FlipsideViewController不關閉

Question

我的FlipsideViewController的「完成」按鈕不起作用（沒有崩潰，但也沒有關閉視圖）。下面的代碼：

在FlipSideViewController.h

@class FlipsideViewController; 

@protocol FlipsideViewControllerDelegate 
- (void)flipsideViewControllerDidFinish:(FlipsideViewController *)controller; 
@end 

@interface FlipsideViewController : UIViewController 

@property (weak, nonatomic) id <FlipsideViewControllerDelegate> delegate; 

- (IBAction)done:(id)sender; 

@end 

在FlipSideViewController.m

- (IBAction)done:(id)sender 
{ 
// an NSLog statement that is here is logging properly 
[self.delegate flipsideViewControllerDidFinish:self]; 

} 

在MainViewController.h

@interface FifthViewController : UIViewController <FlipsideViewControllerDelegate> 
... 

在MainViewController.m

- (void)flipsideViewControllerDidFinish:(FlipsideViewController *)controller 
{ 
[self dismissViewControllerAnimated:YES completion:nil]; 
} 

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
if ([[segue identifier] isEqualToString:@"showAlternate"]) { 
    [[segue destinationViewController] setDelegate:self]; 
} 
} 

順便說一下，這是一個選項卡式應用程序，所以我認爲這可能與它有關。任何建議，將不勝感激。謝謝。

Answer 1

我發現了這個問題。如果您在問題的代碼看，MainViewController.m下，當務之急是你設置的SEGUE標識在故事板文件，以及在代碼：

if ([[segue identifier] isEqualToString:@"showAlternate"]) { 
[[segue destinationViewController] setDelegate:self]; 
} 

謝謝你，塞爾吉奧，你的幫助。

Answer 2

試試這個：

- (IBAction)done:(id)sender 
{ 
    // an NSLog statement that is here is logging properly 
    [self.delegate performSelector:@selector(flipsideViewControllerDidFinish:) 
      withObject:self 
      afterDelay:0.0]; 
} 

它發生的某個時候，該辭退必須在運行循環的下一次迭代執行。這就是上面的performSelector聲明完成的內容。