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CALayer extension for using blocks instead of animation delegates
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| // | |
| // CALayerExtensions.swift | |
| // | |
| import QuartzCore | |
| internal typealias LayerAnimationBeginClosure = (CAAnimation) -> Void | |
| internal typealias LayerAnimationCompletionClosure = (CAAnimation, Bool) -> Void | |
| // MARK: LayerAnimationDelegate Class - | |
| private class LayerAnimationDelegate: NSObject, CAAnimationDelegate { | |
| var beginClosure: LayerAnimationBeginClosure? | |
| var completionClosure: LayerAnimationCompletionClosure? | |
| // MARK: - Protocol Implementations | |
| // MARK: CAAnimation (Informal) | |
| func animationDidStart(_ anim: CAAnimation) { | |
| guard let beginClosure = beginClosure else { return } | |
| beginClosure(anim) | |
| } | |
| func animationDidStop(_ anim: CAAnimation, finished flag: Bool) { | |
| guard let completionClosure = completionClosure else { return } | |
| completionClosure(anim, flag) | |
| } | |
| } | |
| // MARK: - CALayer Extension - | |
| extension CALayer { | |
| // MARK: - Conveniences for Adding Animations | |
| func add(animation: CAAnimation) { | |
| add(animation, forKey: nil) | |
| } | |
| func add(animation: CAAnimation,forKey key: String?, completionClosure: LayerAnimationCompletionClosure?) { | |
| add(animation: animation, forKey: key, beginClosure: nil, completionClosure: completionClosure) | |
| } | |
| func add(animation: CAAnimation, forKey key: String?, beginClosure: LayerAnimationBeginClosure?, completionClosure: LayerAnimationCompletionClosure?) { | |
| let animationDelegate = LayerAnimationDelegate() | |
| animationDelegate.beginClosure = beginClosure | |
| animationDelegate.completionClosure = completionClosure | |
| animation.delegate = animationDelegate | |
| add(animation, forKey: key) | |
| } | |
| func replace(animation: CAAnimation, forKey key: String) { | |
| replace(animation: animation, forKey: key, beginClosure: nil, completionClosure: nil) | |
| } | |
| func replace(animation: CAAnimation, forKey key: String, completionClosure: LayerAnimationCompletionClosure?) { | |
| replace(animation: animation, forKey: key, beginClosure: nil, completionClosure: completionClosure) | |
| } | |
| func replace(animation: CAAnimation, forKey key: String, beginClosure: LayerAnimationBeginClosure?, completionClosure: LayerAnimationCompletionClosure?) { | |
| removeAnimation(forKey: key) | |
| add(animation: animation, forKey: key, beginClosure: beginClosure, completionClosure: completionClosure) | |
| } | |
| } |
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