利用Swift实现各类的CATransition动画详解

enum TransitionAnimType : Int {
case fade = 0,    //淡入淡出
push,      //推挤
reveal,      //揭开
moveIn,      //覆盖
cube,      //立方体
suckEffect,     //吮吸
oglFlip,     //翻转
rippleEffect,    //波纹
pageCurl,     //翻页
pageUnCurl,     //反翻页
cameraIrisHollowOpen,  //开镜头
cameraIrisHollowClose,  //关镜头
curlDown,     //下翻页
curlUp,      //上翻页
flipFromLeft,    //左翻转
flipFromRight,    //右翻转
ramdom      //随机
}

enum TransitionSubType : Int {
case top = 0,    //上
left,      //左
bottom,      //下
right,      //右
ramdom      //随机
}

enum TransitionCurve : Int {
case Default = 0,   //默认
EaseIn,      //缓进
EaseOut,     //缓出
EaseInEaseOut,    //缓进缓出
Linear,      //线性
Ramdom      //随机
}

/// 返回动画类型
private func animationType(animType: TransitionAnimType) -> String {
 /// 设置转场动画类型
 let animTypeArray = ["fade", "push", "reveal", "moveIn", "cube", "suckEffect", "oglFlip", "rippleEffect", "pageCurl", "pageUnCurl", "cameraIrisHollowOpen", "cameraIrisHollowClose", "curlDown", "curlUp", "flipFromLeft", "flipFromRight", "ramdom"]
 return objectFromDataSource(array: animTypeArray, index: animType.rawValue, isRamdom: (TransitionAnimType.ramdom == animType)) as! String
}

/// 返回动画方向
private func animationSubType(subType: TransitionSubType) -> String {
 let animSubTypeArray = [kCATransitionFromTop, kCATransitionFromLeft, kCATransitionFromBottom, kCATransitionFromRight]
 return objectFromDataSource(array: animSubTypeArray, index: subType.rawValue, isRamdom: (TransitionSubType.ramdom == subType)) as! String
}

/// 返回动画曲线
private func animationCurve(curve: TransitionCurve) -> String {
 let animCurveArray = [kCAMediaTimingFunctionDefault, kCAMediaTimingFunctionEaseIn, kCAMediaTimingFunctionEaseOut, kCAMediaTimingFunctionEaseInEaseOut, kCAMediaTimingFunctionLinear]
 return objectFromDataSource(array: animCurveArray, index: curve.rawValue, isRamdom: (TransitionCurve.Ramdom == curve)) as! String
}

/// 统一从数据返回对象
private func objectFromDataSource(array: Array<Any>, index: Int, isRamdom: Bool) -> AnyObject {
 let count = array.count
 let i = isRamdom ? Int(arc4random_uniform(UInt32(count))) : index

 return array[i] as AnyObject
}

func layerTransition(animTye: TransitionAnimType, subType: TransitionSubType, curve: TransitionCurve, duration: CGFloat, layer: CALayer) {
let key = "transition"
if layer.animation(forKey: key) != nil {
 layer.removeAnimation(forKey: key)
}
let transition = CATransition()

/// 动画时长
transition.duration = CFTimeInterval(duration)

/// 动画类型
transition.type = animationType(animType: animTye)

/// 动画方向
transition.subtype = animationSubType(subType: subType)

/// 缓动函数
transition.timingFunction = CAMediaTimingFunction(name: animationCurve(curve: curve))

/// 完成动画删除
transition.isRemovedOnCompletion = true

layer.add(transition, forKey: key)

}

layerTransition(animTye: .ramdom, subType: .ramdom, curve: .Ramdom, duration: 2.0, layer: (self.view.window?.layer)!)