我有一个简单的UINavigationController,它通过自定义segue将UIViewController推送到堆栈.然后我在第一个UIViewController上实现了一个IBAction来执行一个展开动作,我实现了segueForUnwindingToViewController.不幸的是,没有调用segueForUnwindingToViewController(我确实确认在第一个VC上调用了canPerformUnwindSegue).

我没有看到任何这种行为的简单例子.有人可以帮忙吗？谢谢.

这是NavigationController的根视图控制器中的代码.

- (IBAction) unwindFromSegue:(UIStoryboardSegue *)segue {
// unwinds back to here
//[self performSegueWithIdentifier:@"UnwindToObjectManageSegue" sender:self];

}

- (BOOL)canPerformUnwindSegueAction:(SEL)action fromViewController:(UIViewController *)fromViewController
                     withSender:(id)sender {
return YES;
}

- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {
return YES;
}

- (UIStoryboardSegue *)segueForUnwindingToViewController:(UIViewController *)toViewController
                                  fromViewController:(UIViewController *)fromViewController
                                          identifier:(NSString *)identifier {
ObjectManageObjectDetailSegue *segue = [[ObjectManageObjectDetailSegue alloc] initWithIdentifier:identifier source:fromViewController destination:toViewController];
[segue setUnwinding:YES];
return segue;
}