如何拥有一个处理程序，重复的UIView animateWithDuration？

问题描述

我使用UIView类的方法animateWithDuration为重复我的看法动画。我怎么能有可用于以后停止这个动画的处理程序？例如，重复动画开始在一个方法，我需要从其他方法后停药。

I'm using UIView class method animateWithDuration for repeating my view animation. How can I have a handler that could be used to stop this animation later? For example, repeated animation starts in one method and I need to stop it later from another method.

推荐答案

您可以做这样的事情假设你已经创建了一个的取消的属性。正如在评论中指出，完成模块的startAnimation调用需要被包裹在一个异步调用，以避免堆栈溢出。一定要与任何类类型你确实有取代ID。

You could do something like this assuming you have created a canceled property. As noted in the comments the completion block's startAnimation call needs to be wrapped in an async call to avoid a stack overflow. Be sure to replace the "id" with whatever class type you actually have.

- (void)startAnimation {
    [UIView animateWithDuration:1.0
                          delay:0.0
                        options:UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction
                     animations:^(void) {
                         //animate
                     }
                     completion:^(BOOL finished) {
                         if(!self.canceled) {
                             __weak id weakSelf = self;
                             [[NSOperationQueue mainQueue] addOperationWithBlock:^{
                                 [weakSelf startAnimation];
                             }];
                         }
                     }
     ];
}

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