ios - FlipsideViewController 不关闭

Question

我的 FlipsideViewController 的“完成”按钮不起作用（没有崩溃，但也没有关闭视图）。这是代码：

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 中

- (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];
}
}

顺便说一句，这是一个选项卡式应用程序，所以我认为这可能与它有关。任何建议，将不胜感激。谢谢你。

Answer 1

试试这个：

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

有时，必须在运行循环的下一次迭代中执行解除。这就是performSelector上面的语句完成的。

Answer 2

我发现了问题。如果您查看问题代码，在 MainViewController.m 下，您必须在情节提要文件和代码中设置 segue 标识符：

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

谢谢你，塞尔吉奥，你的帮助。