Iphone 如何判断iOS中的简单png动画何时完成？

这是经典的动画，但我需要知道它何时真正结束。谢谢

UIImageView* campFireView = [[UIImageView alloc] initWithFrame:self.view.frame];
campFireView.frame = CGRectMake(255.0f,0.0f,512.0f,384.0f);

campFireView.animationImages = [NSArray arrayWithObjects:
  [UIImage imageNamed:@"wish_launch_up_low_00000.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00001.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00002.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00003.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00004.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00005.png"],
  ,nil];


  campFireView.animationDuration = 0;
  campFireView.animationRepeatCount = 1;

  [campFireView startAnimating];

  [self.view addSubview:campFireView];

---

检测UIImageView动画很痛苦。。但是如果你不介意混乱的话，你可以这样做

UIImageView* campFireView = [[UIImageView alloc] initWithFrame:self.view.frame];
campFireView.frame = CGRectMake(255.0f,0.0f,512.0f,384.0f);

campFireView.animationImages = [NSArray arrayWithObjects:
  [UIImage imageNamed:@"wish_launch_up_low_00000.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00001.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00002.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00003.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00004.png"],
  [UIImage imageNamed:@"wish_launch_up_low_00005.png"],
  ,nil];


  campFireView.animationDuration = 4;  // <--- I changed the duration.. 
  campFireView.animationRepeatCount = 1;

  [campFireView startAnimating];

  [self.view addSubview:campFireView];

这只是一个例子，但如果您的动画持续时间小于计时器，您可以使用计时器检查它以验证是否动画化

---

但是，在UIImageView中有许多选项可以设置其他动画…

谢谢。跳到OpneGL中准备下一个动画。这肯定是一个聪明的黑客。

  // detect it with timer
  [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(onTimer) userInfo:nil repeats:YES];

-(void)OnTimer {
    if ( [campFireView isAnimating] )
    {
        // still animating
    }
    else
    {
        // Animating done
    }

}