如何区分animationDidStop (键的值)和xCode (XCode)中的动画

Question

我有两个动画，我试图找出一个结束，然后做我想做的事情。我知道我可以区分使用valueForKey的动画，但我不知道确切的方式。

 func myanimation1() {
let pulse1 = CABasicAnimation(keyPath: "transform.scale")
        pulse.duration = 0.25
        pulse.fromValue = 1
        pulse.toValue = 1.05
        pulse.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
        pulse.autoreverses = true
        pulse.repeatCount = 2
       // pulse.isRemovedOnCompletion = false
      
        myImageView1.layer.add(pulse, forKey: myKey1)
}


 func myanimation2() {
let pulse2 = CABasicAnimation(keyPath: "transform.scale")
        pulse2.duration = 0.5
        pulse2.fromValue = 1.3
        pulse2.toValue = 1.5
        pulse2.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
        pulse2.autoreverses = true
        pulse2.repeatCount = 4
       // pulse2.isRemovedOnCompletion = false
      
        myImageView2.layer.add(pulse, forKey: myKey2)
}

现在，请怎样做这一点？

func animationDidStop(_ anim: CAAnimation, finished flag: Bool) {
        
        
    //if pulse1 ended { do something }

    //if pulse2 ended { do something else }

        
    }

任何帮助都非常感谢。

Answer 1

这里有一个非常酷的秘密:你可以使用键值编码给你的动画一个名字或其他标识。

let pulse2 = CABasicAnimation(keyPath: "transform.scale")
pulse2.setValue("pulse2", forKey:"name")

在委托方法中，您将接收动画，因此可以检查该名称：

if let name = anim.value(forKey:"name"), name == "pulse2" ...