CAKeyframeAnimation关键帧动画
主要属性:
keyPath : 要设置的属性
path : 路径 可用UIBezierPath（设置了path，将忽略values）
duration : 动画时长
repeatCount : 重复次数
calculationMode : 动画计算方式
values：每一个关键帧（设置了path，将忽略values）
removedOnCompletion：执行完之后不删除动画
fillMode：执行完之后保存最新的状态
delegate：代理
let view = UILabel(frame: CGRectMake((self.view.frame.size.width - 200.0) / 2, 10.0, 200.0, 40.0))
self.view.addSubview(view)
view.text = "CAKeyframeAnimation动画"
view.backgroundColor = UIColor.lightGrayColor()
//
let layer = view.layer
// 位移
let keyAnimate = CAKeyframeAnimation(keyPath: "position")
// 设定关键帧
let value0 = NSValue(CGPoint: layer.position)
let value1 = NSValue(CGPoint: CGPointMake(layer.position.x, layer.position.y + 200))
let value2 = NSValue(CGPoint: CGPointMake(layer.position.x - 150, layer.position.y + 200))
let value3 = NSValue(CGPoint: CGPointMake(layer.position.x - 150, layer.position.y))
let value4 = NSValue(CGPoint: layer.position)
// 速度曲线
let tf0 = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
let tf1 = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
let tf2 = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)
let tf3 = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
keyAnimate.timingFunctions = [tf0, tf1, tf2, tf3]
// 每段执行的时间
keyAnimate.keyTimes = [0.0, 0.5, 0.6, 0.7, 1]
//
keyAnimate.values = [value0, value1, value2, value3, value4]
keyAnimate.autoreverses = false
keyAnimate.repeatCount = 3
keyAnimate.duration = 6.0
//
keyAnimate.delegate = self
//
layer.addAnimation(keyAnimate, forKey: "position")
// 代理方法
override func animationDidStart(anim: CAAnimation) {
print("开始")
}
override func animationDidStop(anim: CAAnimation, finished flag: Bool) {
print("结束")
}
let view3 = UILabel(frame: CGRectMake(10.0, (currentView.frame.origin.y + currentView.frame.size.height + 10.0), 60.0, 60.0))
self.view.addSubview(view3)
view3.text = "抖动"
view3.backgroundColor = UIColor.lightGrayColor()
//
let layer3 = view3.layer
// 抖动
let animation3 = CAKeyframeAnimation()
animation3.keyPath = "transform.rotation"
// (-M_PI_4 /90.0 * 5)表示-5度 。
let value31 = NSValue(CGPoint: CGPointMake(CGFloat(-M_PI_4 / 90.0 * 5.0), 0.0))
let value32 = NSValue(CGPoint: CGPointMake(CGFloat(M_PI_4 / 90.0 * 5.0), 0.0))
let value33 = NSValue(CGPoint: CGPointMake(CGFloat(-M_PI_4 / 90.0 * 5.0), 0.0))
animation3.values = [value31, value32, value33];
animation3.removedOnCompletion = false
animation3.fillMode = kCAFillModeForwards
animation3.duration = 0.2
animation3.repeatCount = MAXFLOAT
//
layer3.addAnimation(animation3, forKey: nil)
