feat: upgrade framework version

feat: Change some private keywords, to be Swift 3 compatible

.github/issue_template.md

@@ -0,0 +1,23 @@
+⚠️ Please fill out this template when filing an issue.
+
+### What did you do?
+
+*Please replace this with what you did.*
+
+### What did you expect to happen?
+
+*Please replace this with what you expected to happen.*
+
+### What happened instead?
+
+*Please replace this with of what happened instead.*  
+
+### Steps to reproduce the behavior
+
+*Please replace this with the steps to reproduce the behavior.*
+
+### SkeletonView Environment
+
+**SkeletonView version:**
+**Xcode version:**
+**Swift version:**

.travis.yml

@@ -0,0 +1,6 @@
+language: objective-c
+osx_image: xcode9
+script:
+  - xcodebuild -project SkeletonView.xcodeproj -target SkeletonView-iOS -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 7,OS=11'
+  - xcodebuild -project SkeletonView.xcodeproj -target SkeletonViewExample -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 7,OS=11'
+after_success:

Configs/SkeletonView.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
+	<string>1.0.3</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

Configs/SkeletonViewExampleInfo.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
+	<string>1.0.3</string>
 	<key>CFBundleVersion</key>
 	<string>1</string>
 	<key>LSRequiresIPhoneOS</key>

Package.swift

@@ -1,21 +0,0 @@
-// swift-tools-version:4.0
-// The swift-tools-version declares the minimum version of Swift required to build this package.
-
-import PackageDescription
-
-let package = Package(
-    name: "SkeletonView",
-    products: [
-        .library(
-            name: "SkeletonView",
-            targets: ["SkeletonView"]),
-    ],
-    targets: [
-        .target(
-            name: "SkeletonView",
-            dependencies: []),
-        .testTarget(
-            name: "SkeletonViewTests",
-            dependencies: ["SkeletonView"]),
-    ]
-)

README.md

@@ -1,6 +1,9 @@
 ![](Assets/header.jpg)
 
 <p align="center">
+    <a href="https://travis-ci.org/Juanpe/SkeletonView">
+      <img src="https://img.shields.io/travis/Juanpe/SkeletonView.svg">
+    </a>
     <img src="https://img.shields.io/badge/Swift-4.0-orange.svg" />
     <a href="https://cocoapods.org/pods/SkeletonView">
         <img src="https://img.shields.io/cocoapods/v/SkeletonView.svg" alt="CocoaPods" />
@@ -8,14 +11,39 @@
     <a href="https://github.com/Carthage/Carthage">
         <img src="https://img.shields.io/badge/carthage-compatible-4BC51D.svg?style=flat" alt="Carthage" />
     </a>
-    <a href="https://twitter.com/juanpe_catalan">
-        <img src="https://img.shields.io/badge/contact-@juanpe_catalan-blue.svg?style=flat" alt="Twitter: @juanpe_catalan" />
+    <a href="https://twitter.com/JuanpeCatalan">
+        <img src="https://img.shields.io/badge/contact-@JuanpeCatalan-blue.svg?style=flat" alt="Twitter: @JuanpeCatalan" />
     </a>
     <a href="https://opensource.org/licenses/MIT">
-  <img src="https://img.shields.io/badge/License-MIT-yellow.svg" alt="License" />
-</a>
+      <img src="https://img.shields.io/badge/License-MIT-yellow.svg" alt="License" />
+    </a>
+    <a href="https://twitter.com/intent/tweet?text=Wow%20This%20library%20is%20awesome:&url=https%3A%2F%2Fgithub.com%2FJuanpe%2FSkeletonView">
+      <img src="https://img.shields.io/twitter/url/https/github.com/Juanpe/SkeletonView.svg?style=social" alt="License" />
+    </a>
 </p>
 
+Today almost all apps have async processes, such as Api requests, long running processes, etc. And while the processes are working, usually developers place a loading view to show users that something is going on.
+
+```SkeletonView``` has been conceived to address this need, an elegant way to show users that something is happening and also prepare them to which contents he is waiting.
+
+Enjoy it! 🙂
+
+* [Features](#-features)
+* [Requirements](#-supported-os--sdk-versions)
+* [Example Project](#-example)
+* [Installation](#-installation)
+  * [Cocoapods](#using-cocoapods)
+  * [Carthage](#using-carthage)
+* [How to use](#-how-to-use)
+  * [Collections](#-collections)
+  * [Multiline text](#-multiline-text)
+  * [Custom colors](#-custom-colors)
+  * [Custom animations](#-custom-animations)
+  * [Hierarchy](#-hierarchy)
+* [Documentation](#-documentation)
+* [Contributed](#-contributed)
+* [Author](#-author)
+* [License](#-license)
 
 
 ## 🌟 Features
@@ -31,17 +59,7 @@
 ### 📋 Supported OS & SDK Versions
 
 * iOS 9.0+
-* Swift 4
-
-### 🎤 Introduction
-
-Today almost all apps have async process,  as API requests, long process, etc. And while the process is working, normally developers put a loading to show users that something is happening.
-
-For this reason born ```SkeletonView```, an elegant way to show users that something is happening and also prepare users to which contents he is waiting.
-
-This library try to be a very easy library, and isolated from your code.
-
-*Project generated with [SwiftPlate](https://github.com/JohnSundell/SwiftPlate)*
+* Swift 4 (Swift 3 compatible)
 
 ### 🔮 Example
 
@@ -144,7 +162,7 @@ public protocol SkeletonTableViewDataSource: UITableViewDataSource {
     func collectionSkeletonView(_ skeletonView: UITableView, cellIdenfierForRowAt indexPath: IndexPath) -> ReusableCellIdentifier
 }
 ```
-As you can see, this protocol inherits from ```UITableViewDataSource``, so you can replace this protocol with the skeleton protocol.
+As you can see, this protocol inherits from ```UITableViewDataSource```, so you can replace this protocol with the skeleton protocol.
 
 This protocol has a default implementation:
 
@@ -185,7 +203,9 @@ You can decide which color the skeleton is tinted with. You only need to pass as
 
 **Using solid colors**
 ``` swift
-view.showSkeleton(usingColor: UIColor.midnightBlue) // Solid
+view.showSkeleton(usingColor: UIColor.gray) // Solid
+// or
+view.showSkeleton(usingColor: UIColor(red: 25.0, green: 30.0, blue: 255.0, alpha: 1.0))
 ```
 **Using gradients**
 ``` swift
@@ -193,7 +213,9 @@ let gradient = SkeletonGradient(baseColor: UIColor.midnightBlue)
 view.showGradientSkeleton(usingGradient: gradient) // Gradient
 ```
 
-```SkeletonView``` features 20 flat colors 🤙🏼:
+Besides, ```SkeletonView``` features 20 flat colors 🤙🏼
+
+```UIColor.turquoise, UIColor.greenSea, UIColor.sunFlower, UIColor.flatOrange  ...```
 
 ![](Assets/flatcolors.png)
 ###### Image captured from website [https://flatuicolors.com](https://flatuicolors.com)
@@ -217,11 +239,38 @@ You can call the function like this:
 view.showAnimatedSkeleton { (layer) -> CAAnimation in
   let animation = CAAnimation()
   // Customize here your animation
-  
+
   return animation
 }
 ```
 
+**NEW** It's available ```SkeletonAnimationBuilder```. It's a builder to make ```SkeletonLayerAnimation```.
+
+Today, you can create **sliding animations** for gradients, deciding the **direction** and setting the **duration** of the animation (default = 1.5s).
+
+```swift
+// func makeSlidingAnimation(withDirection direction: GradientDirection, duration: CFTimeInterval = 1.5) -> SkeletonLayerAnimation
+
+let animation = SkeletonAnimationBuilder().makeSlidingAnimation(withDirection: .leftToRight)
+view.showAnimatedGradientSkeleton(usingGradient: gradient, animation: animation)
+
+```
+
+```GradientDirection``` is an enum, with this cases:
+
+|  Direction | Preview
+|------- | -------
+| .leftRight | ![](Assets/sliding_left_to_right.gif)
+| .rightLeft | ![](Assets/sliding_right_to_left.gif)
+| .topBottom | ![](Assets/sliding_top_to_bottom.gif)  
+| .bottomTop | ![](Assets/sliding_bottom_to_top.gif)
+| .topLeftBottomRight | ![](Assets/sliding_topLeft_to_bottomRight.gif)
+| .bottomRightTopLeft | ![](Assets/sliding_bottomRight_to_topLeft.gif)
+
+> **😉 TRICK!**
+Exist another way to create sliding animations, just using this shortcut:
+>>```let animation = GradientDirection.leftToRight.slidingAnimation()```
+
 ### 👨‍👧‍👦 Hierarchy
 
 Since ```SkeletonView``` is recursive, and we want skeleton to be very efficient, we want to stop recursion as soon as possible. For this reason, you must set the container view as `Skeletonable`, because Skeleton will stop looking for `skeletonable` subviews as soon as a view is not Skeletonable, breaking then the recursion.
@@ -250,9 +299,11 @@ This is an open source project, so feel free to contribute. How?
 
 See [all contributors](https://github.com/Juanpe/SkeletonView/graphs/contributors)
 
+###### Project generated with [SwiftPlate](https://github.com/JohnSundell/SwiftPlate)
+
 ## 👨🏻‍💻 Author
 [1.1]: http://i.imgur.com/tXSoThF.png
-[1]: http://www.twitter.com/juanpe_catalan
+[1]: http://www.twitter.com/JuanpeCatalan
 
 * Juanpe Catalán [![alt text][1.1]][1]
 
@@ -261,7 +312,7 @@ See [all contributors](https://github.com/Juanpe/SkeletonView/graphs/contributor
 ```
 MIT License
 
-Copyright (c) 2017 swift-code
+Copyright (c) 2017 Juanpe Catalán
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

SkeletonView.podspec

@@ -1,15 +1,16 @@
 Pod::Spec.new do |s|
   s.name         = "SkeletonView"
-  s.version      = "1.0"
-  s.summary      = ""
+  s.version      = "1.0.3"
+  s.summary      = "An elegant way to show users that something is happening and also prepare them to which contents he is waiting"
   s.description  = <<-DESC
-    Your description here.
+  Today almost all apps have async processes, as API requests, long runing processes, etc. And while the processes are working, usually developers place a loading view to show users that something is going on.
+  SkeletonView has been conceived to address this need, an elegant way to show users that something is happening and also prepare them to which contents he is waiting.
   DESC
-  s.homepage     = ""
+  s.homepage     = "https://github.com/Juanpe/SkeletonView"
   s.license      = { :type => "MIT", :file => "LICENSE" }
   s.author             = { "Juanpe Catalán" => "juanpecm@gmail.com" }
-  s.social_media_url   = ""
+  s.social_media_url   = "https://twitter.com/JuanpeCatalan"
   s.ios.deployment_target = "9.0"
-  s.source       = { :git => ".git", :tag => s.version.to_s }
+  s.source       = { :git => "https://github.com/Juanpe/SkeletonView.git", :tag => s.version.to_s }
   s.source_files  = "Sources/**/*"
 end

SkeletonView.xcodeproj/project.pbxproj

@@ -8,6 +8,7 @@
 
 /* Begin PBXBuildFile section */
 		8933C7851EB5B820000D00A4 /* SkeletonView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8933C7841EB5B820000D00A4 /* SkeletonView.swift */; };
+		F51DE1091FBF70A70037919A /* SkeletonAnimationBuilder.swift in Sources */ = {isa = PBXBuildFile; fileRef = F51DE1081FBF70A70037919A /* SkeletonAnimationBuilder.swift */; };
 		F5307E2C1FAF6BC900EE67C5 /* SkeletonGradient.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5307E2B1FAF6BC900EE67C5 /* SkeletonGradient.swift */; };
 		F5307E2E1FB0E5E400EE67C5 /* UIView+Frame.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5307E2D1FB0E5E400EE67C5 /* UIView+Frame.swift */; };
 		F5307E301FB0EC9D00EE67C5 /* SkeletonDefaultConfig.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5307E2F1FB0EC9D00EE67C5 /* SkeletonDefaultConfig.swift */; };
@@ -15,6 +16,8 @@
 		F5307E371FB1076E00EE67C5 /* SkeletonUITableViewDataSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5307E361FB1076E00EE67C5 /* SkeletonUITableViewDataSource.swift */; };
 		F5307E391FB1078E00EE67C5 /* SkeletonUICollectionViewDataSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5307E381FB1078E00EE67C5 /* SkeletonUICollectionViewDataSource.swift */; };
 		F5307E3B1FB123C100EE67C5 /* ContainsMultilineText.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5307E3A1FB123C100EE67C5 /* ContainsMultilineText.swift */; };
+		F5307E411FB3B84500EE67C5 /* SkeletonView.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 52D6D97C1BEFF229002C0205 /* SkeletonView.framework */; };
+		F5307E421FB3B84500EE67C5 /* SkeletonView.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 52D6D97C1BEFF229002C0205 /* SkeletonView.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		F56B94461FAE20AF0095662F /* PrepareForSkeletonProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = F56B94451FAE20AF0095662F /* PrepareForSkeletonProtocol.swift */; };
 		F5F622411FAC6E31007C062A /* UIColor+Skeleton.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5F622401FAC6E31007C062A /* UIColor+Skeleton.swift */; };
 		F5F622431FAC81FD007C062A /* CALayer+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = F5F622421FAC81FD007C062A /* CALayer+Extensions.swift */; };
@@ -29,13 +32,37 @@
 		F5F899FA1FABA607002E8FDA /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = F5F899F81FABA607002E8FDA /* Main.storyboard */; };
 		F5F899FC1FABA607002E8FDA /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = F5F899FB1FABA607002E8FDA /* Assets.xcassets */; };
 		F5F899FF1FABA607002E8FDA /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = F5F899FD1FABA607002E8FDA /* LaunchScreen.storyboard */; };
-		F5F89A051FABA614002E8FDA /* SkeletonView.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 52D6D97C1BEFF229002C0205 /* SkeletonView.framework */; };
 /* End PBXBuildFile section */
 
+/* Begin PBXContainerItemProxy section */
+		F5307E431FB3B84500EE67C5 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 52D6D9731BEFF229002C0205 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 52D6D97B1BEFF229002C0205;
+			remoteInfo = "SkeletonView-iOS";
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		F5307E451FB3B84600EE67C5 /* Embed Frameworks */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+				F5307E421FB3B84500EE67C5 /* SkeletonView.framework in Embed Frameworks */,
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
 /* Begin PBXFileReference section */
 		52D6D97C1BEFF229002C0205 /* SkeletonView.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = SkeletonView.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		8933C7841EB5B820000D00A4 /* SkeletonView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SkeletonView.swift; sourceTree = "<group>"; };
 		AD2FAA261CD0B6D800659CF4 /* SkeletonView.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = SkeletonView.plist; sourceTree = "<group>"; };
+		F51DE1081FBF70A70037919A /* SkeletonAnimationBuilder.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SkeletonAnimationBuilder.swift; sourceTree = "<group>"; };
 		F5307E2B1FAF6BC900EE67C5 /* SkeletonGradient.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SkeletonGradient.swift; sourceTree = "<group>"; };
 		F5307E2D1FB0E5E400EE67C5 /* UIView+Frame.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIView+Frame.swift"; sourceTree = "<group>"; };
 		F5307E2F1FB0EC9D00EE67C5 /* SkeletonDefaultConfig.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SkeletonDefaultConfig.swift; sourceTree = "<group>"; };
@@ -73,7 +100,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				F5F89A051FABA614002E8FDA /* SkeletonView.framework in Frameworks */,
+				F5307E411FB3B84500EE67C5 /* SkeletonView.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -115,6 +142,7 @@
 				F5307E331FB1068500EE67C5 /* Collections */,
 				F5307E341FB106A500EE67C5 /* Extensions */,
 				F5307E351FB106BF00EE67C5 /* Helpers */,
+				F51DE1081FBF70A70037919A /* SkeletonAnimationBuilder.swift */,
 				F5307E2F1FB0EC9D00EE67C5 /* SkeletonDefaultConfig.swift */,
 				F5307E2B1FAF6BC900EE67C5 /* SkeletonGradient.swift */,
 				F5F899E81FAB9D2B002E8FDA /* SkeletonLayer.swift */,
@@ -230,10 +258,12 @@
 				F5F899EE1FABA607002E8FDA /* Sources */,
 				F5F899EF1FABA607002E8FDA /* Frameworks */,
 				F5F899F01FABA607002E8FDA /* Resources */,
+				F5307E451FB3B84600EE67C5 /* Embed Frameworks */,
 			);
 			buildRules = (
 			);
 			dependencies = (
+				F5307E441FB3B84500EE67C5 /* PBXTargetDependency */,
 			);
 			name = SkeletonViewExample;
 			productName = SkeletonViewExample;
@@ -252,10 +282,12 @@
 				TargetAttributes = {
 					52D6D97B1BEFF229002C0205 = {
 						CreatedOnToolsVersion = 7.1;
+						DevelopmentTeam = PTS5FAP7XL;
 						LastSwiftMigration = 0800;
 					};
 					F5F899F11FABA607002E8FDA = {
 						CreatedOnToolsVersion = 9.1;
+						DevelopmentTeam = PTS5FAP7XL;
 						ProvisioningStyle = Automatic;
 					};
 				};
@@ -320,6 +352,7 @@
 				F5307E3B1FB123C100EE67C5 /* ContainsMultilineText.swift in Sources */,
 				F5F899E91FAB9D2B002E8FDA /* SkeletonLayer.swift in Sources */,
 				F5307E2E1FB0E5E400EE67C5 /* UIView+Frame.swift in Sources */,
+				F51DE1091FBF70A70037919A /* SkeletonAnimationBuilder.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -335,6 +368,14 @@
 		};
 /* End PBXSourcesBuildPhase section */
 
+/* Begin PBXTargetDependency section */
+		F5307E441FB3B84500EE67C5 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 52D6D97B1BEFF229002C0205 /* SkeletonView-iOS */;
+			targetProxy = F5307E431FB3B84500EE67C5 /* PBXContainerItemProxy */;
+		};
+/* End PBXTargetDependency section */
+
 /* Begin PBXVariantGroup section */
 		F5F899F81FABA607002E8FDA /* Main.storyboard */ = {
 			isa = PBXVariantGroup;
@@ -467,8 +508,10 @@
 			buildSettings = {
 				APPLICATION_EXTENSION_API_ONLY = YES;
 				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				DEFINES_MODULE = YES;
+				DEVELOPMENT_TEAM = PTS5FAP7XL;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
@@ -490,8 +533,10 @@
 			buildSettings = {
 				APPLICATION_EXTENSION_API_ONLY = YES;
 				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				DEFINES_MODULE = YES;
+				DEVELOPMENT_TEAM = PTS5FAP7XL;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
@@ -510,6 +555,7 @@
 		F5F89A021FABA607002E8FDA /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
@@ -518,6 +564,7 @@
 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = PTS5FAP7XL;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = "$(SRCROOT)/Configs/SkeletonViewExampleInfo.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
@@ -533,6 +580,7 @@
 		F5F89A031FABA607002E8FDA /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
@@ -541,6 +589,7 @@
 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = PTS5FAP7XL;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = "$(SRCROOT)/Configs/SkeletonViewExampleInfo.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;

Sources/Extensions/UIView+IBInspectable.swift

@@ -44,7 +44,7 @@ extension UIView {
         set { objc_setAssociatedObject(self, &AssociatedKeys.status, newValue, AssociationPolicy.retain.objc) }
     }
 
-    private var skeletonable: Bool! {
+    fileprivate var skeletonable: Bool! {
         get { return objc_getAssociatedObject(self, &AssociatedKeys.skeletonable) as? Bool ?? false }
         set { objc_setAssociatedObject(self, &AssociatedKeys.skeletonable, newValue, AssociationPolicy.retain.objc) }
     }

Sources/SkeletonAnimationBuilder.swift

@@ -0,0 +1,85 @@
+//
+//  SkeletonAnimationBuilder.swift
+//  SkeletonView-iOS
+//
+//  Created by Juanpe Catalán on 17/11/2017.
+//  Copyright © 2017 SkeletonView. All rights reserved.
+//
+
+import UIKit
+
+typealias GradientAnimationPoint = (from: CGPoint, to: CGPoint)
+
+public enum GradientDirection {
+    case leftRight
+    case rightLeft
+    case topBottom
+    case bottomTop
+    case topLeftBottomRight
+    case bottomRightTopLeft
+    
+    public func slidingAnimation(duration: CFTimeInterval = 1.5) -> SkeletonLayerAnimation {
+        return SkeletonAnimationBuilder().makeSlidingAnimation(withDirection: self, duration: duration)
+    }
+    
+    var startPoint: GradientAnimationPoint {
+        switch self {
+        case .leftRight:
+            return (from: CGPoint(x:-1, y:0.5), to: CGPoint(x:1, y:0.5))
+        case .rightLeft:
+            return (from: CGPoint(x:1, y:0.5), to: CGPoint(x:-1, y:0.5))
+        case .topBottom:
+            return (from: CGPoint(x:0.5, y:-1), to: CGPoint(x:0.5, y:1))
+        case .bottomTop:
+            return (from: CGPoint(x:0.5, y:1), to: CGPoint(x:0.5, y:-1))
+        case .topLeftBottomRight:
+            return (from: CGPoint(x:-1, y:-1), to: CGPoint(x:1, y:1))
+        case .bottomRightTopLeft:
+            return (from: CGPoint(x:1, y:1), to: CGPoint(x:-1, y:-1))
+        }
+    }
+    
+    var endPoint: GradientAnimationPoint {
+        switch self {
+        case .leftRight:
+            return (from: CGPoint(x:0, y:0.5), to: CGPoint(x:2, y:0.5))
+        case .rightLeft:
+            return ( from: CGPoint(x:2, y:0.5), to: CGPoint(x:0, y:0.5))
+        case .topBottom:
+            return ( from: CGPoint(x:0.5, y:0), to: CGPoint(x:0.5, y:2))
+        case .bottomTop:
+            return ( from: CGPoint(x:0.5, y:2), to: CGPoint(x:0.5, y:0))
+        case .topLeftBottomRight:
+            return ( from: CGPoint(x:0, y:0), to: CGPoint(x:2, y:2))
+        case .bottomRightTopLeft:
+            return ( from: CGPoint(x:2, y:2), to: CGPoint(x:0, y:0))
+        }
+    }
+}
+
+public class SkeletonAnimationBuilder {
+    
+    public init() {
+    }
+    
+    public func makeSlidingAnimation(withDirection direction: GradientDirection, duration: CFTimeInterval = 1.5) -> SkeletonLayerAnimation {
+        return { layer in
+            
+            let startPointAnim = CABasicAnimation(keyPath: #keyPath(CAGradientLayer.startPoint))
+            startPointAnim.fromValue = NSValue(cgPoint: direction.startPoint.from)
+            startPointAnim.toValue = NSValue(cgPoint: direction.startPoint.to)
+            
+            let endPointAnim = CABasicAnimation(keyPath: #keyPath(CAGradientLayer.endPoint))
+            endPointAnim.fromValue = NSValue(cgPoint: direction.endPoint.from)
+            endPointAnim.toValue = NSValue(cgPoint: direction.endPoint.to)
+            
+            let animGroup = CAAnimationGroup()
+            animGroup.animations = [startPointAnim, endPointAnim]
+            animGroup.duration = duration
+            animGroup.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)
+            animGroup.repeatCount = .infinity
+            
+            return animGroup
+        }
+    }
+}

Sources/SkeletonView.swift

@@ -64,14 +64,14 @@ extension UIView {
                         }
     }
     
-    private func startSkeletonLayerAnimationBlock(_ anim: SkeletonLayerAnimation? = nil) -> VoidBlock {
+    fileprivate func startSkeletonLayerAnimationBlock(_ anim: SkeletonLayerAnimation? = nil) -> VoidBlock {
         return {
             guard let layer = self.skeletonLayer else { return }
             layer.start(anim)
         }
     }
     
-    private var stopSkeletonLayerAnimationBlock: VoidBlock {
+    fileprivate var stopSkeletonLayerAnimationBlock: VoidBlock {
         return {
             guard let layer = self.skeletonLayer else { return }
             layer.stopAnimation()
@@ -105,7 +105,7 @@ extension UIStackView {
 
 extension UIView {
     
-    func addSkeletonLayer(withType type: SkeletonType, usingColors colors: [UIColor], animated: Bool, animation: SkeletonLayerAnimation? = nil) {
+    func addSkeletonLayer(withType type: SkeletonType, usingColors colors: [UIColor], gradientDirection direction: GradientDirection? = nil, animated: Bool, animation: SkeletonLayerAnimation? = nil) {
         self.skeletonLayer = SkeletonLayerFactory().makeLayer(withType: type, usingColors: colors, andHolder: self)
         layer.insertSublayer(skeletonLayer!.contentLayer, at: UInt32.max)
         if animated { skeletonLayer!.start(animation) }
@@ -116,6 +116,7 @@ extension UIView {
         guard isSkeletonActive,
             let layer = skeletonLayer else { return }
         layer.stopAnimation()
+        layer.removeLayer()
         skeletonLayer = nil
         status = .off
     }