ios - XCode 4.6显示了方法+(void)beginAnimations:(NSString *)animationID context:(void *)context的内存泄漏警告。

Question

这个问题Iphone - how to pass a parameter to animationDidStop?在上下文中提出了整个问题。根据最佳答案，我在我的animationDidStopSelector中释放了上下文。但是，由于我更新了Xcode，因此收到此警告

 - (void) helloThere: (int) myValue {

  // I am trying to pass myValue to animationDidStop
  [UIView beginAnimations:nil context:[[NSNumber alloc] initWithFloat:self.view.frame.origin.x]]; //Warning raised on this line
  [UIView setAnimationDuration:1.0];
  [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
  [UIView setAnimationDelegate:self];

  // do stuff
  [UIView commitAnimations];
}

- (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {

  CGFloat usesThisValue = [(NSNumber *) context floatValue];
  [(NSNumber *) context release];
}

日志中的警告内容为:

warning: Potential leak of an object       [UIView beginAnimations:nil context:[[NSNumber alloc] initWithFloat:self.view.frame.origin.x]]; //Warning raised on this line
 1 warning generated.

有解决方案吗？如果没有，我如何为我的项目关闭此警告？

Answer 1

问题是您在此调用内分配了一个NSNumber。该号码没有被释放。尝试更改此:

[UIView beginAnimations:nil context:[[NSNumber alloc] initWithFloat:self.view.frame.origin.x]];

编辑
Here is a link to a post about handling the (void *)context

因此，您需要某种方式来保留对NSNumber的引用，以便以后可以对其进行清理。

self.contextNumber = [[NSNumber alloc] initWithFloat:self.view.frame.origin.x];
[UIView beginAnimations:nil context:self.contextNumber]; 

并在你的dealloc中清理它