popViewControllerAnimated的波濤洶涌的動畫：從alertView：didDismissWithButtonIndex：

Question

時，它的UIalertView委託方法內部完成alertView:didDismissWithButtonIndex:這是波濤洶涌和快速（使用的Xcode 7.3.1）我在與方法popViewControllerAnimated:動畫問題。任何人都能明白爲什麼

- (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，這個代碼工作沒有問題：

- (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]; 
      }); 
     } 
    } 
} 

而且這樣的：

- (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已經被廢棄了一段時間，可以說，它是因爲那個？該代碼自2012年以來一直未在應用程序中使用，最近開始表現得很奇怪。

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]; 
    } 
} 

對於我這種工作確定嘗試！我希望這可以幫助你