
 				86C40DAE1A8D7C5C00081FAC /* ORKSurveyAnswerCellForScale.h in Headers */,
+				10864CA41B27146B000F4158 /* ORKPSATKeyboardView.h in Headers */,
 				86C40CFE1A8D7C5C00081FAC /* ORKChoiceViewCell.h in Headers */,
 				86C40DC61A8D7C5C00081FAC /* ORKTask.h in Headers */,
 				86C40C561A8D7C5C00081FAC /* ORKTappingIntervalStepViewController.h in Headers */,
 				86AD91101AB7B8A600361FEB /* ORKActiveStepView.h in Headers */,
 				86C40C9C1A8D7C5C00081FAC /* ORKDeviceMotionRecorder.h in Headers */,
 				86C40E1E1A8D7C5C00081FAC /* ORKConsentSignature.h in Headers */,
+				24898B0D1B7186C000B0E7E7 /* ORKScaleRangeImageView.h in Headers */,
 				86C40C5E1A8D7C5C00081FAC /* ORKWalkingTaskStepViewController.h in Headers */,
+				BCB6E66C1B7D537B000D5B34 /* ORKRangedPoint.h in Headers */,
 				86C40D2C1A8D7C5C00081FAC /* ORKHeadlineLabel.h in Headers */,
 				86C40D1C1A8D7C5C00081FAC /* ORKFormSectionTitleLabel.h in Headers */,
 				86C40CBC1A8D7C5C00081FAC /* UITouch+ORKJSONDictionary.h in Headers */,
@@ -1921,6 +2185,7 @@
 				86C40CB01A8D7C5C00081FAC /* ORKRecorder_Internal.h in Headers */,
 				86C40E101A8D7C5C00081FAC /* ORKConsentSceneViewController.h in Headers */,
 				86C40DAA1A8D7C5C00081FAC /* ORKSurveyAnswerCellForNumber.h in Headers */,
+				10864C9E1B27146B000F4158 /* ORKPSATStep.h in Headers */,
 				86C40D6E1A8D7C5C00081FAC /* ORKResult_Private.h in Headers */,
 				86C40D161A8D7C5C00081FAC /* ORKErrors.h in Headers */,
 				861D11B51AA7D073003C98A7 /* ORKTextChoiceCellGroup.h in Headers */,
@@ -1984,7 +2249,7 @@
 			isa = PBXProject;
 			attributes = {
 				CLASSPREFIX = ORK;
-				LastUpgradeCheck = 0700;
+				LastUpgradeCheck = 0640;
 				ORGANIZATIONNAME = researchkit.org;
 				TargetAttributes = {
 					86CC8E991AC09332001CCD89 = {
@@ -2133,6 +2398,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				86CC8EB71AC09383001CCD89 /* ORKDataLoggerTests.m in Sources */,
+				248604061B4C98760010C8A0 /* ORKAnswerFormatTests.m in Sources */,
 				86CC8EBA1AC09383001CCD89 /* ORKResultTests.m in Sources */,
 				FA7A9D391B0969A7005A2BEA /* ORKConsentSignatureFormatterTests.m in Sources */,
 				86CC8EB81AC09383001CCD89 /* ORKHKSampleTests.m in Sources */,
@@ -2155,20 +2421,24 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				861D2AED1B8409B2008C4CD0 /* ORKTimedWalkStepViewController.m in Sources */,
 				86C40C341A8D7C5C00081FAC /* ORKFitnessStepViewController.m in Sources */,
 				86C40E2E1A8D7C5C00081FAC /* ORKVisualConsentStep.m in Sources */,
 				86C40CA61A8D7C5C00081FAC /* ORKLocationRecorder.m in Sources */,
 				86C40CB61A8D7C5C00081FAC /* ORKTouchRecorder.m in Sources */,
 				B12EA0161B0D73A500F9F554 /* ORKToneAudiometryPracticeStep.m in Sources */,
+				861D2AF11B8409D9008C4CD0 /* ORKTimedWalkContentView.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 */,
 				86C40DF81A8D7C5C00081FAC /* ORKConsentSignatureController.m in Sources */,
+				BCB6E6531B7D533B000D5B34 /* ORKPieChartLegendCell.m in Sources */,
 				86C40D8C1A8D7C5C00081FAC /* ORKSkin.m in Sources */,
 				86C40D221A8D7C5C00081FAC /* ORKFormStep.m in Sources */,
 				86C40CD61A8D7C5C00081FAC /* ORKTableContainerView.m in Sources */,
+				257FCE201B4D14E50001EF06 /* ORKTowerOfHanoiTowerView.m in Sources */,
 				861D11AE1AA7951F003C98A7 /* ORKChoiceAnswerFormatHelper.m in Sources */,
 				86C40C381A8D7C5C00081FAC /* ORKSpatialSpanGame.m in Sources */,
 				86C40C481A8D7C5C00081FAC /* ORKSpatialSpanMemoryStepViewController.m in Sources */,
@@ -2192,23 +2462,32 @@
 				86C40DB81A8D7C5C00081FAC /* ORKSurveyAnswerCellForText.m in Sources */,
 				86C40CF01A8D7C5C00081FAC /* ORKAnswerTextView.m in Sources */,
 				86C40D3E1A8D7C5C00081FAC /* ORKImageChoiceLabel.m in Sources */,
+				250F94051B4C5A6600FA23EB /* ORKTowerOfHanoiStep.m in Sources */,
 				86C40E0A1A8D7C5C00081FAC /* ORKConsentReviewStep.m in Sources */,
+				BCD192E81B81243900FCC08A /* ORKPieChartLegendView.m in Sources */,
 				86C40D1E1A8D7C5C00081FAC /* ORKFormSectionTitleLabel.m in Sources */,
+				250F94091B4C5AA400FA23EB /* ORKTowerOfHanoiStepViewController.m in Sources */,
 				86C40CF81A8D7C5C00081FAC /* ORKBorderedButton.m in Sources */,
 				86C40E201A8D7C5C00081FAC /* ORKConsentSignature.m in Sources */,
 				86C40C601A8D7C5C00081FAC /* ORKWalkingTaskStepViewController.m in Sources */,
+				BCD192E01B81240400FCC08A /* ORKPieChartPieView.m in Sources */,
 				866F86011A96CBF3007B282C /* ORKSurveyAnswerCell.m in Sources */,
 				86C40E321A8D7C5C00081FAC /* ORKVisualConsentStepViewController.m in Sources */,
 				618DA0561A93D0D600E63AA8 /* UIView+ORKAccessibility.m in Sources */,
 				86C40D3A1A8D7C5C00081FAC /* ORKHTMLPDFWriter.m in Sources */,
 				865EA1691ABA1AA10037C68E /* ORKPicker.m in Sources */,
+				BCB6E6511B7D533B000D5B34 /* ORKCenteredCollectionViewLayout.m in Sources */,
 				86C40D321A8D7C5C00081FAC /* ORKHealthAnswerFormat.m in Sources */,
+				10BAA2CB1B5FCB4F004FE478 /* ORKProgressView.m in Sources */,
 				86C40D861A8D7C5C00081FAC /* ORKSelectionTitleLabel.m in Sources */,
 				86C40D001A8D7C5C00081FAC /* ORKChoiceViewCell.m in Sources */,
 				86C40C4C1A8D7C5C00081FAC /* ORKSpatialSpanTargetView.m in Sources */,
 				86C40D9E1A8D7C5C00081FAC /* ORKSubheadlineLabel.m in Sources */,
+				10864CA31B27146B000F4158 /* ORKPSATContentView.m in Sources */,
+				6146D0A41B84A91E0068491D /* ORKLineGraphAccessibilityElement.m in Sources */,
 				D42FEFB91AF7557000A124F8 /* ORKImageCaptureView.m in Sources */,
 				86C40C401A8D7C5C00081FAC /* ORKSpatialSpanMemoryContentView.m in Sources */,
+				BCB6E6671B7D535F000D5B34 /* ORKXAxisView.m in Sources */,
 				147503BC1AEE807C004B17F3 /* ORKToneAudiometryStepViewController.m in Sources */,
 				86AD910B1AB7AD1E00361FEB /* ORKNavigationContainerView.m in Sources */,
 				865EA1631AB8DF750037C68E /* ORKDateTimePicker.m in Sources */,
@@ -2218,6 +2497,7 @@
 				D458520B1AF6CCFA00A2DE13 /* ORKImageCaptureCameraPreviewView.m in Sources */,
 				86C40E1A1A8D7C5C00081FAC /* ORKConsentSection.m in Sources */,
 				86C40C241A8D7C5C00081FAC /* ORKCountdownStep.m in Sources */,
+				BCB6E65C1B7D534C000D5B34 /* ORKDiscreteGraphChartView.m in Sources */,
 				86C40CA21A8D7C5C00081FAC /* ORKHealthQuantityTypeRecorder.m in Sources */,
 				86C40DC01A8D7C5C00081FAC /* ORKTableViewCell.m in Sources */,
 				BC41942A1AE8453A00073D6B /* ORKObserver.m in Sources */,
@@ -2265,7 +2545,9 @@
 				86C40D761A8D7C5C00081FAC /* ORKScaleRangeLabel.m in Sources */,
 				86C40C741A8D7C5C00081FAC /* CMPedometerData+ORKJSONDictionary.m in Sources */,
 				86AD91151AB7B97E00361FEB /* ORKQuestionStepView.m in Sources */,
+				10864CA11B27146B000F4158 /* ORKPSATStepViewController.m in Sources */,
 				86C40C5C1A8D7C5C00081FAC /* ORKWalkingTaskStep.m in Sources */,
+				257FCE241B4D37A80001EF06 /* ORKTowerOfHanoiTower.m in Sources */,
 				86C40C3C1A8D7C5C00081FAC /* ORKSpatialSpanGameState.m in Sources */,
 				86C40CF41A8D7C5C00081FAC /* ORKBodyLabel.m in Sources */,
 				86C40C941A8D7C5C00081FAC /* ORKAudioRecorder.m in Sources */,
@@ -2277,11 +2559,13 @@
 				86C40C501A8D7C5C00081FAC /* ORKTappingContentView.m in Sources */,
 				86C40CEC1A8D7C5C00081FAC /* ORKAnswerTextField.m in Sources */,
 				86C40C441A8D7C5C00081FAC /* ORKSpatialSpanMemoryStep.m in Sources */,
+				24898B0E1B7186C000B0E7E7 /* ORKScaleRangeImageView.m in Sources */,
 				86C40DD81A8D7C5C00081FAC /* ORKUnitLabel.m in Sources */,
 				86C40D361A8D7C5C00081FAC /* ORKHelpers.m in Sources */,
 				86C40C181A8D7C5C00081FAC /* ORKAudioContentView.m in Sources */,
 				86C40C8E1A8D7C5C00081FAC /* ORKActiveStepViewController.m in Sources */,
 				B183A5011A8535D100C76870 /* (null) in Sources */,
+				10864CA51B27146B000F4158 /* ORKPSATKeyboardView.m in Sources */,
 				86C40CE61A8D7C5C00081FAC /* ORKAnswerFormat.m in Sources */,
 				25ECC0961AFBD68300F3D63B /* ORKReactionTimeStep.m in Sources */,
 				BC13CE3A1B0660220044153C /* ORKNavigableOrderedTask.m in Sources */,
@@ -2289,11 +2573,15 @@
 				86C40DA81A8D7C5C00081FAC /* ORKSurveyAnswerCellForImageSelection.m in Sources */,
 				86C40CCE1A8D7C5C00081FAC /* ORKImageSelectionView.m in Sources */,
 				86C40D461A8D7C5C00081FAC /* ORKInstructionStepViewController.m in Sources */,
+				BCB6E6611B7D534C000D5B34 /* ORKLineGraphChartView.m in Sources */,
 				86C40C7C1A8D7C5C00081FAC /* ORKAccelerometerRecorder.m in Sources */,
 				86C40C861A8D7C5C00081FAC /* ORKActiveStepTimer.m in Sources */,
 				B11C549B1A9EEF8800265E61 /* ORKConsentSharingStep.m in Sources */,
 				86C40DE01A8D7C5C00081FAC /* ORKVerticalContainerView.m in Sources */,
-				86C40CC61A8D7C5C00081FAC /* ORKCompletionStepViewController.m in Sources */,
+				BCD192EC1B81245500FCC08A /* ORKPieChartTitleTextView.m in Sources */,
+				861D2AF71B843968008C4CD0 /* ORKCompletionStepViewController.m in Sources */,
+				BCB6E65F1B7D534C000D5B34 /* ORKGraphChartView.m in Sources */,
+				861D2AE91B840991008C4CD0 /* ORKTimedWalkStep.m in Sources */,
 				86C40D661A8D7C5C00081FAC /* ORKQuestionStepViewController.m in Sources */,
 				86C40DF41A8D7C5C00081FAC /* ORKConsentReviewController.m in Sources */,
 				147503BA1AEE807C004B17F3 /* ORKToneAudiometryStep.m in Sources */,
@@ -2301,11 +2589,15 @@
 				86C40D2A1A8D7C5C00081FAC /* ORKFormTextView.m in Sources */,
 				86C40DD41A8D7C5C00081FAC /* ORKTextButton.m in Sources */,
 				86C40C981A8D7C5C00081FAC /* ORKDataLogger.m in Sources */,
+				BCB6E66D1B7D537B000D5B34 /* ORKRangedPoint.m in Sources */,
 				86C40D0C1A8D7C5C00081FAC /* ORKCustomStepView.m in Sources */,
 				86C40C1C1A8D7C5C00081FAC /* ORKAudioStep.m in Sources */,
+				BCC1CD9B1B7ED64F00D86886 /* ORKYAxisView.m in Sources */,
 				86C40D581A8D7C5C00081FAC /* ORKOrderedTask.m in Sources */,
 				86C40D601A8D7C5C00081FAC /* ORKQuestionStep.m in Sources */,
 				86C40E381A8D7C5C00081FAC /* ORKVisualConsentTransitionAnimator.m in Sources */,
+				BCB6E64B1B7D531C000D5B34 /* ORKPieChartView.m in Sources */,
+				10864C9F1B27146B000F4158 /* ORKPSATStep.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -2390,6 +2682,7 @@
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
+				ENABLE_TESTABILITY = YES;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_PREPROCESSOR_DEFINITIONS = (
@@ -2407,6 +2700,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				TARGETED_DEVICE_FAMILY = 1;
+				TOOLCHAINS = default;
 			};
 			name = Debug;
 		};
@@ -2437,6 +2731,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				SDKROOT = iphoneos;
 				TARGETED_DEVICE_FAMILY = 1;
+				TOOLCHAINS = default;
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;
@@ -2461,6 +2756,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 8.2;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = "com.apple.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
 			name = Debug;
@@ -2482,6 +2778,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 8.2;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = NO;
+				PRODUCT_BUNDLE_IDENTIFIER = "com.apple.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
 			name = Release;
@@ -2509,6 +2806,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				MODULEMAP_FILE = ResearchKit/module.modulemap;
 				MTL_ENABLE_DEBUG_INFO = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = "apple.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = ResearchKit;
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;
@@ -2536,6 +2834,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				MODULEMAP_FILE = ResearchKit/module.modulemap;
 				MTL_ENABLE_DEBUG_INFO = NO;
+				PRODUCT_BUNDLE_IDENTIFIER = "apple.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = ResearchKit;
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;

ResearchKit.xcodeproj/xcshareddata/xcschemes/ResearchKit.xcscheme

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0630"
-   version = "1.8">
+   LastUpgradeVersion = "0700"
+   version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
       buildImplicitDependencies = "YES">
@@ -23,10 +23,10 @@
       </BuildActionEntries>
    </BuildAction>
    <TestAction
+      buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      buildConfiguration = "Debug">
+      shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
          <TestableReference
             skipped = "NO">
@@ -48,13 +48,15 @@
             ReferencedContainer = "container:ResearchKit.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
    </TestAction>
    <LaunchAction
+      buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Debug"
       ignoresPersistentStateOnLaunch = "NO"
       debugDocumentVersioning = "YES"
       debugServiceExtension = "internal"
@@ -72,10 +74,10 @@
       </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
+      buildConfiguration = "Release"
       shouldUseLaunchSchemeArgsEnv = "YES"
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Release"
       debugDocumentVersioning = "YES">
       <MacroExpansion>
          <BuildableReference

ResearchKit.xcodeproj/xcshareddata/xcschemes/docs.xcscheme

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0630"
-   version = "1.8">
+   LastUpgradeVersion = "0700"
+   version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
       buildImplicitDependencies = "YES">
@@ -23,19 +23,21 @@
       </BuildActionEntries>
    </BuildAction>
    <TestAction
+      buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      buildConfiguration = "Debug">
+      shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
       </Testables>
+      <AdditionalOptions>
+      </AdditionalOptions>
    </TestAction>
    <LaunchAction
+      buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Debug"
       ignoresPersistentStateOnLaunch = "NO"
       debugDocumentVersioning = "YES"
       debugServiceExtension = "internal"
@@ -53,10 +55,10 @@
       </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
+      buildConfiguration = "Release"
       shouldUseLaunchSchemeArgsEnv = "YES"
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Release"
       debugDocumentVersioning = "YES">
       <MacroExpansion>
          <BuildableReference

ResearchKit/Accessibility/ORKAccessibility.h

@@ -32,3 +32,4 @@
 // Shared header for accessibility functionality.
 #import "UIView+ORKAccessibility.h"
 #import "ORKAccessibilityFunctions.h"
+#import "ORKLineGraphAccessibilityElement.h"

ResearchKit/Accessibility/ORKLineGraphAccessibilityElement.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (c) 2015, Apple Inc. 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 <UIKit/UIKit.h>
+
+@interface ORKLineGraphAccessibilityElement : UIAccessibilityElement
+
+- (nonnull instancetype)initWithAccessibilityContainer:(nonnull UIView *)container index:(NSInteger)index maxIndex:(NSInteger)maxIndex;
+
+@end

ResearchKit/Accessibility/ORKLineGraphAccessibilityElement.m

@@ -0,0 +1,62 @@
+/*
+ Copyright (c) 2015, Apple Inc. 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 "ORKLineGraphAccessibilityElement.h"
+
+@interface ORKLineGraphAccessibilityElement()
+@property (assign, nonatomic) NSInteger index;
+@property (assign, nonatomic) NSInteger maxIndex;
+@end
+
+@implementation ORKLineGraphAccessibilityElement
+
+- (nonnull instancetype)initWithAccessibilityContainer:(nonnull UIView *)container index:(NSInteger)index maxIndex:(NSInteger)maxIndex {
+    self = [super initWithAccessibilityContainer:container];
+    if (self) {
+        self.index = index;
+        self.maxIndex = maxIndex;
+    }
+    return self;
+}
+
+- (CGRect)accessibilityFrame {
+    if (self.maxIndex == 0) {
+        return [super accessibilityFrame];
+    }
+    
+    CGRect containerFrame = [self.accessibilityContainer frame];
+    CGFloat height = CGRectGetHeight(containerFrame);
+    CGFloat width = CGRectGetWidth(containerFrame) / self.maxIndex;
+    CGFloat x = self.index * width;
+    
+    return UIAccessibilityConvertFrameToScreenCoordinates(CGRectMake(x, 0, width, height), self.accessibilityContainer);
+}
+
+@end

ResearchKit/ActiveTasks/HKSample+ORKJSONDictionary.m

@@ -72,7 +72,7 @@ static NSString *const kHKCorrelatedObjectsKey = @"objects";
     if ((options & ORKSampleIncludeUUID)) {
         NSUUID *uuid = [self UUID];
         if (uuid) {
-            mutableDictionary[kHKUUIDKey] = [uuid UUIDString];
+            mutableDictionary[kHKUUIDKey] = uuid.UUIDString;
         }
     }
     

ResearchKit/ActiveTasks/ORKAccelerometerRecorder.m

@@ -109,17 +109,12 @@
     
     [self.motionManager stopAccelerometerUpdates];
     
-    [self.motionManager
-     startAccelerometerUpdatesToQueue:[[NSOperationQueue alloc] init]
-     withHandler:^(CMAccelerometerData *data, NSError *error)
-     {
+    [self.motionManager startAccelerometerUpdatesToQueue:[[NSOperationQueue alloc] init] withHandler:^(CMAccelerometerData *data, NSError *error) {
          BOOL success = NO;
-         if (data)
-         {
+         if (data) {
              success = [_logger append:[data ork_JSONDictionary] error:&error];
          }
-         if (!success)
-         {
+         if (!success) {
              dispatch_async(dispatch_get_main_queue(), ^{
                  _recordingError = error;
                  [self stop];

ResearchKit/ActiveTasks/ORKActiveStep.h

@@ -32,7 +32,9 @@
 #import <ResearchKit/ORKDefines.h>
 #import <ResearchKit/ORKStep.h>
 #import <UIKit/UIKit.h>
+#import <HealthKit/HealthKit.h>
 
+@class ORKRecorderConfiguration;
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -191,7 +193,7 @@ The default value of this property is `NO`.
  
  See also: `ORKRecorderConfiguration` and `ORKRecorder`.
  */
-@property (nonatomic, copy, nullable) NSArray *recorderConfigurations;
+@property (nonatomic, copy, nullable) NSArray<ORKRecorderConfiguration *> *recorderConfigurations;
 
 /**
  The set of HealthKit types the step requests for reading. (read-only)
@@ -203,7 +205,7 @@ The default value of this property is `NO`.
  By default, the property scans the recorders and collates the HealthKit
  types the recorders require. Subclasses may override this implementation.
  */
-@property (nonatomic, readonly, nullable) NSSet *requestedHealthKitTypesForReading;
+@property (nonatomic, readonly, nullable) NSSet<HKObjectType *> *requestedHealthKitTypesForReading;
 
 @end
 

ResearchKit/ActiveTasks/ORKActiveStep.m

@@ -156,10 +156,10 @@
             (self.shouldUseNextAsSkipButton == castObject.shouldUseNextAsSkipButton));
 }
 
-- (NSSet *)requestedHealthKitTypesForReading {
-    NSMutableSet *set = [NSMutableSet set];
+- (NSSet<HKObjectType *> *)requestedHealthKitTypesForReading {
+    NSMutableSet<HKObjectType *> *set = [NSMutableSet set];
     for (ORKRecorderConfiguration *config in self.recorderConfigurations) {
-        NSSet *subset = [config requestedHealthKitTypesForReading];
+        NSSet<HKObjectType *> *subset = [config requestedHealthKitTypesForReading];
         if (subset) {
             [set unionSet:subset];
         }

ResearchKit/ActiveTasks/ORKAudioContentView.m

@@ -64,23 +64,6 @@ static const CGFloat kValueLineMargin = 1.5;
 - (instancetype)initWithFrame:(CGRect)frame {
     self = [super initWithFrame:frame];
     if (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];
-        constraint2.priority = UILayoutPriorityFittingSizeLevel;
-        [NSLayoutConstraint activateConstraints:@[constraint1, constraint2]];
         
 #if TARGET_IPHONE_SIMULATOR
         _values = @[@(0.2),@(0.6),@(0.55), @(0.1), @(0.75), @(0.7)];
@@ -251,7 +234,7 @@ static const CGFloat kValueLineMargin = 1.5;
     [self applyKeyColor];
 }
 
--(void)setFailed:(BOOL)failed {
+- (void)setFailed:(BOOL)failed {
     _failed = failed;
     _alertLabel.text = failed ? ORKLocalizedString(@"AUDIO_GENERIC_ERROR_LABEL", nil) : ORKLocalizedString(@"AUDIO_TOO_LOUD_LABEL", nil);
     [self updateAlertLabelHidden];

ResearchKit/ActiveTasks/ORKCountdownStepViewController.m

@@ -229,7 +229,7 @@
 }
 
 - (void)updateCountdownLabel {
-    _countdownView.timeLabel.text = [NSString stringWithFormat:@"%lu", (unsigned long)_countDown];
+    _countdownView.timeLabel.text = ORKLocalizedStringFromNumber(@(_countDown));
 }
 
 - (void)countDownTimerFired:(ORKActiveStepTimer *)timer finished:(BOOL)finished {

ResearchKit/ActiveTasks/ORKDataLogger.h

@@ -101,6 +101,8 @@ ORK_CLASS_AVAILABLE
  */
 + (ORKDataLogger *)JSONDataLoggerWithDirectory:(NSURL *)url logName:(NSString *)logName delegate:(nullable id<ORKDataLoggerDelegate>)delegate;
 
+- (instancetype)init NS_UNAVAILABLE;
+
 /**
  Returns an initialized data logger using the specified URL, log name, formatter, and delegate.
  
@@ -263,7 +265,7 @@ ORK_CLASS_AVAILABLE
  
  @return `YES` if removing the files succeeded; otherwise, `NO`.
  */
-- (BOOL)removeUploadedFiles:(NSArray *)fileURLs withError:(NSError * __nullable __autoreleasing *)error;
+- (BOOL)removeUploadedFiles:(NSArray<NSURL *> *)fileURLs withError:(NSError * __nullable __autoreleasing *)error;
 
 /**
  Removes all files managed by this logger (files that have the `logName` prefix).
@@ -423,6 +425,8 @@ ORK_CLASS_AVAILABLE
 ORK_CLASS_AVAILABLE
 @interface ORKDataLoggerManager : NSObject <ORKDataLoggerDelegate>
 
+- (instancetype)init NS_UNAVAILABLE;
+
 /**
  Returns an initialized data logger manager using the specified directory and delegate.
  
@@ -489,7 +493,7 @@ ORK_CLASS_AVAILABLE
 - (void)removeDataLogger:(ORKDataLogger *)logger;
 
 /// Returns the set of log names of the data loggers managed by this object.
-- (NSArray *)logNames;
+- (NSArray<NSString *> *)logNames;
 
 /**
  Enumerates all the logs that need upload across all data loggers, sorted from oldest to first.
@@ -514,7 +518,7 @@ ORK_CLASS_AVAILABLE
  
  @return `YES` if the operation succeeds; otherwise, `NO`.
  */
-- (BOOL)unmarkUploadedFiles:(NSArray *)fileURLs error:(NSError * __nullable __autoreleasing *)error;
+- (BOOL)unmarkUploadedFiles:(NSArray<NSURL *> *)fileURLs error:(NSError * __nullable __autoreleasing *)error;
 
 /**
  Removes a set of uploaded files.
@@ -528,7 +532,7 @@ ORK_CLASS_AVAILABLE
  
  @return `YES` if the operation succeeds; otherwise, `NO`.
  */
-- (BOOL)removeUploadedFiles:(NSArray *)fileURLs error:(NSError * __nullable __autoreleasing *)error;
+- (BOOL)removeUploadedFiles:(NSArray<NSURL *> *)fileURLs error:(NSError * __nullable __autoreleasing *)error;
 
 /**
  Removes old and uploaded logs to bring total bytes down to a threshold.

ResearchKit/ActiveTasks/ORKDataLogger.m

@@ -446,6 +446,12 @@ static NSInteger _ORKJSON_terminatorLength = 0;
     return [[ORKDataLogger alloc] initWithDirectory:url logName:logName formatter:[ORKJSONLogFormatter new] delegate:delegate];
 }
 
+
+- (instancetype)init {
+    ORKThrowMethodUnavailableException();
+    return nil;
+}
+
 - (instancetype)initWithDirectory:(NSURL *)url logName:(NSString *)logName formatter:(ORKLogFormatter *)formatter delegate:(id<ORKDataLoggerDelegate>)delegate {
     self = [super init];
     if (self) {
@@ -626,7 +632,7 @@ static NSInteger _ORKJSON_terminatorLength = 0;
     return success;
 }
 
-- (BOOL)removeUploadedFiles:(NSArray *)fileURLs withError:(NSError * __autoreleasing *)error {
+- (BOOL)removeUploadedFiles:(NSArray<NSURL *> *)fileURLs withError:(NSError * __autoreleasing *)error {
     __block BOOL success = NO;
     dispatch_sync(_queue, ^{
         success = [self queue_removeUploadedFiles:fileURLs withError:error];
@@ -942,7 +948,7 @@ static NSInteger _ORKJSON_terminatorLength = 0;
     return success;
 }
 
-- (BOOL)queue_removeUploadedFiles:(NSArray *)fileURLs withError:(NSError * __autoreleasing *)error {
+- (BOOL)queue_removeUploadedFiles:(NSArray<NSURL *> *)fileURLs withError:(NSError * __autoreleasing *)error {
     NSFileManager *fileManager = [NSFileManager defaultManager];
     __block NSMutableArray *errors = [NSMutableArray array];
     BOOL success = [self queue_enumerateLogs:^(NSURL *logFileUrl, BOOL *stop) {
@@ -1036,6 +1042,12 @@ static NSInteger _ORKJSON_terminatorLength = 0;
 
 @implementation ORKDataLoggerManager
 
+
+- (instancetype)init {
+    ORKThrowMethodUnavailableException();
+    return nil;
+}
+
 - (instancetype)initWithDirectory:(NSURL *)directory delegate:(id<ORKDataLoggerManagerDelegate>)delegate {
     self = [super init];
     if (self) {
@@ -1151,8 +1163,8 @@ static NSInteger _ORKJSON_terminatorLength = 0;
     return dataLogger;
 }
 
-- (NSArray *)logNames {
-    __block NSArray *logNames = nil;
+- (NSArray<NSString *> *)logNames {
+    __block NSArray<NSString *> *logNames = nil;
     dispatch_sync(_queue, ^{
         logNames = [_records allKeys];
     });
@@ -1210,7 +1222,7 @@ static NSInteger _ORKJSON_terminatorLength = 0;
     return success;
 }
 
-- (BOOL)queue_removeUploadedFiles:(NSArray *)fileURLs error:(NSError * __autoreleasing *)error {
+- (BOOL)queue_removeUploadedFiles:(NSArray<NSURL *> *)fileURLs error:(NSError * __autoreleasing *)error {
     BOOL success = YES;
     NSMutableArray *notRemoved = [NSMutableArray array];
     for (NSURL *url in fileURLs) {
@@ -1233,7 +1245,7 @@ static NSInteger _ORKJSON_terminatorLength = 0;
     return success;
 }
 
-- (BOOL)removeUploadedFiles:(NSArray *)fileURLs error:(NSError * __autoreleasing *)error {
+- (BOOL)removeUploadedFiles:(NSArray<NSURL *> *)fileURLs error:(NSError * __autoreleasing *)error {
     
     __block BOOL success = YES;
     dispatch_sync(_queue, ^{
@@ -1242,9 +1254,9 @@ static NSInteger _ORKJSON_terminatorLength = 0;
     return success;
 }
 
-- (BOOL)queue_unmarkUploadedFiles:(NSArray *)fileURLs error:(NSError * __autoreleasing *)error {
+- (BOOL)queue_unmarkUploadedFiles:(NSArray<NSURL *> *)fileURLs error:(NSError * __autoreleasing *)error {
     BOOL success = YES;
-    NSMutableArray *notRemoved = [NSMutableArray array];
+    NSMutableArray<NSURL *> *notRemoved = [NSMutableArray array];
     for (NSURL *url in fileURLs) {
         NSString *logName = [url ork_logNameInDirectory:_directory];
         ORKDataLogger *logger = _records[logName];
@@ -1265,7 +1277,7 @@ static NSInteger _ORKJSON_terminatorLength = 0;
     return success;
 }
 
-- (BOOL)unmarkUploadedFiles:(NSArray *)fileURLs error:(NSError *__autoreleasing *)error {
+- (BOOL)unmarkUploadedFiles:(NSArray<NSURL *> *)fileURLs error:(NSError *__autoreleasing *)error {
     __block BOOL success = YES;
     dispatch_sync(_queue, ^{
         success = [self queue_unmarkUploadedFiles:fileURLs error:error];

ResearchKit/ActiveTasks/ORKDeviceMotionRecorder.m

@@ -100,21 +100,16 @@
     
     [self.motionManager stopDeviceMotionUpdates];
     
-    [self.motionManager
-     startDeviceMotionUpdatesToQueue:[NSOperationQueue mainQueue]
-     withHandler:^(CMDeviceMotion *data, NSError *error)
-     {
+    [self.motionManager startDeviceMotionUpdatesToQueue:[NSOperationQueue mainQueue] withHandler:^(CMDeviceMotion *data, NSError *error) {
          BOOL success = NO;
-         if (data)
-         {
+         if (data) {
              success = [_logger append:[data ork_JSONDictionary] error:&error];
              id delegate = self.delegate;
              if ([delegate respondsToSelector:@selector(deviceMotionRecorderDidUpdateWithMotion:)]) {
                  [delegate deviceMotionRecorderDidUpdateWithMotion:data];
              }
          }
-         if (!success)
-         {
+         if (!success) {
              dispatch_async(dispatch_get_main_queue(), ^{
                  [self finishRecordingWithError:error];
              });

ResearchKit/ActiveTasks/ORKFitnessContentView.m

@@ -139,7 +139,7 @@
 
 - (void)willMoveToWindow:(UIWindow *)newWindow {
     [super willMoveToWindow:newWindow];
-    _screenType = ORKGetScreenTypeForWindow(newWindow);
+    _screenType = ORKGetVerticalScreenTypeForWindow(newWindow);
     [self updateConstraintConstants];
 }
 

ResearchKit/ActiveTasks/ORKLocationRecorder.h

@@ -30,6 +30,7 @@
 
 
 #import <ResearchKit/ORKRecorder.h>
+#import <CoreLocation/CoreLocation.h>
 
 
 NS_ASSUME_NONNULL_BEGIN
@@ -58,6 +59,12 @@ ORK_CLASS_AVAILABLE
                               step:(nullable ORKStep *)step
                    outputDirectory:(nullable NSURL *)outputDirectory NS_DESIGNATED_INITIALIZER;
 
+
+/**
+ The location manager, if any, being used by this recorder.
+ */
+@property (nonatomic, strong, nullable, readonly) CLLocationManager *locationManager;
+
 @end
 
 NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKLocationRecorder.m

@@ -43,7 +43,7 @@
     BOOL _started;
 }
 
-@property (nonatomic, strong) CLLocationManager *locationManager;
+@property (nonatomic, strong, nullable) CLLocationManager *locationManager;
 
 @property (nonatomic) NSTimeInterval uptime;
 

ResearchKit/ActiveTasks/ORKPSATContentView.h

@@ -0,0 +1,52 @@
+/*
+ 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 <ResearchKit/ResearchKit_Private.h>
+#import "ORKCustomStepView_Internal.h"
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class ORKPSATKeyboardView;
+
+@interface ORKPSATContentView : ORKActiveStepCustomView
+
+@property (nonatomic, strong) ORKPSATKeyboardView *keyboardView;
+
+- (instancetype)initWithFrame:(CGRect)frame NS_UNAVAILABLE;
+- (instancetype)initWithPresentationMode:(ORKPSATPresentationMode)presentationMode NS_DESIGNATED_INITIALIZER;
+- (void)setEnabled:(BOOL)enabled;
+- (void)setAddition:(NSUInteger)additionIndex forTotal:(NSUInteger)totalAddition withDigit:(NSNumber *)digit;
+- (void)setProgress:(CGFloat)progress animated:(BOOL)animated;
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKPSATContentView.m

@@ -0,0 +1,163 @@
+/*
+ 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 "ORKPSATContentView.h"
+#import "ORKSkin.h"
+#import "ORKPSATKeyboardView.h"
+#import "ORKTapCountLabel.h"
+#import "ORKBorderedButton.h"
+#import "ORKVoiceEngine.h"
+#import "ORKHelpers.h"
+
+
+@interface ORKPSATContentView ()
+
+@property (nonatomic, assign, getter = isAuditory) BOOL auditory;
+@property (nonatomic, strong) UIProgressView *progressView;
+@property (nonatomic, strong) ORKTapCountLabel *digitLabel;
+@property (nonatomic, assign) ORKScreenType screenType;
+@property (nonatomic, strong) NSArray *constraints;
+
+@end
+
+
+@implementation ORKPSATContentView
+
+- (instancetype)initWithFrame:(CGRect)frame {
+    ORKThrowMethodUnavailableException();
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+    self = [self initWithPresentationMode:ORKPSATPresentationModeAuditory];
+    return self;
+}
+
+- (instancetype)initWithPresentationMode:(ORKPSATPresentationMode)presentationMode {
+    self = [super initWithFrame:CGRectZero];
+    
+    if (self) {
+        
+        _screenType = ORKGetVerticalScreenTypeForWindow(self.window);
+        
+        _digitLabel = [ORKTapCountLabel new];
+        _digitLabel.textAlignment = NSTextAlignmentCenter;
+        _digitLabel.translatesAutoresizingMaskIntoConstraints = NO;
+        [self addSubview:_digitLabel];
+        _auditory = (presentationMode & ORKPSATPresentationModeAuditory) ? YES : NO;
+        if (!(presentationMode & ORKPSATPresentationModeVisual)) {
+            _digitLabel.hidden = YES;
+        }
+        
+        _progressView = [UIProgressView new];
+        _progressView.translatesAutoresizingMaskIntoConstraints = NO;
+        _progressView.progressTintColor = [self tintColor];
+        [_progressView setAlpha:0];
+        [self addSubview:_progressView];
+        
+        _keyboardView = [ORKPSATKeyboardView new];
+        _keyboardView.translatesAutoresizingMaskIntoConstraints = NO;
+        [self addSubview:_keyboardView];
+        
+        self.translatesAutoresizingMaskIntoConstraints = NO;
+
+        [self setNeedsUpdateConstraints];
+    }
+    
+    return self;
+}
+
+- (void)setEnabled:(BOOL)enabled {
+    self.keyboardView.enabled = enabled;
+}
+
+- (void)setAddition:(NSUInteger)additionIndex forTotal:(NSUInteger)totalAddition withDigit:(NSNumber *)digit {
+    if (digit.integerValue == -1) {
+        self.digitLabel.textColor = [[UIColor blackColor] colorWithAlphaComponent:0.3f];
+        self.digitLabel.text = ORKLocalizedString(@"PSAT_NO_DIGIT", nil);
+    } else {
+        [self.keyboardView.selectedAnswerButton setSelected:NO];
+        self.digitLabel.textColor = nil;
+        self.digitLabel.text = [NSNumberFormatter localizedStringFromNumber:digit
+                                                                numberStyle:NSNumberFormatterNoStyle];
+        if (self.isAuditory) {
+            [[ORKVoiceEngine sharedVoiceEngine] speakInt:digit.integerValue];
+        }
+    }
+}
+
+- (void)setProgress:(CGFloat)progress animated:(BOOL)animated {
+    [self.progressView setProgress:progress animated:animated];
+    [UIView animateWithDuration:animated ? 0.2 : 0 animations:^{
+        [self.progressView setAlpha:(progress == 0) ? 0 : 1];
+    }];
+}
+
+- (void)updateConstraints {
+    if ([self.constraints count]) {
+        [NSLayoutConstraint deactivateConstraints:self.constraints];
+        self.constraints = nil;
+    }
+    
+    const CGFloat ORKPSATKeyboardWidth = ORKGetMetricForScreenType(ORKScreenMetricPSATKeyboardViewWidth, self.screenType);
+    const CGFloat ORKPSATKeyboardHeight = ORKGetMetricForScreenType(ORKScreenMetricPSATKeyboardViewHeight, self.screenType);
+    
+    NSMutableArray *constraintsArray = [NSMutableArray array];
+
+    NSDictionary *views = NSDictionaryOfVariableBindings(_progressView, _digitLabel, _keyboardView);
+    
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_progressView]-|"
+                                             options:(NSLayoutFormatOptions)0
+                                             metrics:nil views:views]];
+    
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"H:|-[_keyboardView(==%f)]-|", ORKPSATKeyboardWidth]
+                                             options:(NSLayoutFormatOptions)0
+                                             metrics:nil views:views]];
+    
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"V:[_keyboardView(==%f)]", ORKPSATKeyboardHeight]
+                                             options:(NSLayoutFormatOptions)0
+                                             metrics:nil views:views]];
+    
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_progressView]-[_digitLabel]-(>=10)-[_keyboardView]-|"
+                                             options:NSLayoutFormatAlignAllCenterX
+                                             metrics:nil views:views]];
+    
+    self.constraints = constraintsArray;
+    [self addConstraints:self.constraints];
+    
+    [NSLayoutConstraint activateConstraints:self.constraints];
+    [super updateConstraints];
+}
+
+@end

ResearchKit/ActiveTasks/ORKPSATKeyboardView.h

@@ -0,0 +1,55 @@
+/*
+ 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 <ResearchKit/ResearchKit.h>
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class ORKBorderedButton;
+@protocol ORKPSATKeyboardViewDelegate;
+
+@interface ORKPSATKeyboardView : UIView
+
+@property (nonatomic, weak) id<ORKPSATKeyboardViewDelegate> delegate;
+@property (nonatomic, weak) ORKBorderedButton *selectedAnswerButton;
+
+- (void)setEnabled:(BOOL)enabled;
+
+@end
+
+@protocol ORKPSATKeyboardViewDelegate <NSObject>
+
+- (void)keyboardView:(ORKPSATKeyboardView *)keyboardView didSelectAnswer:(NSInteger)answer;
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKPSATKeyboardView.m

@@ -0,0 +1,158 @@
+/*
+ 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 "ORKPSATKeyboardView.h"
+#import "ORKBorderedButton.h"
+
+
+NSUInteger const ORKPSATMinimumAnswer = 3;
+NSUInteger const ORKPSATMaximumAnswer = 17;
+
+@interface ORKPSATKeyboardView ()
+
+@property (nonatomic, strong, readonly) NSArray *answerButtons;
+@property (nonatomic, strong) NSArray *constraints;
+
+@end
+
+
+@implementation ORKPSATKeyboardView
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        NSMutableArray *buttonsArray = [[NSMutableArray alloc] initWithCapacity:(ORKPSATMaximumAnswer - ORKPSATMinimumAnswer) + 1];
+        ORKBorderedButton *answerButton = nil;
+        for (int i = ORKPSATMinimumAnswer; i <= ORKPSATMaximumAnswer; i++) {
+            answerButton = [self answerButtonWithTitle:[NSNumberFormatter localizedStringFromNumber:@(i)
+                                                                                        numberStyle:NSNumberFormatterNoStyle]];
+            [buttonsArray addObject:answerButton];
+            [self addSubview:answerButton];
+        }
+        _answerButtons = [NSArray arrayWithArray:buttonsArray];
+        
+        self.translatesAutoresizingMaskIntoConstraints = NO;
+        
+        [self setNeedsUpdateConstraints];
+    }
+    
+    return self;
+}
+
+- (ORKBorderedButton *)answerButtonWithTitle:(NSString *)title {
+    ORKBorderedButton *answerButton = [ORKBorderedButton new];
+    answerButton.translatesAutoresizingMaskIntoConstraints = NO;
+    [answerButton setTitle:title forState:UIControlStateNormal];
+    [answerButton addTarget:self action:@selector(buttonPressed:forEvent:) forControlEvents:UIControlEventTouchUpInside];
+    answerButton.accessibilityTraits |= UIAccessibilityTraitKeyboardKey;
+    return answerButton;
+}
+
+- (void)setEnabled:(BOOL)enabled {
+    for (ORKBorderedButton *answerButton in self.answerButtons) {
+        [answerButton setEnabled:enabled];
+    }
+}
+
+- (void)updateConstraints {
+    if ([self.constraints count]) {
+        [NSLayoutConstraint deactivateConstraints:self.constraints];
+        self.constraints = nil;
+    }
+    
+    NSMutableArray *constraintsArray = [NSMutableArray array];
+    
+    ORKBorderedButton *answer3Button = self.answerButtons[0];
+    ORKBorderedButton *answer4Button = self.answerButtons[1];
+    ORKBorderedButton *answer5Button = self.answerButtons[2];
+    ORKBorderedButton *answer6Button = self.answerButtons[3];
+    ORKBorderedButton *answer7Button = self.answerButtons[4];
+    ORKBorderedButton *answer8Button = self.answerButtons[5];
+    ORKBorderedButton *answer9Button = self.answerButtons[6];
+    ORKBorderedButton *answer10Button = self.answerButtons[7];
+    ORKBorderedButton *answer11Button = self.answerButtons[8];
+    ORKBorderedButton *answer12Button = self.answerButtons[9];
+    ORKBorderedButton *answer13Button = self.answerButtons[10];
+    ORKBorderedButton *answer14Button = self.answerButtons[11];
+    ORKBorderedButton *answer15Button = self.answerButtons[12];
+    ORKBorderedButton *answer16Button = self.answerButtons[13];
+    ORKBorderedButton *answer17Button = self.answerButtons[14];
+
+    
+    NSDictionary *views = NSDictionaryOfVariableBindings(answer3Button, answer4Button, answer5Button, answer6Button, answer7Button, answer8Button, answer9Button, answer10Button, answer11Button, answer12Button, answer13Button, answer14Button, answer15Button, answer16Button, answer17Button);
+    
+    // First line of answer buttons
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[answer3Button]-[answer4Button(==answer3Button)]-[answer5Button(==answer3Button)]-[answer6Button(==answer3Button)]-[answer7Button(==answer3Button)]-|"
+                                             options:NSLayoutFormatAlignAllCenterY|NSLayoutFormatAlignAllTop|NSLayoutFormatAlignAllBottom
+                                             metrics:nil views:views]];
+    
+    // Second line of answer buttons
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[answer8Button]-[answer9Button(==answer8Button)]-[answer10Button(==answer8Button)]-[answer11Button(==answer8Button)]-[answer12Button(==answer8Button)]-|"
+                                             options:NSLayoutFormatAlignAllCenterY|NSLayoutFormatAlignAllTop|NSLayoutFormatAlignAllBottom
+                                             metrics:nil views:views]];
+    
+    // Third line of answer buttons
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[answer13Button]-[answer14Button(==answer13Button)]-[answer15Button(==answer13Button)]-[answer16Button(==answer13Button)]-[answer17Button(==answer13Button)]-|"
+                                             options:NSLayoutFormatAlignAllCenterY|NSLayoutFormatAlignAllTop|NSLayoutFormatAlignAllBottom
+                                             metrics:nil views:views]];
+    
+    // Align vertically
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[answer3Button]-[answer8Button(==answer3Button)]-[answer13Button(==answer3Button)]-|"
+                                             options:(NSLayoutFormatOptions)0
+                                             metrics:nil views:views]];
+    
+    self.constraints = constraintsArray;
+    [self addConstraints:self.constraints];
+    
+    [NSLayoutConstraint activateConstraints:self.constraints];
+    [super updateConstraints];
+}
+
+#pragma mark buttonAction
+
+- (IBAction)buttonPressed:(id)button forEvent:(UIEvent *)event {
+    ORKBorderedButton *tappedAnswerButton = (ORKBorderedButton *)button;
+    
+    [self.selectedAnswerButton setSelected:NO];
+    self.selectedAnswerButton = tappedAnswerButton;
+    [self.selectedAnswerButton setSelected:YES];
+    
+    if ([self.delegate respondsToSelector:@selector(keyboardView:didSelectAnswer:)]) {
+        NSInteger answerValue = [self.answerButtons indexOfObject:tappedAnswerButton] + ORKPSATMinimumAnswer;
+        [self.delegate keyboardView:self didSelectAnswer:answerValue];
+    }
+}
+
+@end

ResearchKit/ActiveTasks/ORKPSATStep.h

@@ -0,0 +1,47 @@
+/*
+ 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 <ResearchKit/ResearchKit_Private.h>
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+ORK_CLASS_AVAILABLE
+@interface ORKPSATStep : ORKActiveStep
+
+@property (nonatomic, assign) ORKPSATPresentationMode presentationMode;
+@property (nonatomic, assign) NSTimeInterval interStimulusInterval;
+@property (nonatomic, assign) NSTimeInterval stimulusDuration;
+@property (nonatomic, assign) NSInteger seriesLength;
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKPSATStep.m

@@ -0,0 +1,93 @@
+/*
+ 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 "ORKPSATStep.h"
+#import "ORKPSATStepViewController.h"
+
+
+@implementation ORKPSATStep
+
++ (Class)stepViewControllerClass {
+    return [ORKPSATStepViewController class];
+}
+
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    self = [super initWithIdentifier:identifier];
+    if (self) {
+        self.shouldStartTimerAutomatically = YES;
+        self.shouldShowDefaultTimer = NO;
+        self.shouldContinueOnFinish = YES;
+    }
+    return self;
+}
+
+- (void)validateParameters {
+    [super validateParameters];
+
+    NSTimeInterval const ORKPSATInterStimulusMinimumInterval = 1.0;
+    NSTimeInterval const ORKPSATInterStimulusMaximumInterval = 5.0;
+    
+    NSTimeInterval const ORKPSATStimulusMinimumDuration = 0.2;
+    
+    NSInteger const ORKPSATSerieMinimumLength = 10;
+    NSInteger const ORKPSATSerieMaximumLength = 120;
+
+    NSTimeInterval totalDuration = (self.seriesLength + 1) * self.interStimulusInterval;
+    if (self.stepDuration != totalDuration) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"step duration must be equal to %@ seconds.", @(totalDuration)] userInfo:nil];
+    }
+    
+    if (!(self.presentationMode & ORKPSATPresentationModeAuditory) &&
+        !(self.presentationMode & ORKPSATPresentationModeVisual)) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"step presentation mode must be auditory and/or visual." userInfo:nil];
+    }
+    
+    if (self.interStimulusInterval < ORKPSATInterStimulusMinimumInterval ||
+        self.interStimulusInterval > ORKPSATInterStimulusMaximumInterval) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"inter stimulus interval must be greater than or equal to %@ seconds and less than or equal to %@ seconds.", @(ORKPSATInterStimulusMinimumInterval), @(ORKPSATInterStimulusMaximumInterval)] userInfo:nil];
+    }
+    
+    if ((self.presentationMode & ORKPSATPresentationModeVisual) &&
+        (self.stimulusDuration < ORKPSATStimulusMinimumDuration || self.stimulusDuration > self.interStimulusInterval)) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"stimulus duration must be greater than or equal to %@ seconds and less than or equal to %@ seconds.", @(ORKPSATStimulusMinimumDuration), @(self.interStimulusInterval)] userInfo:nil];
+    }
+    
+    if (self.seriesLength < ORKPSATSerieMinimumLength ||
+        self.seriesLength > ORKPSATSerieMaximumLength) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"serie length must be greater than or equal to %@ additions and less than or equal to %@ additions.", @(ORKPSATSerieMinimumLength), @(ORKPSATSerieMaximumLength)] userInfo:nil];
+    }
+}
+
+- (BOOL)allowsBackNavigation {
+    return NO;
+}
+
+@end

ResearchKit/ActiveTasks/ORKPSATStepViewController.h

@@ -0,0 +1,42 @@
+/*
+ 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 <ResearchKit/ResearchKit_Private.h>
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+ORK_CLASS_AVAILABLE
+@interface ORKPSATStepViewController : ORKActiveStepViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKPSATStepViewController.m

@@ -0,0 +1,235 @@
+/*
+ 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 "ORKPSATStepViewController.h"
+#import "ORKActiveStepViewController_Internal.h"
+#import "ORKStepViewController_Internal.h"
+#import "ORKPSATContentView.h"
+#import "ORKPSATStep.h"
+#import "ORKVerticalContainerView.h"
+#import "ORKActiveStepView.h"
+#import "ORKPSATKeyboardView.h"
+
+
+@interface ORKPSATStepViewController () <ORKPSATKeyboardViewDelegate>
+
+@property (nonatomic, strong) NSMutableArray *samples;
+@property (nonatomic, strong) ORKPSATContentView *psatContentView;
+@property (nonatomic, strong) NSArray *digits;
+@property (nonatomic, assign) NSUInteger currentDigitIndex;
+@property (nonatomic, assign) NSInteger currentAnswer;
+@property (nonatomic, strong) ORKActiveStepTimer *clearDigitsTimer;
+@property (nonatomic, assign) NSTimeInterval answerStart;
+@property (nonatomic, assign) NSTimeInterval answerEnd;
+
+@end
+
+@implementation ORKPSATStepViewController
+
+- (instancetype)initWithStep:(ORKStep *)step {
+    self = [super initWithStep:step];
+    
+    if (self) {
+        self.suspendIfInactive = YES;
+    }
+    
+    return self;
+}
+
+- (ORKPSATStep *)psatStep {
+    return (ORKPSATStep *)self.step;
+}
+
+- (NSArray *)arrayWithPSATDigits {
+    NSMutableArray *array = [[NSMutableArray alloc] initWithCapacity:[self psatStep].seriesLength + 1];
+    NSUInteger digit = 0;
+    for (NSUInteger i = 0; i < [self psatStep].seriesLength + 1; i++) {
+        do
+        {
+            digit = (arc4random() % (9)) + 1;
+        } while (digit == ((NSNumber *)[array lastObject]).integerValue);
+        [array addObject:@(digit)];
+    }
+    return array;
+}
+
+- (void)initializeInternalButtonItems {
+    [super initializeInternalButtonItems];
+    
+    // Don't show buttons
+    self.internalContinueButtonItem = nil;
+    self.internalDoneButtonItem = nil;
+}
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.activeStepView.stepViewFillsAvailableSpace = YES;
+    self.psatContentView = [[ORKPSATContentView alloc] initWithPresentationMode:[self psatStep].presentationMode];
+    self.psatContentView.keyboardView.delegate = self;
+    [self.psatContentView setEnabled:NO];
+    self.activeStepView.activeCustomView = self.psatContentView;
+    
+    self.timerUpdateInterval = [self psatStep].interStimulusInterval;
+}
+
+- (ORKStepResult *)result {
+    
+    ORKStepResult *sResult = [super result];
+    
+    NSMutableArray *results = [NSMutableArray arrayWithArray:sResult.results];
+    
+    ORKPSATResult *PSATResult = [[ORKPSATResult alloc] initWithIdentifier:(NSString *__nonnull)self.step.identifier];
+    PSATResult.presentationMode = [self psatStep].presentationMode;
+    PSATResult.interStimulusInterval = [self psatStep].interStimulusInterval;
+    if ([self psatStep].presentationMode & ORKPSATPresentationModeVisual) {
+        PSATResult.stimulusDuration = [self psatStep].stimulusDuration;
+    } else {
+        PSATResult.stimulusDuration = 0.0;
+    }
+    PSATResult.length = [self psatStep].seriesLength;
+    PSATResult.initialDigit = [(NSNumber *)[self.digits objectAtIndex:0] integerValue];
+    NSInteger totalCorrect = 0;
+    BOOL previousAnswerCorrect = NO;
+    NSInteger totalDyad = 0;
+    CGFloat totalTime = 0.0;
+    for (ORKPSATSample *sample in self.samples) {
+        totalTime += sample.time;
+        if (sample.isCorrect) {
+            totalCorrect++;
+            if (previousAnswerCorrect) {
+                totalDyad++;
+            }
+        }
+        previousAnswerCorrect = sample.isCorrect;
+    }
+    PSATResult.totalCorrect = totalCorrect;
+    PSATResult.totalTime = totalTime;
+    PSATResult.totalDyad = totalDyad;
+    PSATResult.samples = self.samples;
+
+    [results addObject:PSATResult];
+    
+    sResult.results = [results copy];
+    
+    return sResult;
+}
+
+- (void)start {
+    self.digits = [self arrayWithPSATDigits];
+    self.currentDigitIndex = 0;
+    [self.psatContentView setAddition:self.currentDigitIndex forTotal:[self psatStep].seriesLength withDigit:[self.digits objectAtIndex:self.currentDigitIndex]];
+    [self.psatContentView setProgress:0.001 animated:NO];
+    self.currentAnswer = -1;
+    self.samples = [NSMutableArray array];
+    
+    if ([self psatStep].presentationMode & ORKPSATPresentationModeVisual &&
+        ([self psatStep].interStimulusInterval - [self psatStep].stimulusDuration) > 0.05 ) {
+        
+        // Don't show `-` if the difference between stimulusDuration and interStimulusInterval is less than timer's resolution.
+        __weak typeof(self) weakSelf = self;
+        self.clearDigitsTimer = [[ORKActiveStepTimer alloc] initWithDuration:[self psatStep].stepDuration
+                                                                    interval:[self psatStep].interStimulusInterval
+                                                                     runtime:-[self psatStep].stimulusDuration
+                                                                     handler:^(ORKActiveStepTimer *timer, BOOL finished) {
+                                                                         typeof(self) strongSelf = weakSelf;
+                                                                         [strongSelf clearDigitsTimerFired];
+                                                                     }];
+        [self.clearDigitsTimer resume];
+    }
+    
+    [super start];
+}
+
+- (void)suspend {
+    [self.clearDigitsTimer pause];
+    [super suspend];
+}
+
+- (void)resume {
+    [self.clearDigitsTimer resume];
+    [super resume];
+}
+
+- (void)finish {
+    [self.clearDigitsTimer reset];
+    self.clearDigitsTimer = nil;
+    [super finish];
+}
+
+- (void)countDownTimerFired:(ORKActiveStepTimer *)timer finished:(BOOL)finished {
+    if (self.currentDigitIndex == 0) {
+        [self.psatContentView setEnabled:YES];
+        [self.activeStepView updateTitle:ORKLocalizedString(@"PSAT_INSTRUCTION", nil) text:nil];
+    } else {
+        [self saveSample];
+    }
+    
+    self.currentDigitIndex++;
+    self.answerStart = CACurrentMediaTime();
+    self.answerEnd = 0;
+    
+    if (self.currentDigitIndex <= [self psatStep].seriesLength) {
+        [self.psatContentView setAddition:self.currentDigitIndex forTotal:[self psatStep].seriesLength withDigit:[self.digits objectAtIndex:self.currentDigitIndex]];
+    }
+    
+    self.currentAnswer = -1;
+    
+    CGFloat progress = finished ? 1 : (timer.runtime / timer.duration);
+    [self.psatContentView setProgress:progress animated:YES];
+    
+    [super countDownTimerFired:timer finished:finished];
+}
+
+- (void)clearDigitsTimerFired {
+    [self.psatContentView setAddition:self.currentDigitIndex forTotal:[self psatStep].seriesLength withDigit:@(-1)];
+}
+
+- (void)saveSample {
+    ORKPSATSample *sample = [[ORKPSATSample alloc] init];
+    NSInteger previousDigit = [(NSNumber *)[self.digits objectAtIndex:self.currentDigitIndex - 1] integerValue];
+    NSInteger currentDigit = [(NSNumber *)[self.digits objectAtIndex:self.currentDigitIndex] integerValue];
+    sample.correct = previousDigit + currentDigit == self.currentAnswer ? YES : NO;
+    sample.digit = currentDigit;
+    sample.answer = self.currentAnswer;
+    sample.time = self.answerEnd == 0 ? [self psatStep].interStimulusInterval : self.answerEnd - self.answerStart;
+    
+    [self.samples addObject:sample];
+}
+
+#pragma mark - keyboard view delegate
+
+- (void)keyboardView:(ORKPSATKeyboardView *)keyboardView didSelectAnswer:(NSInteger)answer {
+    self.currentAnswer = answer;
+    self.answerEnd = CACurrentMediaTime();
+}
+
+@end

ResearchKit/ActiveTasks/ORKReactionTimeViewController.m

@@ -84,10 +84,8 @@ static const NSTimeInterval OutcomeAnimationDuration = 0.3;
 }
 
 #if TARGET_IPHONE_SIMULATOR
-- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event
-{
-    if(event.type == UIEventSubtypeMotionShake)
-    {
+- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event {
+    if (event.type == UIEventSubtypeMotionShake) {
         if (_validResult) {
             ORKReactionTimeResult *reactionTimeResult = [[ORKReactionTimeResult alloc] initWithIdentifier:self.step.identifier];
             reactionTimeResult.timestamp = _stimulusTimestamp;
@@ -147,7 +145,7 @@ static const NSTimeInterval OutcomeAnimationDuration = 0.3;
 
 - (void)configureTitle {
     NSString *format = ORKLocalizedString(@"REACTION_TIME_TASK_ATTEMPTS_FORMAT", nil);
-    NSString *text = [NSString stringWithFormat:format, _results.count + 1, [self reactionTimeStep].numberOfAttempts];
+    NSString *text = [NSString stringWithFormat:format, ORKLocalizedStringFromNumber(@(_results.count + 1)), ORKLocalizedStringFromNumber(@([self reactionTimeStep].numberOfAttempts))];
     [self.activeStepView updateTitle:ORKLocalizedString(@"REACTION_TIME_TASK_ACTIVE_STEP_TITLE", nil) text:text];
 }
 

ResearchKit/ActiveTasks/ORKRecorder.h

@@ -104,7 +104,7 @@ ORK_CLASS_AVAILABLE
  If your recorder requires or would benefit from read access to HealthKit at
  runtime during the task, return the appropriate set of `HKSampleType` objects.
  */
-- (nullable NSSet *)requestedHealthKitTypesForReading;
+- (nullable NSSet<HKObjectType *> *)requestedHealthKitTypesForReading;
 
 @end
 

ResearchKit/ActiveTasks/ORKRecorder.m

@@ -40,12 +40,14 @@
 
 @implementation ORKRecorderConfiguration
 
+- (instancetype)init {
+    ORKThrowMethodUnavailableException();
+}
+
 - (instancetype)initWithIdentifier:(NSString *)identifier {
     self = [super init];
     if (self) {
-        if (nil == identifier) {
-            @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"identifier cannot be nil." userInfo:nil];
-        }
+        ORKThrowInvalidArgumentExceptionIfNil(identifier);
         _identifier = [identifier copy];
     }
     return self;
@@ -82,7 +84,7 @@
     return nil;
 }
 
-- (NSSet *)requestedHealthKitTypesForReading {
+- (NSSet<HKObjectType *> *)requestedHealthKitTypesForReading {
     return nil;
 }
 - (ORKPermissionMask)requestedPermissionMask {
@@ -170,7 +172,7 @@
     if (! _outputDirectory) {
         return nil;
     }
-    return [NSURL fileURLWithPath:[_outputDirectory.path stringByAppendingPathComponent:[NSString stringWithFormat:@"recorder-%@",[_recorderUUID UUIDString]]]];
+    return [NSURL fileURLWithPath:[_outputDirectory.path stringByAppendingPathComponent:[NSString stringWithFormat:@"recorder-%@", _recorderUUID.UUIDString]]];
 }
 
 - (NSString *)recorderType {
@@ -178,7 +180,7 @@
 }
 
 - (NSString *)logName {
-    return [NSString stringWithFormat:@"%@_%@", [self recorderType],self.identifier];
+    return [NSString stringWithFormat:@"%@_%@", [self recorderType], _recorderUUID.UUIDString];
 }
 
 - (ORKDataLogger *)makeJSONDataLoggerWithError:(NSError * __autoreleasing *)error {

ResearchKit/ActiveTasks/ORKSpatialSpanGame.h

@@ -40,6 +40,8 @@
  */
 @interface ORKSpatialSpanGame : NSObject
 
+- (instancetype)init NS_UNAVAILABLE;
+
 /**
  Returns an initialized spatial span game using the specified game size, sequence length, and seed.
  

ResearchKit/ActiveTasks/ORKSpatialSpanGame.m

@@ -30,12 +30,16 @@
 
 
 #import "ORKSpatialSpanGame.h"
-
+#import "ORKHelpers.h"
 
 @implementation ORKSpatialSpanGame {
     NSInteger *_sequence;
 }
 
+- (instancetype)init {
+    ORKThrowMethodUnavailableException();
+}
+
 - (void)generateSequence {
     _sequence = calloc(_gameSize, sizeof(NSInteger));
     if (_sequence == NULL) {

ResearchKit/ActiveTasks/ORKSpatialSpanGameState.h

@@ -45,6 +45,8 @@ typedef NS_ENUM(NSInteger, ORKSpatialSpanResult) {
 
 @interface ORKSpatialSpanGameState : NSObject
 
+- (instancetype)init NS_UNAVAILABLE;
+
 - (instancetype)initWithGame:(ORKSpatialSpanGame *)game NS_DESIGNATED_INITIALIZER;
 
 @property (nonatomic, strong, readonly, nullable) ORKSpatialSpanGame *game;

ResearchKit/ActiveTasks/ORKSpatialSpanGameState.m

@@ -31,6 +31,7 @@
 
 #import "ORKSpatialSpanGameState.h"
 #import "ORKSpatialSpanGame.h"
+#import "ORKHelpers.h"
 
 
 @implementation ORKSpatialSpanGameState {
@@ -38,6 +39,10 @@
     ORKSpatialSpanTargetState *_states;
 }
 
+- (instancetype)init {
+    ORKThrowMethodUnavailableException();
+}
+
 - (instancetype)initWithGame:(ORKSpatialSpanGame *)game {
     self = [super init];
     if (self) {

ResearchKit/ActiveTasks/ORKSpatialSpanMemoryContentView.m

@@ -258,13 +258,19 @@
     [self updateFooterHidden];
 }
 
-
 - (void)updateMargins {
-    self.layoutMargins = (UIEdgeInsets){.left=ORKStandardHorizMarginForView(self), .right=ORKStandardHorizMarginForView(self)};
+    CGFloat margin = ORKStandardHorizontalMarginForView(self);
+    self.layoutMargins = (UIEdgeInsets){.left = margin, .right = margin};
     _quantityPairView.layoutMargins = self.layoutMargins;
 }
 
-- (void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection {
+- (void)setFrame:(CGRect)frame {
+    [super setFrame:frame];
+    [self updateMargins];
+}
+
+- (void)setBounds:(CGRect)bounds {
+    [super setBounds:bounds];
     [self updateMargins];
 }
 

ResearchKit/ActiveTasks/ORKTappingContentView.m

@@ -55,6 +55,7 @@
     NSArray *_constraints;
     ORKScreenType _screenType;
     UIView *_buttonContainer;
+    NSNumberFormatter *_formatter;
 }
 
 - (instancetype)init {
@@ -116,7 +117,12 @@
 }
 
 - (void)setTapCount:(NSUInteger)tapCount {
-    _tapCountLabel.text = [NSString stringWithFormat:@"%02lu", (unsigned long)tapCount];
+    if (_formatter == nil) {
+        _formatter = [NSNumberFormatter new];
+        _formatter.locale = [NSLocale currentLocale];
+        _formatter.minimumIntegerDigits = 2;
+    }
+    _tapCountLabel.text = [_formatter stringFromNumber:@(tapCount)];
 }
 
 - (void)setProgress:(CGFloat)progress animated:(BOOL)animated {
@@ -141,10 +147,25 @@
 
 - (void)willMoveToWindow:(UIWindow *)newWindow {
     [super willMoveToWindow:newWindow];
-    _screenType = ORKGetScreenTypeForWindow(newWindow);
+    _screenType = ORKGetVerticalScreenTypeForWindow(newWindow);
     [self setNeedsUpdateConstraints];
 }
 
+- (void)updateLayoutMargins {
+    CGFloat margin = ORKStandardHorizontalMarginForView(self);
+    self.layoutMargins = (UIEdgeInsets) { .left=margin*2, .right=margin*2 };
+}
+
+- (void)setFrame:(CGRect)frame {
+    [super setFrame:frame];
+    [self updateLayoutMargins];
+}
+
+- (void)setBounds:(CGRect)bounds {
+    [super setBounds:bounds];
+    [self updateLayoutMargins];
+}
+
 - (void)updateConstraints {
     if ([_constraints count]) {
         [NSLayoutConstraint deactivateConstraints:_constraints];
@@ -154,8 +175,6 @@
     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 CaptionBaselineToTapCountBaseline = 56;
     static const CGFloat TapButtonBottomToBottom = 36;

ResearchKit/ActiveTasks/ORKTimedWalkContentView.h

@@ -0,0 +1,43 @@
+/*
+ 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"
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ORKTimedWalkContentView : ORKActiveStepCustomView
+
+@property (nonatomic, strong, nullable) UIImage *image;
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKTimedWalkContentView.m

@@ -0,0 +1,119 @@
+/*
+ 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 "ORKTimedWalkContentView.h"
+#import "ORKSkin.h"
+#import "ORKProgressView.h"
+#import "ORKActiveStepQuantityView.h"
+#import "ORKTintedImageView.h"
+
+
+@interface ORKTimedWalkContentView ()
+
+@property (nonatomic, strong) ORKProgressView *progressView;
+@property (nonatomic, strong) ORKTintedImageView *imageView;
+@property (nonatomic, strong) NSLayoutConstraint *imageRatioConstraint;
+@property (nonatomic, copy) NSArray *constraints;
+
+@end
+
+
+@implementation ORKTimedWalkContentView
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        _progressView = [ORKProgressView new];
+        _progressView.translatesAutoresizingMaskIntoConstraints = NO;
+        [self addSubview:_progressView];
+        
+        _imageView = [ORKTintedImageView new];
+        _imageView.contentMode = UIViewContentModeScaleAspectFit;
+        _imageView.translatesAutoresizingMaskIntoConstraints = NO;
+        _imageView.shouldApplyTint = YES;
+        _imageView.isAccessibilityElement = NO;
+        [self addSubview:_imageView];
+        
+        self.translatesAutoresizingMaskIntoConstraints = NO;
+        
+        [self setNeedsUpdateConstraints];
+    }
+    
+    return self;
+}
+
+- (void)setImage:(UIImage *)image {
+    _image = image;
+    self.imageView.image = image;
+    
+    self.imageRatioConstraint.active = NO;
+    
+    CGSize size = image.size;
+    if (size.width > 0 && size.height > 0) {
+        self.imageRatioConstraint = [NSLayoutConstraint constraintWithItem:_imageView
+                                                                 attribute:NSLayoutAttributeHeight
+                                                                 relatedBy:NSLayoutRelationEqual
+                                                                    toItem:_imageView
+                                                                 attribute:NSLayoutAttributeWidth
+                                                                multiplier:size.height/size.width
+                                                                  constant:0];
+        self.imageRatioConstraint.active = YES;
+    }
+}
+
+- (void)updateConstraints {
+    if ([self.constraints count]) {
+        [NSLayoutConstraint deactivateConstraints:self.constraints];
+        self.constraints = nil;
+    }
+    
+    NSMutableArray *constraintsArray = [NSMutableArray array];
+    
+    NSDictionary *views = NSDictionaryOfVariableBindings(_progressView, _imageView);
+    
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_progressView]|"
+                                             options:(NSLayoutFormatOptions)0
+                                             metrics:nil views:views]];
+    
+    [constraintsArray addObjectsFromArray:
+     [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[_progressView]-(>=10)-[_imageView]-|"
+                                             options:NSLayoutFormatAlignAllCenterX
+                                             metrics:nil views:views]];
+    
+    self.constraints = constraintsArray;
+    [self addConstraints:self.constraints];
+    
+    [NSLayoutConstraint activateConstraints:self.constraints];
+    [super updateConstraints];
+}
+
+@end

ResearchKit/ActiveTasks/ORKTimedWalkStep.h

@@ -0,0 +1,44 @@
+/*
+ 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 <ResearchKit/ResearchKit_Private.h>
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+ORK_CLASS_AVAILABLE
+@interface ORKTimedWalkStep : ORKActiveStep
+
+@property (nonatomic, assign) double distanceInMeters;
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKTimedWalkStep.m

@@ -0,0 +1,77 @@
+/*
+ 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 "ORKTimedWalkStep.h"
+#import "ORKTimedWalkStepViewController.h"
+
+
+@implementation ORKTimedWalkStep
+
++ (Class)stepViewControllerClass {
+    return [ORKTimedWalkStepViewController class];
+}
+
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    self = [super initWithIdentifier:identifier];
+    if (self) {
+        self.shouldStartTimerAutomatically = YES;
+        self.shouldShowDefaultTimer = NO;
+        self.shouldPlaySoundOnStart = YES;
+        self.shouldPlaySoundOnFinish = YES;
+        self.shouldVibrateOnStart = YES;
+        self.shouldVibrateOnFinish = YES;
+    }
+    return self;
+}
+
+- (void)validateParameters {
+    [super validateParameters];
+    
+    double const ORKTimedWalkMinimumDistanceInMeters = 1.0;
+    double const ORKTimedWalkMaximumDistanceInMeters = 10000.0;
+    
+    NSTimeInterval const ORKTimedWalkMinimumDuration = 1.0;
+    
+    if (self.distanceInMeters < ORKTimedWalkMinimumDistanceInMeters ||
+        self.distanceInMeters > ORKTimedWalkMaximumDistanceInMeters) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"timed walk distance must be greater than or equal to %@ meters and less than or equal to %@ meters.", @(ORKTimedWalkMinimumDistanceInMeters), @(ORKTimedWalkMaximumDistanceInMeters)] userInfo:nil];
+    }
+    
+    if (self.stepDuration < ORKTimedWalkMinimumDuration) {
+        @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"duration can not be shorter than %@ seconds.", @(ORKTimedWalkMinimumDuration)] userInfo:nil];
+    }
+}
+
+- (BOOL)allowsBackNavigation {
+    return NO;
+}
+
+@end

ResearchKit/ActiveTasks/ORKTimedWalkStepViewController.h

@@ -0,0 +1,42 @@
+/*
+ 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 <ResearchKit/ResearchKit_Private.h>
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+ORK_CLASS_AVAILABLE
+@interface ORKTimedWalkStepViewController : ORKActiveStepViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKTimedWalkStepViewController.m

@@ -0,0 +1,116 @@
+/*
+ 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 "ORKTimedWalkStepViewController.h"
+#import "ORKTimedWalkContentView.h"
+#import "ORKTimedWalkStep.h"
+#import "ORKActiveStepViewController_Internal.h"
+#import "ORKNavigationContainerView_Internal.h"
+#import "ORKStepViewController_Internal.h"
+#import "ORKActiveStepView.h"
+
+
+double const kDistanceInMetersTrackingThreshold = 100.0;
+
+
+@interface ORKTimedWalkStepViewController ()
+
+@property (nonatomic, strong) NSMutableArray *samples;
+@property (nonatomic, strong) ORKTimedWalkContentView *timedWalkContentView;
+@property (nonatomic, assign) NSTimeInterval trialDuration;
+
+@end
+
+
+@implementation ORKTimedWalkStepViewController
+
+- (instancetype)initWithStep:(ORKStep *)step {
+    self = [super initWithStep:step];
+    
+    if (self) {
+        self.suspendIfInactive = YES;
+    }
+    
+    return self;
+}
+
+- (ORKTimedWalkStep *)timedWalkStep {
+    return (ORKTimedWalkStep *)self.step;
+}
+
+- (void)initializeInternalButtonItems {
+    [super initializeInternalButtonItems];
+    
+    self.internalDoneButtonItem = nil;
+    self.continueButtonTitle = ORKLocalizedString(@"BUTTON_DONE", nil);
+}
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.timedWalkContentView = [ORKTimedWalkContentView new];
+    self.timedWalkContentView.image = [self timedWalkStep].image;
+    self.activeStepView.activeCustomView = self.timedWalkContentView;
+    self.activeStepView.stepViewFillsAvailableSpace = YES;
+    self.activeStepView.continueSkipContainer.continueEnabled = YES;
+    
+    self.timerUpdateInterval = 0.1f;
+}
+
+- (void)finish {
+    [super finish];
+    
+    [self goForward];
+}
+
+- (void)countDownTimerFired:(ORKActiveStepTimer *)timer finished:(BOOL)finished {
+    self.trialDuration = timer.runtime;
+    [super countDownTimerFired:timer finished:finished];
+}
+
+- (ORKStepResult *)result {
+    ORKStepResult *sResult = [super result];
+    
+    NSMutableArray *results = [NSMutableArray arrayWithArray:sResult.results];
+    
+    ORKTimedWalkResult *timedWalkResult = [[ORKTimedWalkResult alloc] initWithIdentifier:(NSString *__nonnull)self.step.identifier];
+    timedWalkResult.distanceInMeters = [self timedWalkStep].distanceInMeters;
+    timedWalkResult.timeLimit = [self timedWalkStep].stepDuration;
+    timedWalkResult.duration = self.trialDuration;
+    
+    [results addObject:timedWalkResult];
+    
+    sResult.results = [results copy];
+    
+    return sResult;
+}
+
+@end

ResearchKit/ActiveTasks/ORKToneAudiometryContentView.m

@@ -51,7 +51,7 @@
     self = [super init];
     if (self) {
 
-        _screenType = ORKGetScreenTypeForWindow(self.window);
+        _screenType = ORKGetVerticalScreenTypeForWindow(self.window);
         _captionLabel = [ORKUnitLabel new];
         _captionLabel.textAlignment = NSTextAlignmentCenter;
         _captionLabel.translatesAutoresizingMaskIntoConstraints = NO;
@@ -101,12 +101,25 @@
     self.tapButton.enabled = NO;
 }
 
+- (void)updateLayoutMargins {
+    CGFloat margin = ORKStandardHorizontalMarginForView(self);
+    self.layoutMargins = (UIEdgeInsets) { .left=margin*2, .right=margin*2 };
+}
+
+- (void)setFrame:(CGRect)frame {
+    [super setFrame:frame];
+    [self updateLayoutMargins];
+}
+
+- (void)setBounds:(CGRect)bounds {
+    [super setBounds:bounds];
+    [self updateLayoutMargins];
+}
+
 - (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;
 

ResearchKit/ActiveTasks/ORKToneAudiometryStepViewController.m

@@ -159,9 +159,9 @@
     ORKToneAudiometrySample *sample = [ORKToneAudiometrySample new];
     NSUInteger frequencyIndex = (self.currentTestIndex / 2);
     NSNumber *frequency = self.testingFrequencies[frequencyIndex];
-    sample.frequency = frequency;
+    sample.frequency = [frequency doubleValue];
     sample.channel = ((self.currentTestIndex % 2) == 0) ? ORKAudioChannelLeft : ORKAudioChannelRight;
-    sample.amplitude = @(self.audioGenerator.volumeAmplitude);
+    sample.amplitude = self.audioGenerator.volumeAmplitude;
 
     [self.samples addObject:sample];
 
@@ -202,7 +202,7 @@
 
     CGFloat progress = 0.001 + (CGFloat)testIndex / (self.testingFrequencies.count * 2);
     [self.toneAudiometryContentView setProgress:progress
-                                        caption:(channel == ORKAudioChannelLeft) ? [NSString stringWithFormat:ORKLocalizedString(@"TONE_LABEL_%@_LEFT", nil), frequency] : [NSString stringWithFormat:ORKLocalizedString(@"TONE_LABEL_%@_RIGHT", nil), frequency]
+                                        caption:(channel == ORKAudioChannelLeft) ? [NSString stringWithFormat:ORKLocalizedString(@"TONE_LABEL_%@_LEFT", nil), ORKLocalizedStringFromNumber(frequency)] : [NSString stringWithFormat:ORKLocalizedString(@"TONE_LABEL_%@_RIGHT", nil), ORKLocalizedStringFromNumber(frequency)]
                                        animated:YES];
 
     [self.audioGenerator playSoundAtFrequency:frequency.doubleValue

ResearchKit/ActiveTasks/ORKTouchRecorder.m

@@ -80,7 +80,7 @@
 
 @interface ORKTouchRecordingView : UIView
 
-@property (nonatomic, weak) id<ORKTouchRecordingDelegate> deleagte;
+@property (nonatomic, weak) id<ORKTouchRecordingDelegate> delegate;
 
 @end
 

ResearchKit/ActiveTasks/ORKTowerOfHanoiStep.h

@@ -0,0 +1,49 @@
+/*
+ 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 ORKTowerOfHanoiStep : ORKActiveStep
+
+/**
+ The number of disks in the puzzle.
+ It is not recommended that you use a large number of disks. As this provides a poor user experience.
+ The default value of this property is 3.
+ */
+@property (nonatomic, assign) NSUInteger numberOfDisks;
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKTowerOfHanoiStep.m

@@ -0,0 +1,115 @@
+/*
+ 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 "ORKTowerOfHanoiStep.h"
+#import "ORKTowerOfHanoiStepViewController.h"
+#import "ORKHelpers.h"
+
+static const NSUInteger kMaximumNumberOfDisks = 8;
+
+@implementation ORKTowerOfHanoiStep
+
++ (Class)stepViewControllerClass {
+    return [ORKTowerOfHanoiViewController class];
+}
+
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+    self = [super initWithIdentifier:identifier];
+    if (self) {
+        [self commonInit];
+    }
+    return self;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        [self commonInit];
+    }
+    return self;
+}
+
+- (void)commonInit {
+    self.optional = YES;
+    self.numberOfDisks = 3;
+}
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+    self = [super initWithCoder:aDecoder];
+    if (self) {
+        ORK_DECODE_INTEGER(aDecoder, numberOfDisks);
+    }
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)aCoder {
+    [super encodeWithCoder:aCoder];
+    ORK_ENCODE_INTEGER(aCoder, numberOfDisks);
+}
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    ORKTowerOfHanoiStep *step = [super copyWithZone:zone];
+    step.numberOfDisks = self.numberOfDisks;
+    return step;
+}
+
+- (BOOL)isEqual:(id)object {
+    BOOL isParentSame = [super isEqual:object];
+    
+    __typeof(self) castObject = object;
+    return (isParentSame &&
+            (self.numberOfDisks == castObject.numberOfDisks));
+}
+
+- (void)validateParameters {
+    [super validateParameters];
+    if (self.numberOfDisks > kMaximumNumberOfDisks) {
+        ORK_Log_Oops(@"Having a large number of disks provides a poor user experience, consider reducing the number below %@.", @(kMaximumNumberOfDisks));
+    }
+}
+
+- (BOOL)allowsBackNavigation {
+    return NO;
+}
+
+- (BOOL)startsFinished {
+    return NO;
+}
+
+- (BOOL)shouldContinueOnFinish {
+    return YES;
+}
+
+@end

ResearchKit/ActiveTasks/ORKTowerOfHanoiStepViewController.h

@@ -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 ORKTowerOfHanoiViewController : ORKActiveStepViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/ActiveTasks/ORKTowerOfHanoiStepViewController.m

@@ -0,0 +1,295 @@
+/*
+ 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 "ORKTowerOfHanoiStepViewController.h"
+#import "ORKActiveStepViewController_Internal.h"
+#import "ORKTowerOfHanoiTowerView.h"
+#import "ORKActiveStepView.h"
+#import "ORKTowerOfHanoiTower.h"
+#import "ORKTowerOfHanoiStep.h"
+#import "ORKSkin.h"
+
+static const NSUInteger kNumberOfTowers = 3;
+
+@interface ORKTowerOfHanoiViewController () <ORKTowerOfHanoiTowerViewDataSource, ORKTowerOfHanoiTowerViewDelegate>
+
+@property (nonatomic, strong) NSDateComponentsFormatter *dateComponentsFormatter;
+@property (nonatomic, strong) NSMutableArray *moves;
+
+@end
+
+@implementation ORKTowerOfHanoiViewController {
+    ORKActiveStepCustomView *_towerOfHanoiCustomView;
+    NSNumber *_selectedIndex;
+    NSArray *_currentConstraints;
+    NSMutableArray *_towers;
+    NSArray *_towerViews;
+    NSTimer *_timer;
+    NSInteger _secondsElapsed;
+    NSDate *_firstMoveDate;
+}
+
+#pragma mark - UIViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    _towerOfHanoiCustomView = [ORKActiveStepCustomView new];
+    [_towerOfHanoiCustomView setTranslatesAutoresizingMaskIntoConstraints:NO];
+    self.activeStepView.activeCustomView = _towerOfHanoiCustomView;
+    self.activeStepView.minimumStepHeaderHeight = ORKGetMetricForWindow(ORKScreenMetricMinimumStepHeaderHeightForTowerOfHanoiPuzzle, self.view.window);
+    
+    [self setupTowers];
+    [self setupTowerViews];
+    [self reloadData];
+    NSString *title = ORKLocalizedString(@"TOWER_OF_HANOI_TASK_ACTIVE_STEP_INTRO_TEXT",nil);
+    NSString *text = ORKLocalizedString(@"TOWER_OF_HANOI_TASK_INTRO_TEXT",nil);
+    NSString *skip = ORKLocalizedString(@"TOWER_OF_HANOI_TASK_ACTIVE_STEP_SKIP_BUTTON_TITLE", nil);
+    [self.activeStepView updateTitle:title text:text];
+    [self setSkipButtonTitle:skip];
+}
+
+- (void)viewWillDisappear:(BOOL)animated {
+    [super viewWillDisappear:animated];
+    [_timer invalidate];
+}
+
+- (void)updateViewConstraints {
+    [super updateViewConstraints];
+    if (_currentConstraints) {
+        [NSLayoutConstraint deactivateConstraints:_currentConstraints];
+        _currentConstraints = nil;
+    }
+    BOOL needCompactLayout = self.traitCollection.horizontalSizeClass == UIUserInterfaceSizeClassCompact &&
+    self.traitCollection.verticalSizeClass != UIUserInterfaceSizeClassCompact;
+    _currentConstraints = needCompactLayout ? [self compactConstraints] : [self regularConstraints];
+    [NSLayoutConstraint activateConstraints:_currentConstraints];
+}
+
+#pragma mark - ORKStepViewController
+
+- (void)skipForward {
+    [self finish];
+}
+
+#pragma mark - ORKActiveTaskViewController
+
+- (ORKResult *)result {
+    ORKStepResult *stepResult = [super result];
+    ORKTowerOfHanoiResult *result = [[ORKTowerOfHanoiResult alloc] initWithIdentifier:self.step.identifier];
+    result.moves = self.moves;
+    result.puzzleWasSolved = [self puzzleIsSolved];
+    if (_firstMoveDate != nil) {
+        result.startDate = _firstMoveDate;
+    }
+    stepResult.results = @[result];
+    return stepResult;
+}
+
+#pragma mark - ORKTowerOfHanoiTowerViewDataSource
+ 
+- (NSUInteger)numberOfDisksInTowerOfHanoiView:(ORKTowerOfHanoiTowerView *)towerView {
+    NSInteger towerIndex = [_towerViews indexOfObject:towerView];
+    ORKTowerOfHanoiTower *tower = _towers[towerIndex];
+    return tower.disks.count;
+}
+ 
+- (NSNumber *)towerOfHanoiView:(ORKTowerOfHanoiTowerView *)towerView diskAtIndex:(NSUInteger)index {
+    NSInteger towerIndex = [_towerViews indexOfObject:towerView];
+    ORKTowerOfHanoiTower *tower = _towers[towerIndex];
+    return (index >= tower.disks.count) ? nil :tower.disks[index];
+}
+
+#pragma mark - ORKTowerOfHanoiTowerViewDelegate
+
+- (void)towerOfHanoiTowerViewWasSelected:(ORKTowerOfHanoiTowerView *)towerView {
+    NSInteger newSelectedIndex = [_towerViews indexOfObject:towerView];
+    if (_selectedIndex == nil) {
+        _selectedIndex = @(newSelectedIndex);
+    }
+    else if ([_selectedIndex isEqual:@(newSelectedIndex)]) {
+        _selectedIndex = nil;
+    } else {
+        [self transferDiskFromTowerAtIndex:_selectedIndex.integerValue toTowerAtIndex:newSelectedIndex];
+    }
+    [self reloadData];
+    [self evaluatePuzzle];
+}
+
+- (ORKTowerOfHanoiTowerView *)towerOfHanoiHighlightedTowerView {
+    return (_selectedIndex != nil ? _towerViews[_selectedIndex.integerValue] : nil);
+}
+
+#pragma mark - ORKTowerOfHanoiViewController
+
+- (NSMutableArray *)moves {
+    if (_moves == nil) {
+        _moves = [NSMutableArray array];
+    }
+    return _moves;
+}
+
+- (NSDateComponentsFormatter *)dateComponentsFormatter {
+    if (_dateComponentsFormatter == nil) {
+        _dateComponentsFormatter = [NSDateComponentsFormatter new];
+        _dateComponentsFormatter.unitsStyle = NSDateComponentsFormatterUnitsStylePositional;
+        _dateComponentsFormatter.zeroFormattingBehavior = NSDateComponentsFormatterZeroFormattingBehaviorPad;
+        _dateComponentsFormatter.allowedUnits =  NSCalendarUnitMinute | NSCalendarUnitSecond;
+    }
+    return _dateComponentsFormatter;
+}
+
+- (NSUInteger)numberOfDisks {
+    return ((ORKTowerOfHanoiStep *)self.step).numberOfDisks;
+}
+
+- (void)updateTitleText {
+    NSString *moves = ORKLocalizedStringFromNumber(@(self.moves.count));
+    NSString *time = [self.dateComponentsFormatter stringFromTimeInterval:_secondsElapsed];
+    NSString *title = ORKLocalizedString(@"TOWER_OF_HANOI_TASK_ACTIVE_STEP_INTRO_TEXT",nil);
+    NSString *text = [NSString stringWithFormat:ORKLocalizedString(@"TOWER_OF_HANOI_TASK_ACTIVE_STEP_PROGRESS_TEXT", nil), moves, time];
+    [self.activeStepView updateTitle:title text:text];
+}
+
+- (void)reloadData {
+    for (ORKTowerOfHanoiTowerView *towerView in _towerViews) {
+        towerView.highlighted = _selectedIndex != nil && [_towerViews indexOfObject:towerView] == _selectedIndex.integerValue;
+        [towerView reloadData];
+    }
+}
+
+- (BOOL)puzzleIsSolved {
+    return ((ORKTowerOfHanoiTower *)_towers.lastObject).disks.count == [self numberOfDisks];
+}
+
+- (void)evaluatePuzzle {
+    if ([self puzzleIsSolved]) {
+        [self finish];
+    }
+}
+
+- (void)setupTowers {
+    NSMutableArray *diskStack = [NSMutableArray array];
+    for (NSInteger disk = [self numberOfDisks] ; disk > 0 ; disk--) {
+        [diskStack addObject: @(disk)];
+    }
+    _towers = [@[[[ORKTowerOfHanoiTower alloc] initWithDisks:diskStack], [ORKTowerOfHanoiTower emptyTower], [ORKTowerOfHanoiTower emptyTower]] mutableCopy];
+}
+
+- (void)setupTowerViews {
+    NSMutableArray *towerViews = [NSMutableArray array];
+    for (NSInteger index = 0 ; index < 3 ; index++) {
+        ORKTowerOfHanoiTowerView *towerView = [[ORKTowerOfHanoiTowerView alloc] initWithFrame:CGRectZero maximumNumberOfDisks:[self numberOfDisks]];
+        towerView.delegate = self;
+        towerView.dataSource = self;
+        towerView.targeted = (index == kNumberOfTowers - 1);
+        [towerViews addObject:towerView];
+        [towerView setTranslatesAutoresizingMaskIntoConstraints:NO];
+        [_towerOfHanoiCustomView addSubview:towerView];
+    }
+    _towerViews = towerViews;
+}
+
+- (void)transferDiskFromTowerAtIndex:(NSInteger)donorTowerIndex toTowerAtIndex:(NSInteger)recipientTowerIndex {
+    ORKTowerOfHanoiTower *donorTower = _towers[donorTowerIndex];
+    ORKTowerOfHanoiTower *recipientTower = _towers[recipientTowerIndex];
+    if ([recipientTower recieveDiskFrom:donorTower]) {
+        [self makeMoveFromTowerAtIndex:donorTowerIndex toTowerAtIndex:recipientTowerIndex];
+    }
+    else {
+        NSNumber *donorSize = [self towerOfHanoiView:_towerViews[donorTowerIndex] diskAtIndex:0];
+        NSNumber *recipientSize = [self towerOfHanoiView:_towerViews[recipientTowerIndex] diskAtIndex:0];
+        
+        if (donorSize && recipientSize) {
+            // Only announce if the both donor and recipient are valid
+            NSString *invalidMoveAnnouncement = [NSString stringWithFormat:ORKLocalizedString(@"AX_TOWER_OF_HANOI_INVALID_MOVE_FORMAT", nil), donorSize.stringValue, recipientSize.stringValue];
+            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 1 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
+                UIAccessibilityPostNotification(UIAccessibilityAnnouncementNotification, invalidMoveAnnouncement);
+            });
+        }
+    }
+}
+
+- (void)makeMoveFromTowerAtIndex:(NSUInteger)donorTowerIndex toTowerAtIndex:(NSUInteger)recipientTowerIndex {
+    ORKTowerOfHanoiMove *move = [[ORKTowerOfHanoiMove alloc] init];
+    move.donorTowerIndex = donorTowerIndex;
+    move.recipientTowerIndex = recipientTowerIndex;
+    move.timestamp = (self.moves.count == 0) ? 0 : fabs([_firstMoveDate timeIntervalSinceNow]);
+    [_moves addObject:move];
+    [self didMakeMove];
+}
+
+- (void)didMakeMove {
+    _selectedIndex = nil;
+    if (self.moves.count == 1) {
+        _firstMoveDate = [NSDate date];
+        _timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timerTicked) userInfo:nil repeats:YES];
+    }
+    [self updateTitleText];
+}
+
+- (void)timerTicked {
+    _secondsElapsed++;
+    [self updateTitleText];
+}
+
+- (NSArray *)compactConstraints {
+    CGFloat compactWidth = ([[UIScreen mainScreen]bounds].size.height - (3 * 8)) / 3;
+    NSDictionary *views = @{ @"A" : _towerViews[0], @"B" : _towerViews[1], @"C" : _towerViews[2]};
+    NSMutableArray *newConstraints = [NSMutableArray new];
+
+    [newConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"V:|-[A]-[B]-[C]-|"] options:0 metrics:nil views:views]];
+    [newConstraints addObject:[NSLayoutConstraint constraintWithItem:_towerViews[0] attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:_towerViews[1] attribute:NSLayoutAttributeHeight multiplier:1 constant:0]];
+    [newConstraints addObject:[NSLayoutConstraint constraintWithItem:_towerViews[2] attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:_towerViews[1] attribute:NSLayoutAttributeHeight multiplier:1 constant:0]];
+    
+    for (int index = 0 ; index < _towerViews.count ; index++) {
+        [newConstraints addObject:[NSLayoutConstraint constraintWithItem:_towerViews[index] attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:compactWidth]];
+        [newConstraints addObject:[NSLayoutConstraint constraintWithItem:_towerViews[index] attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:_towerOfHanoiCustomView attribute:NSLayoutAttributeCenterX multiplier:1 constant:0]];
+    }
+
+    return newConstraints;
+}
+
+- (NSArray *)regularConstraints {
+    NSDictionary *views = @{ @"A" : _towerViews[0], @"B" : _towerViews[1], @"C" : _towerViews[2]};
+    NSMutableArray *newConstraints = [NSMutableArray new];
+    
+    [newConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[A]-|" options:0 metrics:nil views:views]];
+    [newConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[B]-|" options:0 metrics:nil views:views]];
+    [newConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[C]-|" options:0 metrics:nil views:views]];
+    [newConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[A]-[B]-[C]-|" options:0 metrics:nil views:views]];
+    
+    [newConstraints addObject:[NSLayoutConstraint constraintWithItem:_towerViews[0] attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:_towerViews[1] attribute:NSLayoutAttributeWidth multiplier:1 constant:0]];
+    [newConstraints addObject:[NSLayoutConstraint constraintWithItem:_towerViews[2] attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:_towerViews[1] attribute:NSLayoutAttributeWidth multiplier:1 constant:0]];
+    
+    return newConstraints;
+}
+
+@end

ResearchKit/ActiveTasks/ORKTowerOfHanoiTower.h

@@ -0,0 +1,44 @@
+/*
+ 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 <Foundation/Foundation.h>
+
+@interface ORKTowerOfHanoiTower : NSObject
+
+@property(nonatomic, copy, readonly) NSArray *disks;
+
++ (instancetype)emptyTower;
+
+- (instancetype)initWithDisks:(NSArray *)disks;
+
+- (BOOL)recieveDiskFrom:(ORKTowerOfHanoiTower *)donorTower;
+
+@end

ResearchKit/ActiveTasks/ORKTowerOfHanoiTower.m

@@ -0,0 +1,72 @@
+/*
+ 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 "ORKTowerOfHanoiTower.h"
+
+@interface ORKTowerOfHanoiTower ()
+
+@property(nonatomic, copy, readwrite) NSArray *disks;
+
+@end
+
+@implementation ORKTowerOfHanoiTower
+
++ (instancetype)emptyTower {
+    return [[ORKTowerOfHanoiTower alloc]initWithDisks:@[]];
+}
+
+- (instancetype)initWithDisks:(NSArray *)disks {
+    self = [super init];
+    if (self) {
+        _disks = disks;
+    }
+    return self;
+}
+
+- (BOOL)canRecieveDisk:(NSNumber *)disk {
+    return _disks.count == 0 || [_disks.lastObject integerValue] > disk.integerValue;
+}
+
+- (BOOL)recieveDiskFrom:(ORKTowerOfHanoiTower*)donorTower {
+    if (donorTower.disks.count == 0  || ![self canRecieveDisk:donorTower.disks.lastObject]) {
+        return NO;
+    }
+    NSMutableArray *recipientDisks = [self.disks mutableCopy];
+    NSMutableArray *donorDisks = [donorTower.disks mutableCopy];
+    [recipientDisks addObject:donorTower.disks.lastObject];
+    [donorDisks removeLastObject];
+    self.disks = recipientDisks;
+    donorTower.disks = donorDisks;
+    
+    return YES;
+}
+
+@end

ResearchKit/ActiveTasks/ORKTowerOfHanoiTowerView.h

@@ -0,0 +1,64 @@
+/*
+ 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 <UIKit/UIKit.h>
+
+@class ORKTowerOfHanoiTowerView;
+
+@protocol ORKTowerOfHanoiTowerViewDataSource <NSObject>
+
+@required
+- (NSUInteger)numberOfDisksInTowerOfHanoiView:(ORKTowerOfHanoiTowerView *)towerView;
+- (NSNumber *)towerOfHanoiView:(ORKTowerOfHanoiTowerView *)towerView diskAtIndex:(NSUInteger)index;
+
+@end
+
+@protocol ORKTowerOfHanoiTowerViewDelegate <NSObject>
+
+@required
+- (void)towerOfHanoiTowerViewWasSelected:(ORKTowerOfHanoiTowerView *)towerView;
+- (ORKTowerOfHanoiTowerView *)towerOfHanoiHighlightedTowerView;
+
+@end
+
+
+@interface ORKTowerOfHanoiTowerView : UIView
+
+@property (nonatomic, getter=isHighLighted) BOOL highlighted;
+@property (nonatomic, getter=isTargeted) BOOL targeted;
+@property (nonatomic, weak) id <ORKTowerOfHanoiTowerViewDataSource> dataSource;
+@property (nonatomic, weak) id <ORKTowerOfHanoiTowerViewDelegate> delegate;
+
+- (instancetype)initWithFrame:(CGRect)frame maximumNumberOfDisks:(NSUInteger)maximumNumberOfDisks;
+
+- (void)reloadData;
+
+@end

ResearchKit/ActiveTasks/ORKTowerOfHanoiTowerView.m

@@ -0,0 +1,276 @@
+/*
+ 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 "ORKTowerOfHanoiTowerView.h"
+#import "ORKActiveStepView.h"
+#import "ORKSkin.h"
+#import "ORKAccessibility.h"
+#import "ORKHelpers.h"
+
+
+static const CGFloat DiskHeight = 10;
+static const CGFloat DiskSpacing = 8;
+static const CGFloat BaseSpacing = 10;
+
+@implementation ORKTowerOfHanoiTowerView {
+    NSInteger _maximumNumberOfDisks;
+    UIView *_base;
+    NSMutableArray *_diskViews;
+    NSMutableArray *_diskSizes;
+    NSMutableArray *_variableConstraints;
+}
+
+#pragma mark - Init
+
+- (instancetype)initWithFrame:(CGRect)frame maximumNumberOfDisks:(NSUInteger)maximumNumberOfDisks {
+    self = [super initWithFrame:frame];
+    if (self) {
+        _maximumNumberOfDisks = maximumNumberOfDisks;
+        _base = [[UIView alloc] initWithFrame:CGRectZero];
+        _base.backgroundColor = [UIColor ork_midGrayTintColor];
+        [_base setTranslatesAutoresizingMaskIntoConstraints:NO];
+        _base.layer.cornerRadius = 2.5;
+        _base.layer.masksToBounds = YES;
+        _diskViews = [NSMutableArray new];
+        _diskSizes = [NSMutableArray new];
+        [self addSubview:_base];
+        [self addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(userDidTapTower)]];
+    }
+    return self;
+}
+
+#pragma mark - UIView
+
+- (void)updateConstraints {
+    [NSLayoutConstraint deactivateConstraints:_variableConstraints];
+    [_variableConstraints removeAllObjects];
+    
+    if (!_variableConstraints) {
+        _variableConstraints = [NSMutableArray new];
+    }
+    
+    CGFloat height = (DiskHeight * _maximumNumberOfDisks) + (DiskSpacing * _maximumNumberOfDisks);
+    
+    [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:self
+                                                                 attribute:NSLayoutAttributeHeight
+                                                                 relatedBy:NSLayoutRelationGreaterThanOrEqual
+                                                                    toItem:nil
+                                                                 attribute:NSLayoutAttributeNotAnAttribute
+                                                                multiplier:1.0
+                                                                  constant:height + BaseSpacing]];
+    
+    [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:_base
+                                                                 attribute:NSLayoutAttributeWidth
+                                                                 relatedBy:NSLayoutRelationEqual
+                                                                    toItem:self
+                                                                 attribute:NSLayoutAttributeWidth
+                                                                multiplier:1.0
+                                                                  constant:0.0]];
+    
+    [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:_base
+                                                                 attribute:NSLayoutAttributeHeight
+                                                                 relatedBy:NSLayoutRelationEqual
+                                                                    toItem:nil
+                                                                 attribute:NSLayoutAttributeNotAnAttribute
+                                                                multiplier:1.0
+                                                                  constant:2]];
+    
+    [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:_base
+                                                                 attribute:NSLayoutAttributeCenterX
+                                                                 relatedBy:NSLayoutRelationEqual
+                                                                    toItem:self
+                                                                 attribute:NSLayoutAttributeCenterX
+                                                                multiplier:1.0
+                                                                  constant:0.0]];
+    
+    [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:_base
+                                                                 attribute:NSLayoutAttributeBottom
+                                                                 relatedBy:NSLayoutRelationEqual
+                                                                    toItem:self
+                                                                 attribute:NSLayoutAttributeCenterY
+                                                                multiplier:1.0
+                                                                  constant:(height * 0.5) + BaseSpacing]];
+    
+    UIView *topDisk;
+    for (NSInteger index = 0 ; index < _diskSizes.count ; index++) {
+        UIView *disk = _diskViews[index];
+        CGFloat divide = 1.0 / _maximumNumberOfDisks;
+        CGFloat multiply = [(NSNumber *)_diskSizes[index] floatValue] * divide;
+        
+        [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:disk
+                                                                     attribute:NSLayoutAttributeCenterX
+                                                                     relatedBy:NSLayoutRelationEqual
+                                                                        toItem:self
+                                                                     attribute:NSLayoutAttributeCenterX
+                                                                    multiplier:1.0
+                                                                      constant:0.0]];
+        
+        
+        
+        [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:disk
+                                                                     attribute:NSLayoutAttributeWidth
+                                                                     relatedBy:NSLayoutRelationEqual
+                                                                        toItem:_base
+                                                                     attribute:NSLayoutAttributeWidth
+                                                                    multiplier:multiply
+                                                                      constant:0.0]];
+        
+        [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:disk
+                                                                     attribute:NSLayoutAttributeHeight
+                                                                     relatedBy:NSLayoutRelationEqual
+                                                                        toItem:nil
+                                                                     attribute:NSLayoutAttributeNotAnAttribute
+                                                                    multiplier:1.0
+                                                                      constant:DiskHeight]];
+        
+        if (index == 0) {
+            [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:disk
+                                                                         attribute:NSLayoutAttributeBottom
+                                                                         relatedBy:NSLayoutRelationEqual
+                                                                            toItem:self
+                                                                         attribute:NSLayoutAttributeCenterY
+                                                                        multiplier:1.0
+                                                                          constant:height * 0.5]];
+        } else {
+            [_variableConstraints addObject:[NSLayoutConstraint constraintWithItem:disk
+                                                                         attribute:NSLayoutAttributeBottom
+                                                                         relatedBy:NSLayoutRelationEqual
+                                                                            toItem:topDisk
+                                                                         attribute:NSLayoutAttributeTop
+                                                                        multiplier:1.0
+                                                                          constant:-DiskSpacing]];
+        }
+        topDisk = disk;
+    }
+    [NSLayoutConstraint activateConstraints:_variableConstraints];
+    [super updateConstraints];
+}
+
+- (void)tintColorDidChange {
+    [self reloadData];
+}
+
+#pragma mark - Public
+
+- (void)reloadData {
+    [self updateDisks];
+    [self highlightIfNeeded];
+    [self indicateTargetIfNeeded];
+    [self setNeedsUpdateConstraints];
+}
+
+#pragma mark - Private
+
+- (void)userDidTapTower {
+    [self.delegate towerOfHanoiTowerViewWasSelected:self];
+}
+
+- (void)updateDisks {
+    [_diskViews makeObjectsPerformSelector:@selector(removeFromSuperview)];
+    ORKRemoveConstraintsForRemovedViews(_variableConstraints, _diskViews);
+
+    [_diskViews removeAllObjects];
+    [_diskSizes removeAllObjects];
+
+    NSInteger numberOfDisks = [self.dataSource numberOfDisksInTowerOfHanoiView:self];
+    for (NSInteger index = 0 ; index < numberOfDisks ; index++) {
+        NSNumber *diskSize = [self.dataSource towerOfHanoiView:self diskAtIndex:index];
+        [_diskSizes addObject:diskSize];
+        UIView *diskView = [[UIView alloc] initWithFrame:CGRectZero];
+        diskView.backgroundColor = [self tintColor];
+        diskView.translatesAutoresizingMaskIntoConstraints = NO;
+        diskView.layer.cornerRadius = DiskHeight * 0.5;
+        diskView.clipsToBounds = YES;
+        [self addSubview:diskView];
+        [_diskViews addObject:diskView];
+    }
+}
+
+- (void)highlightIfNeeded {
+    if (self.isHighLighted) {
+        ((UIView *)_diskViews.lastObject).alpha = 0.2;
+    }
+}
+
+- (void)indicateTargetIfNeeded {
+    if (self.isTargeted) {
+        _base.backgroundColor = [self tintColor];
+    }
+}
+
+#pragma mark - Accessibility
+
+- (BOOL)isAccessibilityElement {
+    return YES;
+}
+
+- (NSString *)accessibilityLabel {
+    NSString *targetDisk = (self.isTargeted ? ORKLocalizedString(@"AX_TOWER_OF_HANOI_TARGET_DISK", nil) : nil);
+    return ORKAccessibilityStringForVariables(ORKLocalizedString(@"AX_TOWER_OF_HANOI_TOWER", nil), targetDisk);
+}
+
+- (NSString *)accessibilityHint {
+    if (!self.isHighLighted && [self.delegate towerOfHanoiHighlightedTowerView] != nil) {
+        return ORKLocalizedString(@"AX_TOWER_OF_HANOI_PLACE_DISK", nil);
+    }
+    
+    BOOL hasDisks = ([self.dataSource numberOfDisksInTowerOfHanoiView:self] > 0);
+    return (self.isHighLighted ? nil : (hasDisks ? ORKLocalizedString(@"AX_TOWER_OF_HANOI_SELECT_DISK", nil) : nil));
+}
+
+- (UIAccessibilityTraits)accessibilityTraits {
+    UIAccessibilityTraits traits = [super accessibilityTraits];
+    if (self.isHighLighted) {
+        traits |= UIAccessibilityTraitSelected;
+    }
+    
+    // Don't echo if when a disk is placed.
+    if (!self.isHighLighted && UIAccessibilityFocusedElement(UIAccessibilityNotificationVoiceOverIdentifier) == self) {
+        traits |= UIAccessibilityTraitStartsMediaSession;
+    }
+    
+    return traits;
+}
+
+- (NSString *)accessibilityValue {
+    
+    NSString *disksString = @"";
+    
+    for (NSNumber *diskSize in _diskSizes) {
+        disksString = ORKAccessibilityStringForVariables(disksString, diskSize.stringValue, @", ");
+    }
+    
+    NSString *value = (_diskSizes.count > 0 ? [NSString stringWithFormat:ORKLocalizedString(@"AX_TOWER_OF_HANOI_TOWER_CONTAINS", nil), disksString] : ORKLocalizedString(@"AX_TOWER_OF_HANOI_TOWER_EMPTY", nil));
+    
+    return value;
+}
+
+@end

ResearchKit/ActiveTasks/ORKWalkingTaskStepViewController.m

@@ -41,147 +41,7 @@
 #import "ORKWalkingTaskStep.h"
 #import "ORKPedometerRecorder.h"
 #import "ORKActiveStepView.h"
-
-
-static const CGFloat kProgressCircleDiameter = 10;
-static const CGFloat kProgressCircleSpacing = 4;
-
-@interface ORKWalkingProgressCircleView : UIView
-
-@property (nonatomic, assign) BOOL completed;
-
-@end
-
-
-@implementation ORKWalkingProgressCircleView
-
-- (instancetype)initWithFrame:(CGRect)frame {
-    self = [super initWithFrame:frame];
-    if (self) {
-        [self setCompleted:NO];
-        self.backgroundColor = [self tintColor];
-        self.layer.cornerRadius = kProgressCircleDiameter/2;
-    }
-    return self;
-}
-
-- (void)tintColorDidChange {
-    [super tintColorDidChange];
-    self.backgroundColor = [self tintColor];
-}
-
-- (CGSize)intrinsicContentSize {
-    return (CGSize){kProgressCircleDiameter,kProgressCircleDiameter};
-}
-
-- (CGSize)sizeThatFits:(CGSize)size {
-    return (CGSize){kProgressCircleDiameter,kProgressCircleDiameter};
-}
-
-- (void)setCompleted:(BOOL)completed {
-    _completed = completed;
-    self.alpha = (completed ? 1.0 : 0.6);
-}
-
-@end
-
-
-@interface ORKWalkingProgressView : UIView
-
-@property (nonatomic, assign) NSInteger count;
-
-@end
-
-
-@implementation ORKWalkingProgressView {
-    NSArray *_circles;
-    NSInteger _index;
-    NSTimer *_timer;
-}
-
-- (instancetype)initWithFrame:(CGRect)frame {
-    self = [super initWithFrame:frame];
-    if (self) {
-        self.count = 3;
-    }
-    return self;
-}
-
-- (void)dealloc {
-    [_timer invalidate];
-    _timer = nil;
-}
-
-- (void)setCount:(NSInteger)count {
-    _count = count;
-    if (count != [_circles count]) {
-        for (UIView *v in _circles) {
-            [v removeFromSuperview];
-        }
-        NSMutableArray *newCircles = [NSMutableArray array];
-        for (NSInteger idx = 0; idx < count; idx ++) {
-            ORKWalkingProgressCircleView *circle = [ORKWalkingProgressCircleView new];
-            [newCircles addObject:circle];
-            [self addSubview:circle];
-        }
-        
-        _circles = newCircles;
-        [self invalidateIntrinsicContentSize];
-        [self setNeedsLayout];
-        self.index = _index;
-    }
-}
-
-- (void)setIndex:(NSInteger)index {
-    _index = index;
-    [_circles enumerateObjectsUsingBlock:^(ORKWalkingProgressCircleView *circle, NSUInteger idx, BOOL *stop) {
-        circle.completed = (idx < _index);
-    }];
-}
-
-- (void)didMoveToWindow {
-    if (self.window) {
-        [self startAnimating];
-    } else {
-        [self stopAnimating];
-    }
-}
-- (void)stopAnimating {
-    [_timer invalidate];
-    _timer = nil;
-}
-
-- (void)incrementIndex {
-    self.index = (_index + 1) % (_count + 1);
-}
-
-- (void)startAnimating {
-    [self stopAnimating];
-    self.index = 0;
-    _timer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(incrementIndex) userInfo:nil repeats:YES];
-}
-
-- (CGSize)sizeThatFits:(CGSize)size {
-    size.height = kProgressCircleDiameter;
-    size.width = (_count * kProgressCircleDiameter) + MAX(_count-1,0) * kProgressCircleSpacing;
-    return size;
-}
-
-- (CGSize)intrinsicContentSize {
-    return [self sizeThatFits:CGSizeZero];
-}
-
-- (void)layoutSubviews {
-    CGSize sz = (CGSize){kProgressCircleDiameter,kProgressCircleDiameter};
-    CGFloat xStep = kProgressCircleDiameter + kProgressCircleSpacing;
-    CGFloat x0 = 0;
-    for (UIView *v in _circles) {
-        v.frame = (CGRect){{x0,0},sz};
-        x0 += xStep;
-    }
-}
-
-@end
+#import "ORKProgressView.h"
 
 
 @interface ORKWalkingContentView : ORKActiveStepCustomView {
@@ -189,7 +49,7 @@ static const CGFloat kProgressCircleSpacing = 4;
     NSLayoutConstraint *_topConstraint;
 }
 
-@property  (nonatomic, strong, readonly) ORKWalkingProgressView *progressView;
+@property  (nonatomic, strong, readonly) ORKProgressView *progressView;
 
 @end
 
@@ -198,14 +58,14 @@ static const CGFloat kProgressCircleSpacing = 4;
 
 - (void)willMoveToWindow:(UIWindow *)newWindow {
     [super willMoveToWindow:newWindow];
-    _screenType = ORKGetScreenTypeForWindow(newWindow);
+    _screenType = ORKGetVerticalScreenTypeForWindow(newWindow);
     [self updateConstraintConstants];
 }
 
 - (instancetype)initWithFrame:(CGRect)frame {
     self = [super initWithFrame:frame];
     if (self) {
-        _progressView = [ORKWalkingProgressView new];
+        _progressView = [ORKProgressView new];
         _progressView.translatesAutoresizingMaskIntoConstraints = NO;
         _screenType = ORKScreenTypeiPhone4;
         

ResearchKit/Artwork.xcassets/Active/phone-tower-of-hanoi.imageset/Contents.json

@@ -0,0 +1,31 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "filename" : "phone-tower-of-hanoi@2x.png"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "filename" : "phone-tower-of-hanoi@3x.png"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "filename" : "phone-tower-of-hanoi@2x~ipad.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ResearchKit/Artwork.xcassets/Active/phonepsat.imageset/Contents.json

@@ -0,0 +1,36 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "filename" : "phonepsat@2x.png"
+    },
+    {
+      "idiom" : "iphone",
+      "subtype" : "retina4",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "filename" : "phonepsat@3x.png"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "filename" : "phonepsat@2x~ipad.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ResearchKit/Artwork.xcassets/Active/timed-walkingman-outbound.imageset/Contents.json

@@ -0,0 +1,36 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "filename" : "timed-walkingman-outbound@2x.png"
+    },
+    {
+      "idiom" : "iphone",
+      "subtype" : "retina4",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "filename" : "timed-walkingman-outbound@3x.png"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "filename" : "timed-walkingman-outbound@2x~ipad.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ResearchKit/Artwork.xcassets/Active/timed-walkingman-return.imageset/Contents.json

@@ -0,0 +1,36 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "filename" : "timed-walkingman-return@2x.png"
+    },
+    {
+      "idiom" : "iphone",
+      "subtype" : "retina4",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "filename" : "timed-walkingman-return@3x.png"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "filename" : "timed-walkingman-return@2x~ipad.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ResearchKit/Artwork.xcassets/Active/timer.imageset/Contents.json

@@ -0,0 +1,36 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "filename" : "timer@2x.png"
+    },
+    {
+      "idiom" : "iphone",
+      "subtype" : "retina4",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "filename" : "timer@3x.png"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "filename" : "timer@2x~ipad.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ResearchKit/Artwork.xcassets/Active/tower-of-hanoi-second-screen.imageset/Contents.json

@@ -0,0 +1,31 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "filename" : "tower-of-hanoi-second-screen@2x.png"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "filename" : "tower-of-hanoi-second-screen@3x.png"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "filename" : "tower-of-hanoi-second-screen@2x~ipad.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ResearchKit/Artwork.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ResearchKit/Artwork.xcassets/arrowRight.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "UIButtonBarArrowRight.pdf"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ResearchKit/Artwork.xcassets/arrowRightLandscape.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "UIButtonBarArrowRightLandscape.pdf"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ResearchKit/Charts/ORKCenteredCollectionViewLayout.h

@@ -0,0 +1,35 @@
+/*
+ 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 <UIKit/UIKit.h>
+
+@interface ORKCenteredCollectionViewLayout : UICollectionViewFlowLayout
+
+@end

ResearchKit/Charts/ORKCenteredCollectionViewLayout.m

@@ -0,0 +1,55 @@
+/*
+ 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 "ORKCenteredCollectionViewLayout.h"
+
+@implementation ORKCenteredCollectionViewLayout
+
+- (NSArray<UICollectionViewLayoutAttributes *> *)layoutAttributesForElementsInRect:(CGRect)rect {
+    NSArray<UICollectionViewLayoutAttributes *> *attributesArray = [super layoutAttributesForElementsInRect:rect];
+    for (UICollectionViewLayoutAttributes *attributes in attributesArray) {
+        attributes.frame = [self layoutAttributesForItemAtIndexPath:attributes.indexPath].frame;
+    }
+    return attributesArray;
+}
+
+- (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)indexPath {
+    UICollectionViewLayoutAttributes *attributes = [super layoutAttributesForItemAtIndexPath:indexPath];
+    NSInteger count = [self.collectionView.dataSource collectionView:self.collectionView numberOfItemsInSection:indexPath.section];
+    NSIndexPath *lastItemIndexPath = [NSIndexPath indexPathForItem:count - 1 inSection:indexPath.section];
+    UICollectionViewLayoutAttributes *lastItemAttributes = [super layoutAttributesForItemAtIndexPath:lastItemIndexPath];
+    if (attributes.frame.origin.y == lastItemAttributes.frame.origin.y) {
+        CGFloat trailing = self.collectionView.bounds.size.width - lastItemAttributes.frame.origin.x - attributes.frame.size.width;
+        attributes.frame = CGRectOffset(attributes.frame, trailing * 0.5, 0);
+    }
+    return attributes;
+}
+
+@end

ResearchKit/Charts/ORKDiscreteGraphChartView.h

@@ -0,0 +1,57 @@
+/*
+ Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, James Cox.
+
+ 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 <UIKit/UIKit.h>
+#import "ORKGraphChartView.h"
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ The `ORKDiscreteGraphChartView` class presents data provided by an object conforming to the
+ `ORKGraphChartViewDataSource` protocol as a discrete graph of ranged points. You can optionally
+ display a line connecting each ranged points pair.
+ */
+ORK_CLASS_AVAILABLE
+@interface ORKDiscreteGraphChartView : ORKGraphChartView
+
+/**
+ A Boolean value indicating whether to draw a line connecting the minimum value and maximum value of
+ each ranged point represented by the graph view.
+ 
+ The default value for this property is `YES`.
+ */
+@property (nonatomic) BOOL drawsConnectedRanges;
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/Charts/ORKDiscreteGraphChartView.m

@@ -0,0 +1,135 @@
+/*
+ Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, James Cox.
+ 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:
+ 
+ 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 "ORKDiscreteGraphChartView.h"
+#import "ORKGraphChartView_Internal.h"
+#import "ORKHelpers.h"
+#import "ORKRangedPoint.h"
+
+
+@implementation ORKDiscreteGraphChartView
+
+#pragma mark - Init
+
+- (void)sharedInit {
+    [super sharedInit];
+    _drawsConnectedRanges = YES;
+}
+
+- (void)setDrawsConnectedRanges:(BOOL)drawsConnectedRanges {
+    _drawsConnectedRanges = drawsConnectedRanges;
+    [super updateLineLayers];
+    [super updatePointLayers];
+    [super layoutLineLayers];
+    [super layoutPointLayers];
+}
+
+#pragma mark - Draw
+
+- (BOOL)shouldDrawLinesForPlotIndex:(NSInteger)plotIndex {
+    return [self numberOfValidValuesForPlotIndex:plotIndex] > 0 && _drawsConnectedRanges;
+}
+
+- (void)updateLineLayersForPlotIndex:(NSInteger)plotIndex {
+    NSUInteger pointCount = self.dataPoints[plotIndex].count;
+    for (NSUInteger pointIndex = 0; pointIndex < pointCount; pointIndex++) {
+        ORKRangedPoint *dataPointValue = self.dataPoints[plotIndex][pointIndex];
+        if (!dataPointValue.isUnset && !dataPointValue.hasEmptyRange) {
+            CAShapeLayer *lineLayer = graphLineLayer();
+            lineLayer.strokeColor = [self colorForplotIndex:plotIndex].CGColor;
+            lineLayer.lineWidth = ORKGraphChartViewPointAndLineSize;
+            
+            [self.plotView.layer addSublayer:lineLayer];
+            [self.lineLayers[plotIndex] addObject:lineLayer];
+        }
+    }
+}
+
+- (void)layoutLineLayersForPlotIndex:(NSInteger)plotIndex {
+    NSUInteger lineLayerIndex = 0;
+    CGFloat positionOnXAxis = ORKCGFloatInvalidValue;
+    ORKRangedPoint *positionOnYAxis = nil;
+    NSUInteger pointCount = self.yAxisPoints[plotIndex].count;
+    for (NSUInteger pointIndex = 0; pointIndex < pointCount; pointIndex++) {
+        
+        ORKRangedPoint *dataPointValue = self.dataPoints[plotIndex][pointIndex];
+        
+        if (!dataPointValue.isUnset && !dataPointValue.hasEmptyRange) {
+            
+            UIBezierPath *linePath = [UIBezierPath bezierPath];
+            
+            positionOnXAxis = xAxisPoint(pointIndex, self.numberOfXAxisPoints, self.plotView.bounds.size.width);
+            positionOnXAxis += [self offsetForPlotIndex:plotIndex];
+            positionOnYAxis = self.yAxisPoints[plotIndex][pointIndex];
+            
+            [linePath moveToPoint:CGPointMake(positionOnXAxis, positionOnYAxis.minimumValue)];
+            [linePath addLineToPoint:CGPointMake(positionOnXAxis, positionOnYAxis.maximumValue)];
+            
+            CAShapeLayer *lineLayer = self.lineLayers[plotIndex][lineLayerIndex];
+            lineLayer.path = linePath.CGPath;
+            lineLayerIndex++;
+        }
+    }
+}
+
+- (CGFloat)offsetForPlotIndex:(NSInteger)plotIndex {
+    CGFloat pointWidth = ORKGraphChartViewPointAndLineSize;
+    
+    NSInteger numberOfPlots = [self numberOfPlots];
+    
+    CGFloat offset = 0;
+    
+    if (numberOfPlots % 2 == 0) {
+        // Even
+        offset = (plotIndex - numberOfPlots / 2 + 0.5) * pointWidth;
+    } else {
+        // Odd
+        offset = (plotIndex - numberOfPlots / 2) * pointWidth;
+    }
+    
+    return offset;
+}
+
+#pragma mark - Graph Calculations
+
+- (CGFloat)canvasYPointForXPosition:(CGFloat)xPosition plotIndex:(NSInteger)plotIndex {
+    BOOL snapped = [self isXPositionSnapped:xPosition];
+    CGFloat canvasYPosition = 0;
+    if (snapped) {
+        NSInteger pointIndex = [self pointIndexForXPosition:xPosition];
+        canvasYPosition = self.yAxisPoints[plotIndex][pointIndex-1].maximumValue;
+    }
+    return canvasYPosition;
+}
+
+@end

ResearchKit/Charts/ORKGraphChartView.h

@@ -0,0 +1,361 @@
+/*
+ Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, James Cox.
+ 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:
+
+ 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 <UIKit/UIKit.h>
+#import "ORKDefines.h"
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class ORKGraphChartView;
+@class ORKRangedPoint;
+
+/**
+ The graph chart view delegate protocol declares methods which forward pan gesture events occuring
+ within the bounds of an `ORKGraphChartView` object.
+*/
+ORK_AVAILABLE_DECL
+@protocol ORKGraphChartViewDelegate <NSObject>
+
+@optional
+/**
+ Notifies the delegate that a pan gesture has begun within the bounds of an `ORKGraphChartView`
+ object.
+
+ @param graphChartView      The graph chart view in which the gesture occurred.
+*/
+- (void)graphChartViewTouchesBegan:(ORKGraphChartView *)graphChartView;
+
+/**
+ Notifies the delegate of updates in the x-coordinate of an ongoing pan gesture within the bounds
+ of an `ORKGraphChartView` object.
+
+ @param graphChartView      The graph chart view object in which the gesture occurred.
+ @param xPosition           The updated x-coordinate of the ongoing pan gesture.
+*/
+- (void)graphChartView:(ORKGraphChartView *)graphChartView touchesMovedToXPosition:(CGFloat)xPosition;
+
+/**
+ Notifies the delegate that a pan gesture which began within the bounds of an `ORKGraphChartView`
+ object has ended.
+
+@param graphChartView       The graph chart view object in which the gesture occurred.
+*/
+- (void)graphChartViewTouchesEnded:(ORKGraphChartView *)graphChartView;
+
+@end
+
+
+/**
+ An object that adopts the `ORKGraphChartViewDataSource` protocol is responsible for providing the
+ data required to populate an `ORKGraphChartView` object.
+
+ At a minimum, a data source object must implement the `graphChartView:numberOfPointsInPlot:` and
+ `graphChartView:plot:valueForPointAtIndex:` methods. These methods are responsible for returning
+ the number of points in a plot and the points themselves. Each point in a plot is represented by an
+ object of the `ORKRangedPoint` class. A data source object may provide additional information to
+ the graph chart view by implementing the optional methods.
+
+ When configuring an `ORKGraphChartView` object, assign your data source to its `dataSource`
+ property.
+*/
+ORK_AVAILABLE_DECL
+@protocol ORKGraphChartViewDataSource <NSObject>
+
+@required
+/**
+ Asks the data source for the number of range points to be plotted by the graph chart view at the
+ specified plot index.
+
+ @param graphChartView      The graph chart view asking for the number of range points.
+ @param plotIndex           An index number identifying the plot in the graph chart view. This index
+                                is 0 in a single-plot graph chart view.
+
+ @return The number of range points in the plot at `plotIndex`.
+*/
+- (NSInteger)graphChartView:(ORKGraphChartView *)graphChartView numberOfPointsForPlotIndex:(NSInteger)plotIndex;
+
+
+/**
+ Asks the data source for the range point to be plotted at the specified point index for the
+ specified plot.
+
+ @param graphChartView      The graphChartView asking for the range point.
+ @param pointIndex          An index number identifying the range point in the graph chart view.
+ @param plotIndex           An index number identifying the plot in the graph chart view. This index
+                                is 0 in a single-plot graph chart view.
+
+ @return The range point specified by `pointIndex` in the plot specified by `plotIndex` for the 
+ specified graph chart view`.
+*/
+- (ORKRangedPoint *)graphChartView:(ORKGraphChartView *)graphChartView pointForPointIndex:(NSInteger)pointIndex plotIndex:(NSInteger)plotIndex;
+
+@optional
+/**
+ Asks the data source for the number of plots to be plotted by the graph chart view. If this method
+ is not implemented, the graph chart view will assume it has a single plot.
+
+ @param graphChartView      The graph chart view asking for the number of plots.
+
+ @return The number of plots in the graph chart view.
+*/
+- (NSInteger)numberOfPlotsInGraphChartView:(ORKGraphChartView *)graphChartView;
+
+/**
+ Asks the data source for the color of the specified plot.
+ 
+ If this method is not implemented, the first plot will use the graph chart view `tintColor`, and
+ all subsequent plots will use the current `referenceLineColor`.
+ 
+ @param graphChartView      The graph chart view asking for the color of the segment.
+ @param plotIndex           An index number identifying the plot in the graph chart view. This index
+                                is always 0 in single-plot graph chart views.
+ 
+ @return The color of the segment at the specified `index` in `pieChartView`.
+ */
+- (UIColor *)graphChartView:(ORKGraphChartView *)graphChartView colorForPlotIndex:(NSInteger)plotIndex;
+
+/**
+ Asks the data source which plot should the scrubber snap to in multi-graph chart views.
+ 
+ If this method is not implemented, the scrubber snaps over the first plot.
+ 
+ @param graphChartView      The graph chart view asking for the scrubbing plot index.
+ 
+ @return The index of the plot the scrubber should snap to.
+ */
+- (NSInteger)scrubbingPlotIndexForGraphChartView:(ORKGraphChartView *)graphChartView;
+
+/**
+ Asks the data source for the upper limit of the y-axis drawn by the graph chart view.
+
+ If this method is not implemented, the greatest `maximumValue` of all `ORKRangedPoint` instances
+ returned in `graphChartView:plot:valueForPointAtIndex:` will be used.
+
+ See also: `graphChartView:plot:valueForPointAtIndex:`.
+
+ @param graphChartView      The graph chart view asking for the maximum value.
+
+ @return The maximum value of the y-axis drawn by `graphChartView`.
+*/
+- (CGFloat)maximumValueForGraphChartView:(ORKGraphChartView *)graphChartView;
+
+/**
+ Asks the data source for the lower limit of the y-axis drawn by the graph chart view.
+
+ If this method is not implemented, The smallest `minimumValue` of all ORKRangedPoint instances
+ returned in `graphChartView:plot:valueForPointAtIndex:` will be used.
+
+ See also: `graphChartView:plot:valueForPointAtIndex:`.
+
+ @param graphChartView      The graph chart view asking for the minimum value.
+
+ @return The minimum value of the y-axis drawn by `graphChartView`.
+*/
+- (CGFloat)minimumValueForGraphChartView:(ORKGraphChartView *)graphChartView;
+
+/**
+ Asks the data source for the number of divisions in the x-axis. The value is ignored if it is lower
+ than the number of data points. A title appearing adjacent to each
+ division may optionally be returned in `graphChartView:titleForXAxisAtPointIndex:`.
+
+ @param graphChartView      The graph chart view asking for the number of divisions in its x-axis.
+
+ @return The number of divisions in the x-axis for `graphChartView`.
+*/
+- (NSInteger)numberOfDivisionsInXAxisForGraphChartView:(ORKGraphChartView *)graphChartView;
+
+/**
+ Asks the data source for the title to be displayed adjacent to each division in the x-axis (the 
+ number returned by `numberOfDivisionsInXAxisForGraphChartView:`).
+
+ If this method is not implemented, the x-axis will not have titles.
+
+ See also: `numberOfDivisionsInXAxisForGraphChartView:`.
+
+ @param graphChartView  The graph chart view asking for the tile.
+ @param pointIndex      The index of the specified x-axis division.
+
+ @return The title string to be displayed adjacent to each division of the x-axis of the graph chart
+ view.
+*/
+- (NSString *)graphChartView:(ORKGraphChartView *)graphChartView titleForXAxisAtPointIndex:(NSInteger)pointIndex;
+
+@end
+
+
+/**
+ The `ORKGraphChartView` class is an abstract class. It holds properties and methods common to
+ subclasses like `ORKLineGraphChartView` and `ORKDiscreteGraphChartView`. You should not instantiate
+ this class directly, use one of the subclasses instead.
+*/
+ORK_CLASS_AVAILABLE
+@interface ORKGraphChartView : UIView
+
+/**
+ The minimum value of the y-axis.
+
+ This value can be provided to an instance of `ORKGraphChartView` by implementing the optional
+ `minimumValueForGraphChartView:` method of the `ORKGraphChartViewDataSource` protocol.
+
+ If `minimumValueForGraphChartView:` is not implemented, the minimum value will be assigned to the
+ smallest value of the `minimumValue` property of all `ORKRangedPoint` instances returned by the
+ graph chart view data source.
+*/
+@property (nonatomic, readonly) CGFloat minimumValue;
+
+/**
+ The maximum value of the y-axis.
+
+ This value can be provided to an instance of `ORKGraphChartView` by implementing the
+ optional `maximumValueForGraphChartView:` method of the `ORKGraphChartViewDataSource` protocol.
+
+ If `maximumValueForGraphChartView:` is not implemented, the maximum value will be assigned to the
+ largest value of the `maximumValue` property of all `ORKRangedPoint` instances returned by the
+ graph chart view data source.
+*/
+@property (nonatomic, readonly) CGFloat maximumValue;
+
+/**
+ A Boolean value indicating whether the graph chart view should draw horizontal reference lines.
+
+ The default value of this property is NO.
+ */
+@property (nonatomic) BOOL showsHorizontalReferenceLines;
+
+/**
+ A Boolean value indicating whether the graph chart view should draw vertical reference lines.
+
+ The default value of this property is NO.
+*/
+@property (nonatomic) BOOL showsVerticalReferenceLines;
+
+/**
+ The delegate will be notified of pan gesture events occuring within the bounds of the graph chart
+ view.
+
+ See the `ORKGraphChartViewDelegate` protocol.
+*/
+@property (nonatomic, weak, nullable) id <ORKGraphChartViewDelegate> delegate;
+
+/**
+ The dataSource responsible for providing the data required to populate the graph chart view.
+
+ See the `ORKGraphChartViewDataSource` protocol.
+*/
+@property (nonatomic, weak) id <ORKGraphChartViewDataSource> dataSource;
+
+/**
+ The color of the axes drawn by the graph chart view.
+ 
+ The default value for this property is a very light gray color. Setting this property to `nil` 
+ resets it to its default value.
+*/
+@property (nonatomic, strong, null_resettable) UIColor *axisColor;
+
+/**
+ The color of the vertical axis titles.
+ 
+ The default value for this property is a light gray color. Setting this property to `nil` resets it
+ to its default value.
+
+ @note The horizontal axis titles use the current `tintColor`.
+*/
+@property (nonatomic, strong, null_resettable) UIColor *verticalAxisTitleColor;
+
+/**
+ The color of the reference lines.
+ 
+ The default value for this property is a light gray color. Setting this property to `nil` resets it
+ to its default value.
+*/
+@property (nonatomic, strong, null_resettable) UIColor *referenceLineColor;
+
+/**
+ The background color of the thumb on the scrubber line.
+ 
+ The default value for this property is a white color. Setting this property to `nil` resets it to
+ its default value.
+*/
+@property (nonatomic, strong, null_resettable) UIColor *scrubberThumbColor;
+
+/**
+ The color of the scrubber line.
+ 
+ The default value for this property is a gray color. Setting this property to `nil` resets it to
+ its default value.
+*/
+@property (nonatomic, strong, null_resettable) UIColor *scrubberLineColor;
+
+/**
+ The string that will be displayed if no data points are provided by the `dataSource`.
+ 
+ The default value for this property is an appropriate message string. Setting this property to
+ `nil` resets it to its default value.
+*/
+@property (nonatomic, copy, null_resettable) NSString *noDataText;
+
+/**
+ An image to be optionally displayed in place of the maximum value label on the y-axis.
+ 
+ The default value for this property is `nil`.
+*/
+@property (nonatomic, strong, nullable) UIImage *maximumValueImage;
+
+/**
+ An image to be optionally displayed in place of the minimum value label on the y-axis.
+ 
+ The default value for this property is `nil`.
+*/
+@property (nonatomic, strong, nullable) UIImage *minimumValueImage;
+
+/**
+ The gesture recognizer that is used for scrubbing by the graph chart view.
+ 
+ This object is instatiated and added to the view when it is created.
+ */
+@property (nonatomic, strong, readonly) UIPanGestureRecognizer *panGestureRecognizer;
+
+/**
+ Animates the graph when it first displays on the screen.
+ 
+ You can optionally call this method from the `viewWillAppear:` implementation of the view
+ controller that owns the graph chart view.
+ 
+ @param animationDuration       The duration of the appearing animation.
+ */
+- (void)animateWithDuration:(NSTimeInterval)animationDuration;
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/Charts/ORKGraphChartView_Internal.h

@@ -0,0 +1,122 @@
+/*
+ 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 "ORKGraphChartView.h"
+#import "ORKHelpers.h"
+
+
+@class ORKXAxisView;
+
+typedef NS_ENUM(NSUInteger, ORKGraphAnimationType) {
+    ORkGraphAnimationTypeNone,
+    ORKGraphAnimationTypeFade,
+    ORKGraphAnimationTypeGrow,
+    ORKGraphAnimationTypePop
+};
+
+extern const CGFloat ORKGraphChartViewLeftPadding;
+extern const CGFloat ORKGraphChartViewPointAndLineSize;
+extern const CGFloat ORKGraphChartViewScrubberMoveAnimationDuration;
+extern const CGFloat ORKGraphChartViewAxisTickLength;
+extern const CGFloat ORKGraphChartViewYAxisTickPadding;
+
+
+inline static CAShapeLayer *graphLineLayer() {
+    CAShapeLayer *lineLayer = [CAShapeLayer layer];
+    lineLayer.fillColor = [UIColor clearColor].CGColor;
+    lineLayer.lineJoin = kCALineJoinRound;
+    lineLayer.lineCap = kCALineCapRound;
+    lineLayer.opacity = 1.0;
+    return lineLayer;
+}
+
+static inline CGFloat xAxisPoint(NSInteger pointIndex, NSInteger numberOfXAxisPoints, CGFloat canvasWidth) {
+    return round((canvasWidth / MAX(1, numberOfXAxisPoints - 1)) * pointIndex);
+}
+
+
+@interface ORKGraphChartView ()
+
+@property (nonatomic) NSMutableArray<NSMutableArray<CAShapeLayer *> *> *lineLayers;
+
+@property (nonatomic) NSInteger numberOfXAxisPoints;
+
+@property (nonatomic) NSMutableArray<NSMutableArray<ORKRangedPoint *> *> *dataPoints; // Actual data
+
+@property (nonatomic) NSMutableArray<NSMutableArray<ORKRangedPoint *> *> *yAxisPoints; // Normalized for the plot view height
+
+@property (nonatomic) UIView *plotView; // Holds the plots
+
+@property (nonatomic) UIView *scrubberLine;
+
+@property (nonatomic) BOOL scrubberAccessoryViewsHidden;
+
+- (void)sharedInit;
+
+- (NSInteger)numberOfPlots;
+
+- (CGFloat)offsetForPlotIndex:(NSInteger)plotIndex;
+
+- (NSInteger)numberOfValidValuesForPlotIndex:(NSInteger)plotIndex;
+
+- (NSInteger)scrubbingPlotIndex;
+
+- (CGFloat)valueForCanvasXPosition:(CGFloat)xPosition plotIndex:(NSInteger)plotIndex;
+
+- (NSInteger)pointIndexForXPosition:(CGFloat)xPosition;
+
+- (void)updateScrubberViewForXPosition:(CGFloat)xPosition plotIndex:(NSInteger)plotIndex;
+
+- (void)updateScrubberLineAccessories:(CGFloat)xPosition plotIndex:(NSInteger)plotIndex;
+
+- (BOOL)isXPositionSnapped:(CGFloat)xPosition;
+
+- (void)updatePlotColors;
+
+- (void)updateLineLayers;
+
+- (void)layoutLineLayers;
+
+- (void)updatePointLayers;
+
+- (void)layoutPointLayers;
+
+- (UIColor *)colorForplotIndex:(NSInteger)plotIndex;
+
+- (void)animateLayersSequentiallyWithDuration:(NSTimeInterval)duration;
+
+- (void)animateLayer:(CALayer *)layer
+             keyPath:(NSString *)keyPath
+            duration:(CGFloat)duration
+          startDelay:(CGFloat)startDelay
+      timingFunction:(CAMediaTimingFunction *)timingFunction;
+
+@end

ResearchKit/Charts/ORKLineGraphChartView.h

@@ -0,0 +1,51 @@
+/*
+ Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, James Cox.
+
+ 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 <UIKit/UIKit.h>
+#import "ORKGraphChartView.h"
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ The `ORKLineGraphChartView` class presents the data provided by an object conforming to the
+ `ORKGraphChartViewDataSource` protocol as a line graph.
+ 
+ The primary plot is colored by the `tintColor`, and any additional plots are colored using the
+ `referenceLineColor`.
+ */
+ORK_CLASS_AVAILABLE
+@interface ORKLineGraphChartView : ORKGraphChartView
+
+@end
+
+NS_ASSUME_NONNULL_END

ResearchKit/Charts/ORKLineGraphChartView.m

@@ -0,0 +1,269 @@
+/*
+ Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, James Cox.
+ 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:
+ 
+ 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 "ORKLineGraphChartView.h"
+#import "ORKGraphChartView_Internal.h"
+#import "ORKHelpers.h"
+#import "ORKRangedPoint.h"
+
+
+const CGFloat FillColorAlpha = 0.4;
+
+@implementation ORKLineGraphChartView {
+    NSMutableDictionary *_fillLayers;
+}
+
+#pragma mark - Init
+
+- (void)sharedInit {
+    [super sharedInit];
+    _fillLayers = [NSMutableDictionary new];
+}
+
+- (BOOL)shouldDrawLinesForPlotIndex:(NSInteger)plotIndex {
+    return [self numberOfValidValuesForPlotIndex:plotIndex] > 1;
+}
+
+#pragma mark - Drawing
+
+- (void)updatePlotColors {
+    [super updatePlotColors];
+    NSInteger numberOfPlots = [self numberOfPlots];
+    for (NSUInteger plotIndex = 0; plotIndex < numberOfPlots; plotIndex++) {
+        UIColor *fillColor = [[self colorForplotIndex:plotIndex] colorWithAlphaComponent:FillColorAlpha];
+        CAShapeLayer *fillLayer = _fillLayers[@(plotIndex)];
+        fillLayer.fillColor = fillColor.CGColor;
+    }
+}
+
+- (void)updateLineLayers {
+    [[_fillLayers allValues] makeObjectsPerformSelector:@selector(removeFromSuperlayer)];
+    [_fillLayers removeAllObjects];
+    [super updateLineLayers];
+}
+
+- (void)updateLineLayersForPlotIndex:(NSInteger)plotIndex {
+    BOOL previousPointExists = NO;
+    BOOL emptyDataPresent = NO;
+    NSUInteger pointCount = self.dataPoints[plotIndex].count;
+    for (NSUInteger pointIndex = 0; pointIndex < pointCount; pointIndex++) {
+        if (self.dataPoints[plotIndex][pointIndex].isUnset) {
+            emptyDataPresent = YES;
+            continue;
+        }
+        
+        if (!previousPointExists) {
+            previousPointExists = YES;
+            emptyDataPresent = NO;
+            continue;
+        }
+        
+        CAShapeLayer *lineLayer = graphLineLayer();
+        lineLayer.strokeColor = [self colorForplotIndex:plotIndex].CGColor;
+        lineLayer.lineWidth = 2.0;
+        
+        if (emptyDataPresent) {
+            lineLayer.lineDashPattern = @[@12, @6];
+            emptyDataPresent = NO;
+        }
+        
+        [self.plotView.layer addSublayer:lineLayer];
+        [self.lineLayers[plotIndex] addObject:lineLayer];
+    }
+    
+    CAShapeLayer *fillLayer = [CAShapeLayer layer];
+    fillLayer.fillColor = [[self colorForplotIndex:plotIndex] colorWithAlphaComponent:0.4].CGColor;
+    
+    [self.plotView.layer addSublayer:fillLayer];
+    _fillLayers[@(plotIndex)] = fillLayer;
+}
+
+- (void)layoutLineLayersForPlotIndex:(NSInteger)plotIndex {
+    CAShapeLayer *fillLayer = _fillLayers[@(plotIndex)];
+    
+    if (fillLayer == nil) {
+        // Skip for a nil fillLayer
+        return;
+    }
+    
+    NSUInteger lineLayerIndex = 0;
+    UIBezierPath *fillPath = [UIBezierPath bezierPath];
+    CGFloat positionOnXAxis = ORKCGFloatInvalidValue;
+    ORKRangedPoint *positionOnYAxis = nil;
+    BOOL previousPointExists = NO;
+    NSUInteger pointCount = self.yAxisPoints[plotIndex].count;
+    for (NSUInteger pointIndex = 0; pointIndex < pointCount; pointIndex++) {
+        if (self.dataPoints[plotIndex][pointIndex].isUnset) {
+            continue;
+        }
+        
+        UIBezierPath *linePath = [UIBezierPath bezierPath];
+        
+        if (positionOnXAxis != ORKCGFloatInvalidValue) {
+            previousPointExists = YES;
+            [linePath moveToPoint:CGPointMake(positionOnXAxis, positionOnYAxis.minimumValue)];
+            if ([fillPath isEmpty]) {
+                [fillPath moveToPoint:CGPointMake(positionOnXAxis, CGRectGetHeight(self.plotView.frame))];
+            }
+            [fillPath addLineToPoint:CGPointMake(positionOnXAxis, positionOnYAxis.minimumValue)];
+        }
+        
+        positionOnXAxis = xAxisPoint(pointIndex, self.numberOfXAxisPoints, self.plotView.bounds.size.width);
+        positionOnYAxis = self.yAxisPoints[plotIndex][pointIndex];
+        
+        if (!previousPointExists) {
+            continue;
+        }
+        
+        [linePath addLineToPoint:CGPointMake(positionOnXAxis, positionOnYAxis.minimumValue)];
+        [fillPath addLineToPoint:CGPointMake(positionOnXAxis, positionOnYAxis.minimumValue)];
+        
+        CAShapeLayer *lineLayer = self.lineLayers[plotIndex][lineLayerIndex];
+        lineLayer.path = linePath.CGPath;
+        lineLayerIndex++;
+    }
+    
+    [fillPath addLineToPoint:CGPointMake(positionOnXAxis, CGRectGetHeight(self.plotView.frame))];
+        
+    fillLayer.path = fillPath.CGPath;
+}
+
+#pragma mark - Graph Calculations
+
+- (CGFloat)valueForCanvasXPosition:(CGFloat)xPosition plotIndex:(NSInteger)plotIndex {
+    CGFloat value = [super valueForCanvasXPosition:xPosition plotIndex:plotIndex];
+    
+    CGFloat viewWidth = self.plotView.bounds.size.width;
+    NSInteger numberOfXAxisPoints = self.numberOfXAxisPoints;
+
+    if (value == ORKCGFloatInvalidValue) {
+        NSInteger pointIndex = 0;
+        for (pointIndex = 0; pointIndex < (numberOfXAxisPoints - 1); pointIndex++) {
+            CGFloat xAxisPointValue = xAxisPoint(pointIndex, numberOfXAxisPoints, viewWidth);
+            if (xAxisPointValue > xPosition) {
+                break;
+            }
+        }
+        
+        NSInteger previousValidIndex = [self previousValidPointIndexForPointIndex:pointIndex plotIndex:plotIndex];
+        NSInteger nextValidIndex = [self nextValidPointIndexForPointIndex:pointIndex plotIndex:plotIndex];
+        
+        CGFloat x1 = xAxisPoint(previousValidIndex, numberOfXAxisPoints, viewWidth);
+        CGFloat x2 = xAxisPoint(nextValidIndex, numberOfXAxisPoints, viewWidth);
+        
+        CGFloat y1 = self.dataPoints[plotIndex][previousValidIndex].minimumValue;
+        CGFloat y2 = self.dataPoints[plotIndex][nextValidIndex].minimumValue;
+        
+        if (y1 == ORKCGFloatInvalidValue || y2 == ORKCGFloatInvalidValue) {
+            return ORKCGFloatInvalidValue;
+        }
+
+        CGFloat slope = (y2 - y1)/(x2 - x1);
+        
+        //  (y2 - y3)/(x2 - x3) = m
+        value = y2 - (slope * (x2 - xPosition));
+    }
+    return value;
+}
+
+- (CGFloat)canvasYPointForXPosition:(CGFloat)xPosition plotIndex:(NSInteger)plotIndex {
+    NSInteger pointIndex = [self pointIndexForXPosition:xPosition];
+    NSInteger nextValidIndex = [self nextValidPointIndexForPointIndex:pointIndex plotIndex:plotIndex];
+    NSInteger previousValidIndex = [self previousValidPointIndexForPointIndex:pointIndex plotIndex:plotIndex];
+    
+    CGFloat viewWidth = self.plotView.bounds.size.width;
+    NSInteger numberOfXAxisPoints = self.numberOfXAxisPoints;
+
+    CGFloat x1 = xAxisPoint(previousValidIndex, numberOfXAxisPoints, viewWidth);
+    CGFloat x2 = xAxisPoint(nextValidIndex, numberOfXAxisPoints, viewWidth);
+    
+    CGFloat y1 = self.yAxisPoints[plotIndex][previousValidIndex].minimumValue;
+    CGFloat y2 = self.yAxisPoints[plotIndex][nextValidIndex].minimumValue;
+        
+    CGFloat slope = (y2 - y1)/(x2 - x1);
+    
+    //  (y2 - y3)/(x2 - x3) = m
+    CGFloat canvasYPosition = y2 - (slope * (x2 - xPosition));
+    
+    return canvasYPosition;
+}
+
+- (NSInteger)nextValidPointIndexForPointIndex:(NSInteger)pointIndex plotIndex:(NSInteger)plotIndex {
+    NSUInteger validPosition = pointIndex;
+    
+    NSUInteger pointCountMinusOne = (self.dataPoints[plotIndex].count - 1);
+    while (validPosition < pointCountMinusOne) {
+        if (self.dataPoints[plotIndex][validPosition].maximumValue != ORKCGFloatInvalidValue) {
+            break;
+        }
+        validPosition++;
+    }
+    
+    return validPosition;
+}
+
+- (NSInteger)previousValidPointIndexForPointIndex:(NSInteger)pointIndex plotIndex:(NSInteger)plotIndex {
+    NSInteger validPosition = pointIndex - 1;
+    while (validPosition > 0) {
+        if (self.dataPoints[plotIndex][validPosition].minimumValue != ORKCGFloatInvalidValue) {
+            break;
+        }
+        validPosition--;
+    }
+    return validPosition;
+}
+
+#pragma mark - Animations
+
+- (void)animateWithDuration:(NSTimeInterval)animationDuration {
+    [_fillLayers enumerateKeysAndObjectsUsingBlock:^(id key, CAShapeLayer *fillLayer, BOOL *stop) {
+        [fillLayer removeAllAnimations];
+        fillLayer.opacity = 0;
+    }];
+    
+    [super animateWithDuration:animationDuration];
+}
+
+- (void)animateLayersSequentiallyWithDuration:(NSTimeInterval)duration {
+    [super animateLayersSequentiallyWithDuration:duration];
+    
+    [_fillLayers enumerateKeysAndObjectsUsingBlock:^(id key, CAShapeLayer *layer, BOOL *stop) {
+        [self animateLayer:layer
+                   keyPath:@"opacity"
+                  duration:duration * (1/3.0)
+                startDelay:duration * (2/3.0)
+            timingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]];
+    }];
+}
+
+@end

ResearchKit/Charts/ORKPieChartLegendCell.h

@@ -0,0 +1,39 @@
+/*
+ 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 <UIKit/UIKit.h>
+
+@interface ORKPieChartLegendCell : UICollectionViewCell
+
+@property (nonatomic, strong) UILabel *titleLabel;
+
+@property (nonatomic, strong) UIView *dotView;
+
+@end

ResearchKit/Charts/ORKPieChartLegendCell.m

@@ -0,0 +1,132 @@
+/*
+ Copyright (c) 2015, James Cox. 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:
+ 
+ 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 "ORKPieChartLegendCell.h"
+#import "ORKSkin.h"
+
+
+const CGFloat DotViewSize = 10.0;
+const CGFloat DotToLabelPadding = 6.0;
+
+@implementation ORKPieChartLegendCell
+
+#pragma mark - Init
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+    if (self = [super initWithCoder:aDecoder]) {
+        [self sharedInit];
+    }
+    return self;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+    if (self = [super initWithFrame:frame]) {
+        [self sharedInit];
+    }
+    return self;
+}
+
+- (void)sharedInit {
+    _titleLabel = [UILabel new];
+    _titleLabel.textColor = ORKColor(ORKChartDefaultTextColorKey);
+    _titleLabel.textAlignment = NSTextAlignmentCenter;
+    _titleLabel.translatesAutoresizingMaskIntoConstraints = NO;
+    _titleLabel.isAccessibilityElement = NO;
+    _dotView = [UIView new];
+    _dotView.translatesAutoresizingMaskIntoConstraints = NO;
+    _dotView.layer.cornerRadius = DotViewSize * 0.5;
+    _dotView.layer.masksToBounds = YES;
+    [self.contentView addSubview:_titleLabel];
+    [self.contentView addSubview:_dotView];
+    
+    [self setUpConstraints];
+}
+
+#pragma mark - Layout
+
+- (void)setUpConstraints {
+    NSMutableArray<NSLayoutConstraint *> *constraints = [NSMutableArray new];
+    NSDictionary *views = NSDictionaryOfVariableBindings(_titleLabel, _dotView);
+    
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(>=0)-[_titleLabel]-(>=0)-|"
+                                                                             options:(NSLayoutFormatOptions)0
+                                                                             metrics:nil
+                                                                               views:views]];
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(>=0)-[_dotView]-(>=0)-|"
+                                                                             options:(NSLayoutFormatOptions)0
+                                                                             metrics:nil
+                                                                               views:views]];
+    [constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_dotView]-DotToLabelPadding-[_titleLabel]|"
+                                                                             options:(NSLayoutFormatOptions)0
+                                                                             metrics:@{@"DotToLabelPadding": @(DotToLabelPadding)}
+                                                                               views:views]];
+    
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_dotView
+                                                        attribute:NSLayoutAttributeHeight
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:nil
+                                                        attribute:0
+                                                       multiplier:1.0
+                                                         constant:DotViewSize]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_dotView
+                                                        attribute:NSLayoutAttributeWidth
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:_dotView
+                                                        attribute:NSLayoutAttributeHeight
+                                                       multiplier:1.0
+                                                         constant:0.0]];
+    [constraints addObject:[NSLayoutConstraint constraintWithItem:_dotView
+                                                        attribute:NSLayoutAttributeCenterY
+                                                        relatedBy:NSLayoutRelationEqual
+                                                           toItem:_titleLabel
+                                                        attribute:NSLayoutAttributeCenterY
+                                                       multiplier:1.0
+                                                         constant:0.0]];
+    
+    [NSLayoutConstraint activateConstraints:constraints];
+}
+
++ (BOOL)requiresConstraintBasedLayout {
+    return YES;
+}
+
+#pragma mark - Accessibility
+
+- (BOOL)isAccessibilityElement {
+    return YES;
+}
+
+- (NSString *)accessibilityLabel {
+    return _titleLabel.accessibilityLabel;
+}
+
+@end

ResearchKit/Charts/ORKPieChartLegendView.h

@@ -0,0 +1,50 @@
+/*
+ Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, James Cox.
+ 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:
+ 
+ 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 <UIKit/UIKit.h>
+
+
+@class ORKPieChartView;
+
+@interface ORKPieChartLegendView : UICollectionView <UICollectionViewDataSource, UICollectionViewDelegateFlowLayout>
+
+@property (nonatomic) UIFont *labelFont;
+
+- (instancetype)initWithFrame:(CGRect)frame
+         collectionViewLayout:(UICollectionViewLayout *)collectionViewLayout NS_UNAVAILABLE;
+
+- (instancetype)initWithParentPieChartView:(ORKPieChartView *)parentPieChartView NS_DESIGNATED_INITIALIZER;
+
+- (void)animateWithDuration:(NSTimeInterval)animationDuration;
+
+@end

ResearchKit/Charts/ORKPieChartLegendView.m

@@ -0,0 +1,159 @@
+/*
+ Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, James Cox.
+ 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:
+ 
+ 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 "ORKPieChartLegendView.h"
+#import "ORKPieChartView_Internal.h"
+#import "ORKPieChartLegendCell.h"
+#import "ORKCenteredCollectionViewLayout.h"
+#import "ORKHelpers.h"
+
+
+@implementation ORKPieChartLegendView {
+    __weak ORKPieChartView *_parentPieChartView;
+    ORKPieChartLegendCell *_sizingCell;
+    CGFloat _sumOfValues;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame
+         collectionViewLayout:(UICollectionViewLayout *)collectionViewLayout {
+    ORKThrowMethodUnavailableException();
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+    self = [self initWithParentPieChartView:nil];
+    return self;
+}
+
+- (instancetype)initWithParentPieChartView:(ORKPieChartView *)parentPieChartView {
+    ORKCenteredCollectionViewLayout *centeredCollectionViewLayout = [[ORKCenteredCollectionViewLayout alloc] init];
+    centeredCollectionViewLayout.estimatedItemSize = CGSizeMake(100.0, 30.0);
+    self = [super initWithFrame:CGRectZero collectionViewLayout:centeredCollectionViewLayout];
+    if (self) {
+        _parentPieChartView = parentPieChartView;
+        _sumOfValues = 0;
+        NSInteger numberOfSegments = [_parentPieChartView.dataSource numberOfSegmentsInPieChartView:_parentPieChartView];
+        for (NSInteger idx = 0; idx < numberOfSegments; idx++) {
+            CGFloat value = [_parentPieChartView.dataSource pieChartView:_parentPieChartView valueForSegmentAtIndex:idx];
+            _sumOfValues += value;
+        }
+        
+        [self registerClass:[ORKPieChartLegendCell class] forCellWithReuseIdentifier:@"cell"];
+
+        _sizingCell = [[ORKPieChartLegendCell alloc] initWithFrame:CGRectZero];
+
+        self.backgroundColor = [UIColor clearColor];
+        self.translatesAutoresizingMaskIntoConstraints = NO;
+        self.dataSource = self;
+        self.delegate = self;
+        
+        [self setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
+        [self setContentCompressionResistancePriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
+        
+    }
+    return self;
+}
+
+- (void)setLabelFont:(UIFont *)labelFont {
+    _labelFont = labelFont;
+    _sizingCell.titleLabel.font = _labelFont;
+    [self reloadData];
+    [self invalidateIntrinsicContentSize];
+}
+
+- (CGSize)intrinsicContentSize {
+    CGSize size = CGSizeMake(UIViewNoIntrinsicMetric, [self.collectionViewLayout collectionViewContentSize].height);
+    return size;
+}
+
+- (void)animateWithDuration:(NSTimeInterval)animationDuration {
+    NSArray<UICollectionViewCell *> *sortedCells = [self.visibleCells sortedArrayUsingComparator:^NSComparisonResult(UICollectionViewCell *cell1, UICollectionViewCell *cell2) {
+        return cell1.tag > cell2.tag;
+    }];
+    NSUInteger cellCount = sortedCells.count;
+    NSTimeInterval interAnimationDelay = 0.05;
+    NSTimeInterval singleAnimationDuration = animationDuration - (interAnimationDelay * (cellCount-1));
+    if (singleAnimationDuration < 0) {
+        interAnimationDelay = 0;
+        singleAnimationDuration = animationDuration;
+    }
+    for (NSUInteger idx = 0; idx < cellCount; idx++) {
+        UICollectionViewCell *cell = sortedCells[idx];
+        cell.transform = CGAffineTransformMakeScale(0, 0);
+        [UIView animateWithDuration:singleAnimationDuration
+                              delay:interAnimationDelay * idx
+                            options:(UIViewAnimationOptions)0
+                         animations:^{
+                             cell.transform = CGAffineTransformIdentity;
+                         } completion:nil];
+    }
+}
+
+#pragma mark - UICollectionViewDataSource / UICollectionViewDelegate
+
+- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
+    CGFloat value = [_parentPieChartView.dataSource pieChartView:_parentPieChartView valueForSegmentAtIndex:indexPath.item];
+    NSString *title = [_parentPieChartView.dataSource pieChartView:_parentPieChartView titleForSegmentAtIndex:indexPath.item];
+    
+    ORKPieChartLegendCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"cell" forIndexPath:indexPath];
+    cell.tag = indexPath.item;
+    cell.titleLabel.text = title;
+    cell.titleLabel.font = _labelFont;
+    cell.dotView.backgroundColor = [_parentPieChartView colorForSegmentAtIndex:indexPath.item];
+    
+    cell.accessibilityLabel = title;
+    cell.accessibilityValue = [NSString stringWithFormat:@"%0.0f%%", (value < .01) ? 1 : value / _sumOfValues * 100];
+    
+    return cell;
+}
+
+- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
+    return [_parentPieChartView.dataSource numberOfSegmentsInPieChartView:_parentPieChartView];
+}
+
+- (CGSize)collectionView:(UICollectionView *)collectionView
+                  layout:(UICollectionViewLayout *)collectionViewLayout
+  sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
+    _sizingCell.titleLabel.text = [_parentPieChartView.dataSource pieChartView:_parentPieChartView titleForSegmentAtIndex:indexPath.item];
+    CGSize size = [_sizingCell.contentView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];
+    return size;
+}
+
+- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {
+    return 10.0;
+}
+
+- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section {
+    return 6.0;
+}
+
+@end

ResearchKit/Charts/ORKPieChartPieView.h

@@ -0,0 +1,57 @@
+/*
+ Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, James Cox.
+ 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:
+ 
+ 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 <UIKit/UIKit.h>
+
+
+@class ORKPieChartView;
+
+@interface ORKPieChartPieView : UIView
+
+@property (nonatomic) UIFont *percentageLabelFont;
+
+- (instancetype)initWithFrame:(CGRect)frame NS_UNAVAILABLE;
+
+- (instancetype)initWithParentPieChartView:(ORKPieChartView *)parentPieChartView NS_DESIGNATED_INITIALIZER;
+
+- (CGFloat)normalizeValues;
+
+- (void)updatePieLayers;
+
+- (void)updatePercentageLabels;
+
+- (void)updateColors;
+
+- (void)animateWithDuration:(NSTimeInterval)animationDuration;
+
+@end

ResearchKit/Charts/ORKPieChartPieView.m

@@ -0,0 +1,408 @@
+/*
+ Copyright (c) 2015, Apple Inc. All rights reserved.
+ Copyright (c) 2015, James Cox.
+ 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:
+ 
+ 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 "ORKPieChartPieView.h"
+#import "ORKPieChartView_Internal.h"
+#import "ORKHelpers.h"
+
+
+static const CGFloat OriginAngle = -M_PI_2;
+static const CGFloat PercentageLabelOffset = 10.0;
+static const CGFloat InterAnimationDelay = 0.05;
+
+@implementation ORKPieChartPieView {
+    __weak ORKPieChartView *_parentPieChartView;
+    
+    CAShapeLayer *_circleLayer;
+    NSMutableArray<NSNumber *> *_normalizedValues;
+    NSMutableArray<CAShapeLayer *> *_segmentLayers;
+    NSMutableArray<ORKPieChartSection *> *_pieSections;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+    ORKThrowMethodUnavailableException();
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+    self = [self initWithParentPieChartView:nil];
+    return self;
+}
+
+- (instancetype)initWithParentPieChartView:(ORKPieChartView *)parentPieChartView {
+    self = [super initWithFrame:CGRectZero];
+    if (self) {
+        _parentPieChartView = parentPieChartView;
+        self.translatesAutoresizingMaskIntoConstraints = NO;
+        
+        _circleLayer = [CAShapeLayer layer];
+        _circleLayer.fillColor = [UIColor clearColor].CGColor;
+        _circleLayer.strokeColor = [UIColor colorWithWhite:0.96 alpha:1.000].CGColor;
+        [self.layer addSublayer:_circleLayer];
+        
+        _normalizedValues = [NSMutableArray new];
+        _segmentLayers = [NSMutableArray new];
+        _pieSections = [NSMutableArray new];
+    }
+    return self;
+}
+
+- (void)setPercentageLabelFont:(UIFont *)percentageLabelFont {
+    _percentageLabelFont = percentageLabelFont;
+    for (ORKPieChartSection *pieSection in _pieSections) {
+        pieSection.label.font = percentageLabelFont;
+        [pieSection.label sizeToFit];
+    }
+    [self setNeedsLayout];
+}
+
+#pragma mark - Data Normalization
+
+- (CGFloat)normalizeValues {
+    [_normalizedValues removeAllObjects];
+    
+    CGFloat sumOfValues = 0;
+    NSInteger numberOfSegments = [_parentPieChartView.dataSource numberOfSegmentsInPieChartView:_parentPieChartView];
+    for (NSInteger idx = 0; idx < numberOfSegments; idx++) {
+        CGFloat value = [_parentPieChartView.dataSource pieChartView:_parentPieChartView valueForSegmentAtIndex:idx];
+        sumOfValues += value;
+    }
+    
+    for (NSInteger idx = 0; idx < numberOfSegments; idx++) {
+        CGFloat value = 0;
+        if (sumOfValues != 0) {
+            value = [_parentPieChartView.dataSource pieChartView:_parentPieChartView valueForSegmentAtIndex:idx] / sumOfValues;
+        }
+        [_normalizedValues addObject:@(value)];
+    }
+    return sumOfValues;
+}
+
+#pragma mark - Layout and drawing
+
+- (void)layoutSubviews {
+    [super layoutSubviews];
+    CGRect bounds = self.bounds;
+    CGFloat startAngle = OriginAngle;
+    CGFloat endAngle = startAngle + (2 * M_PI);
+    CGFloat outerRadius = bounds.size.height * 0.5;
+    CGFloat labelHeight = [@"100%" boundingRectWithSize:CGRectInfinite.size
+                                                options:(NSStringDrawingOptions)0
+                                             attributes:@{NSFontAttributeName : _percentageLabelFont}
+                                                context:nil].size.height;
+    CGFloat innerRadius = outerRadius - (labelHeight + PercentageLabelOffset);
+    CGFloat targetRadius = _parentPieChartView.showsPercentageLabels ? innerRadius : outerRadius;
+    CGFloat lineWidth = MIN(_parentPieChartView.lineWidth, targetRadius);
+    _circleLayer.lineWidth = lineWidth;
+    CGFloat drawingRadius = targetRadius - (lineWidth * 0.5);
+    
+    if (!_parentPieChartView.drawsClockwise) {
+        startAngle = 3 * M_PI_2;
+        endAngle = -M_PI_2;
+    }
+    UIBezierPath *circularArcBezierPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(CGRectGetMidX(bounds),
+                                                                                            CGRectGetMidY(bounds))
+                                                                         radius:drawingRadius
+                                                                     startAngle:startAngle
+                                                                       endAngle:endAngle
+                                                                      clockwise:_parentPieChartView.drawsClockwise];
+    
+    _circleLayer.path = circularArcBezierPath.CGPath;
+    
+    [self layoutPieChartLayers];
+    if (_parentPieChartView.showsPercentageLabels) {
+        [self layoutPercentageLabelsWithRadius:innerRadius];
+    }
+}
+
+- (void)updatePieLayers {
+    [_segmentLayers makeObjectsPerformSelector:@selector(removeFromSuperlayer)];
+    [_segmentLayers removeAllObjects];
+    
+    CGFloat cumulativeValue = 0;
+    NSInteger numberOfSegments = [_parentPieChartView.dataSource numberOfSegmentsInPieChartView:_parentPieChartView];
+    for (NSInteger idx = 0; idx < numberOfSegments; idx++) {
+        
+        CAShapeLayer *segmentLayer = [CAShapeLayer layer];
+        segmentLayer.fillColor = [[UIColor clearColor] CGColor];
+        segmentLayer.frame = _circleLayer.bounds;
+        segmentLayer.path = _circleLayer.path;
+        segmentLayer.lineWidth = _circleLayer.lineWidth;
+        segmentLayer.strokeColor = [_parentPieChartView colorForSegmentAtIndex:idx].CGColor;
+        CGFloat value = _normalizedValues[idx].floatValue;
+        
+        if (value != 0) {
+            if (idx == 0) {
+                segmentLayer.strokeStart = 0.0;
+            } else {
+                segmentLayer.strokeStart = cumulativeValue;
+            }
+            
+            segmentLayer.strokeEnd = cumulativeValue;
+            [_circleLayer addSublayer:segmentLayer];
+            [_segmentLayers addObject:segmentLayer];
+            segmentLayer.strokeEnd = cumulativeValue + value;
+        }
+        cumulativeValue += value;
+    }
+}
+
+- (void)updatePercentageLabels {
+    for (ORKPieChartSection *pieSection in _pieSections) {
+        [pieSection.label removeFromSuperview];
+    }
+    [_pieSections removeAllObjects];
+    
+    if (_parentPieChartView.showsPercentageLabels) {
+        CGFloat cumulativeValue = 0;
+        NSInteger numberOfSegments = [_parentPieChartView.dataSource numberOfSegmentsInPieChartView:_parentPieChartView];
+        for (NSInteger idx = 0; idx < numberOfSegments; idx++) {
+            CGFloat value = _normalizedValues[idx].floatValue;
+            
+            if (value != 0) {
+                
+                // Create a label
+                UILabel *label = [UILabel new];
+                label.text = [NSString stringWithFormat:@"%0.0f%%", (value < .01) ? 1 :value * 100];
+                label.font = _percentageLabelFont;
+                label.textColor = [_parentPieChartView colorForSegmentAtIndex:idx];
+                [label sizeToFit];
+                
+                // Only if there are no legends
+                label.isAccessibilityElement = ![_parentPieChartView.dataSource respondsToSelector:@selector(pieChartView:titleForSegmentAtIndex:)];
+                
+                // Calculate the angle to the centre of this segment in radians
+                CGFloat angle = 0;
+                if (_parentPieChartView.drawsClockwise) {
+                    angle = (value / 2 + cumulativeValue) * M_PI * 2;
+                } else {
+                    angle = (value / 2 + cumulativeValue) * - M_PI * 2;
+                }
+                
+                cumulativeValue += value;
+                ORKPieChartSection *pieSection = [[ORKPieChartSection alloc] initWithLabel:label angle:angle];
+                [_pieSections addObject:pieSection];
+                [self addSubview:label];
+            }
+        }
+    }
+}
+
+- (void)updateColors {
+    NSInteger numberOfSegments = [_parentPieChartView.dataSource numberOfSegmentsInPieChartView:_parentPieChartView];
+    for (NSInteger idx = 0; idx < numberOfSegments; idx++) {
+        if (_segmentLayers.count == numberOfSegments) {
+            CAShapeLayer *segmentLayer = _segmentLayers[idx];
+            segmentLayer.strokeColor = [_parentPieChartView colorForSegmentAtIndex:idx].CGColor;
+        }
+        if (_pieSections.count == numberOfSegments) {
+            ORKPieChartSection *pieSection = _pieSections[idx];
+            UILabel *label = pieSection.label;
+            label.textColor = [_parentPieChartView colorForSegmentAtIndex:idx];
+        }
+    }
+}
+
+- (void)layoutPieChartLayers {
+    NSInteger numberOfSegments = [_parentPieChartView.dataSource numberOfSegmentsInPieChartView:_parentPieChartView];
+    for (NSInteger idx = 0; idx < numberOfSegments; idx++) {
+        CAShapeLayer *segmentLayer = _segmentLayers[idx];
+        segmentLayer.frame = _circleLayer.bounds;
+        segmentLayer.path = _circleLayer.path;
+        segmentLayer.lineWidth = _circleLayer.lineWidth;
+    }
+}
+
+- (void)layoutPercentageLabelsWithRadius:(CGFloat)pieRadius {
+    CGFloat cumulativeValue = 0;
+    NSInteger numberOfSegments = [_parentPieChartView.dataSource numberOfSegmentsInPieChartView:_parentPieChartView];
+    for (NSInteger idx = 0; idx < numberOfSegments; idx++) {
+        CGFloat value = _normalizedValues[idx].floatValue;
+        if (value != 0) {
+            // Create a label
+            ORKPieChartSection *pieSection = _pieSections[idx];
+            UILabel *label = pieSection.label;
+            
+            // Calculate the angle to the centre of this segment in radians
+            CGFloat angle = (value / 2 + cumulativeValue) * M_PI * 2;
+            if (!_parentPieChartView.drawsClockwise) {
+                angle = (value / 2 + cumulativeValue) * - M_PI * 2;
+            }
+            
+            label.center = [self percentageLabel:label calculateCenterForAngle:angle pieRadius:pieRadius];
+            cumulativeValue += value;
+        }
+    }
+    [self adjustIntersectionsOfPercentageLabels:_pieSections pieRadius:pieRadius];
+}
+
+- (CGPoint)percentageLabel:(UILabel *)label calculateCenterForAngle:(CGFloat)angle pieRadius:(CGFloat)pieRadius {
+    // Calculate the desired distance from the circle's centre.
+    const CGFloat offset = 10;
+    CGFloat length = pieRadius + offset;
+    
+    // Calculate x and y coordinates for the point at this distance at the specified angle.
+    CGSize size = self.bounds.size;
+    CGFloat cosine = cos(angle + OriginAngle);
+    CGFloat sine = sin(angle + OriginAngle);
+    CGFloat x = cosine * length + size.width / 2;
+    CGFloat y = sine *  length + size.height / 2;
+    
+    // Offset (x,y) to normalise the spacing from the circle's centre to the intersection with the label's frame rather than its centre.
+    CGSize labelSize = [label systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];
+    CGFloat xIn = cosine * labelSize.width / 2;
+    CGFloat yIn = sine * labelSize.height / 2;
+    x += xIn;
+    y += yIn;
+    
+    return  CGPointMake(x, y);
+}
+
+- (void)adjustIntersectionsOfPercentageLabels:(NSArray<ORKPieChartSection *> *)pieSections pieRadius:(CGFloat)pieRadius {
+    if (pieSections.count == 0) {
+        return;
+    }
+    // Adjust labels while we have intersections
+    BOOL intersections = YES;
+    // We alternate directions in each iteration
+    BOOL shiftClockwise = NO;
+    CGFloat rotateDirection = _parentPieChartView.drawsClockwise ? 1 : -1;
+    // We use totalAngle to prevent from infinite loop
+    CGFloat totalAngle = 0;
+    while (intersections) {
+        intersections = NO;
+        shiftClockwise = !shiftClockwise;
+        
+        if (shiftClockwise) {
+            for (NSUInteger idx = 0; idx < (pieSections.count - 1); idx++) {
+                // Prevent from infinite loop
+                if (!idx) {
+                    totalAngle += 0.01;
+                    if (totalAngle >= 2 * M_PI) {
+                        return;
+                    }
+                }
+                ORKPieChartSection *pieLabel  = pieSections[idx];
+                ORKPieChartSection *nextPieLabel = pieSections[(idx + 1)];
+                if ([self shiftSectionLabel:nextPieLabel fromSectionLabel:pieLabel direction:rotateDirection pieRadius:pieRadius]) {
+                    intersections = YES;
+                }
+            }
+        } else {
+            for (NSInteger idx = pieSections.count - 1; idx > 0; idx--) {
+                ORKPieChartSection *pieLabel = pieSections[idx];
+                ORKPieChartSection *nextPieLabel = pieSections[idx - 1];
+                if ([self shiftSectionLabel:nextPieLabel fromSectionLabel:pieLabel direction:-rotateDirection pieRadius:pieRadius]) {
+                    intersections = YES;
+                }
+            }
+        }
+        
+        // Adjust space between last and first element
+        ORKPieChartSection *firstPieLabel = pieSections.firstObject;
+        ORKPieChartSection *lastPieLabel = pieSections.lastObject;
+        UILabel *firstLabel = firstPieLabel.label;
+        UILabel *lastLabel = lastPieLabel.label;
+        if (CGRectIntersectsRect(lastLabel.frame, firstLabel.frame)) {
+            CGFloat firstLabelAngle = firstPieLabel.angle;
+            CGFloat lastLabelAngle = lastPieLabel.angle;
+            firstLabelAngle += rotateDirection * 0.01;
+            lastLabelAngle -= rotateDirection * 0.01;
+            firstPieLabel.angle = firstLabelAngle;
+            lastPieLabel.angle = lastLabelAngle;
+        }
+    }
+}
+
+- (BOOL)shiftSectionLabel:(ORKPieChartSection *)nextPieSection
+         fromSectionLabel:(ORKPieChartSection *)fromPieSection
+                direction:(CGFloat)direction
+                pieRadius:(CGFloat)pieRadius {
+    CGFloat shiftStep = 0.01;
+    UILabel *label = fromPieSection.label;
+    UILabel *nextLabel = nextPieSection.label;
+    if (CGRectIntersectsRect(label.frame, nextLabel.frame)) {
+        CGFloat nextLabelAngle = nextPieSection.angle;
+        nextLabelAngle += direction * shiftStep;
+        nextPieSection.angle = nextLabelAngle;
+        nextLabel.center = [self percentageLabel:nextLabel calculateCenterForAngle:nextLabelAngle pieRadius:pieRadius];
+        return YES;
+    }
+    return NO;
+}
+
+- (void)animateWithDuration:(NSTimeInterval)animationDuration {
+    NSUInteger numberOfSegmentLayers  = _segmentLayers.count;
+    NSTimeInterval interAnimationDelay = InterAnimationDelay;
+    NSTimeInterval singleAnimationDuration = animationDuration - (interAnimationDelay * (numberOfSegmentLayers - 1));
+    if (singleAnimationDuration < 0) {
+        interAnimationDelay = 0;
+        singleAnimationDuration = animationDuration;
+    }
+    
+    CGFloat cumulativeValue = 0;
+    for (NSInteger idx = 0; idx < numberOfSegmentLayers ; idx++) {
+        CAShapeLayer *segmentLayer = _segmentLayers[idx];
+        CGFloat value = _normalizedValues[idx].floatValue;
+        CABasicAnimation *strokeAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
+        strokeAnimation.fromValue = @(segmentLayer.strokeStart);
+        strokeAnimation.toValue = @(cumulativeValue + value);
+        strokeAnimation.duration = animationDuration;
+        strokeAnimation.removedOnCompletion = NO;
+        strokeAnimation.fillMode = kCAFillModeForwards;
+        strokeAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
+        [segmentLayer addAnimation:strokeAnimation forKey:@"strokeAnimation"];
+        
+        if (_parentPieChartView.showsPercentageLabels && _pieSections.count == numberOfSegmentLayers) {
+            ORKPieChartSection *pieSection = _pieSections[idx];
+            UILabel *label = pieSection.label;
+            label.alpha = 0;
+            [UIView animateWithDuration:singleAnimationDuration
+                                  delay:interAnimationDelay * idx
+                                options:(UIViewAnimationOptions)0
+                             animations:^{
+                                 label.alpha = 1.0;
+                             }
+                             completion:nil];
+        }
+        
+        cumulativeValue += value;
+    }
+}
+
+#pragma mark - Accessibility
+
+- (NSArray<id> *)accessibilityElements {
+    return _pieSections;
+}
+
+@end