CAKeyframeAnimation动画

Question

CAKeyframeAnimation动画结束有没有回调方法， 我看了一下它里面的头文件，没找到，有知道的么，

Answer 1

有delegate。

@interface NSObject (CAAnimationDelegate)

/* Called when the animation begins its active duration. */

- (void)animationDidStart:(CAAnimation *)anim;

/* Called when the animation either completes its active duration or
 * is removed from the object it is attached to (i.e. the layer). 'flag'
 * is true if the animation reached the end of its active duration
 * without being removed. */

- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag;

@End