iphone - animationDidStop 用于组动画

Question

我有一个群组动画，但我无法检测到何时点击 animationDidStop。我的代码示例:

[group setDelegate:self];
[view.layer addAnimation:group forKey:@"groupAnimation"];

你们谁知道我怎么知道群动画什么时候完成的？

Answer 1

您还需要设置 animationName 属性以匹配，并确保正确定义您的委托(delegate)函数:

CAAnimationGroup *group = [CAAnimationGroup animation];
group.duration = 2.0f;
group.delegate = self;
[group setValue:@"groupAnimation" forKey:@"animationName"];
[group setAnimations:[NSArray arrayWithObjects:myAnimation, myOtherAnimation, nil]];
[view.layer addAnimation:group forKey:@"groupAnimation"];

...

- (void)animationDidStop:(CAAnimation *)animation finished:(BOOL)finished
{
 if (finished)
 {
  NSString *animationName = [animation valueForKey:@"animationName"];
  if ([animationName isEqualToString:@"groupAnimation"])
  {
   // your groupAnimation has ended
  }
 }
}

请注意，对于组动画，组件动画上设置的委托(delegate)将被忽略。