popViewControllerAnimated的波涛汹涌的动画：从alertView：didDismissWithButtonIndex：

Question

时，它的UIalertView委托方法内部完成alertView:didDismissWithButtonIndex:这是波涛汹涌和快速（使用的Xcode 7.3.1）我在与方法popViewControllerAnimated:动画问题。任何人都能明白为什么

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex 
{ 
    if (buttonIndex != alertView.cancelButtonIndex) 
    { 
     // animation of popViewControllerAnimated: is not working correctly 
     [self.navigationController popViewControllerAnimated:YES]; 
    } 
} 

奇怪的是，这个代码工作没有问题：

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex 
{ 
    if (buttonIndex != alertView.cancelButtonIndex) 
    { 
     // code is running om main thread 
     if ([[NSThread currentThread]isMainThread]) { 
      // still - by using GCD and go to main thread, the animation works!! 
      dispatch_async(dispatch_get_main_queue(), ^{ 
       [self.navigationController popViewControllerAnimated:YES]; 
      }); 
     } 
    } 
} 

而且这样的：

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { 

    if(buttonIndex != alertView.cancelButtonIndex) 
    { 
     // no problem with animation when done in alertView:clickedButtonAtIndex: 
     [self.navigationController popViewControllerAnimated:YES]; 
    } 
} 

我知道UIAlertView已经被废弃了一段时间，可以说，它是因为那个？该代码自2012年以来一直未在应用程序中使用，最近开始表现得很奇怪。

Answer 1

您可以用willDismissWithButtonIndex代替didDismissWithButtonIndex

- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex 
{ 
    if (buttonIndex != alertView.cancelButtonIndex) 
    { 
     [self.navigationController popViewControllerAnimated:YES]; 
    } 
} 

对于我这种工作确定尝试！我希望这可以帮助你