弹出：
CAKeyframeAnimation *animation = [CAKeyframeAnimationanimationWithKeyPath:@"transform.scale"];
animation.values =@[@(0.01),@(1.2),@(0.9),@(1)];
animation.keyTimes = @[@(0),@(0.4),@(0.6),@(1)];
animation.timingFunctions =@[[CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionLinear], [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionLinear], [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseOut]];
animation.duration = 0.5;
animation.delegate = self;
[popImageView1.layer addAnimation:animationforKey:@"bouce"];
点击消失：
CAKeyframeAnimation *animation = [CAKeyframeAnimationanimationWithKeyPath:@"transform.scale"];
animation.values = @[@(1),@(1.2),@(0.01)];
animation.keyTimes = @[@(0),@(0.4),@(1)];
animation.timingFunctions =@[[CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseInEaseOut], [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseOut]];
animation.duration = 0.35;
animation.delegate = self;
[button.superview.layeraddAnimation:animationforKey:@"bounce"];
button.superview.transform =CGAffineTransformMakeScale(0.001,0.001);
若要区分动画，则可以这样 （已测 可以达到效果chenyong） 0122 (这样貌似也有点问题，偶尔会崩溃好像，可以设置一个全局int值 ，来区分动画)
[animation setValue:@"throbUp" forKey:@"animationID"];
转载自：/questions/1255086/how-to-identify-caanimation-within-the-animationdidstop-delegate
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