Swift-use cakeyframeanimation for keyframe animations

1,cakeyframeanimation Introduction

Cakeyframeanimation can implement key-frame animations, which can be used to animate a property according to a string of values, as if it were a frame-by-frame production.
2, using the sample (set five key coordinates, the picture is moved by key points in turn)

123456789101112131415161718192021

let animation = CAKeyframeAnimation(keyPath: "position")//设置5个位置点let p1 = CGPointMake(0.0, 0.0)let p2 = CGPointMake(300, 0.0)let p3 = CGPointMake(0.0, 400)let p4 = CGPointMake(300, 400)let p5 = CGPointMake(150, 200)//赋值animation.values = [NSValue(CGPoint: p1), NSValue(CGPoint: p2),    NSValue(CGPoint: p3), NSValue(CGPoint: p4), NSValue(CGPoint: p5)]//每个动作的时间百分比animation.keyTimes = [NSNumber(float: 0.0), NSNumber(float: 0.4),    NSNumber(float: 0.6), NSNumber(float: 0.8), NSNumber(float: 1.0), ]animation.delegate = selfanimation.duration = 6.0self.imageView.layer.addAnimation(animation, forKey: "Image-Move")

3, you can set the animation agent, listen to start and end action

123456789

animation.delegate = selfoverride func animationDidStart(anim: CAAnimation!) {    println("动画开始")}override func animationDidStop(anim: CAAnimation!, finished flag: Bool) {    println("动画结束")}

Swift-use cakeyframeanimation for keyframe animations