配置动画时

[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(myAnimationStopped:finished:context:)];

并定义您的方法,如：

-(void)myAnimationStopped:(NSString *)animationID 
                 finished:(NSNumber *)finished
                  context:(void *)context {
   // fancy code here
}

当然不一定是自我和那种方法.