Unwind Segue for UINavigationController

问题

I have a simple UINavigationController which pushes a UIViewController onto the stack via a custom segue. I then implemented an IBAction on the first UIViewController to perform an unwind action and I implement segueForUnwindingToViewController. Unfortunately, the segueForUnwindingToViewController is not being called (I did confirm that canPerformUnwindSegue is being called on the first VC).

I have not seen any simple examples of this behavior. Can anyone please help? Thanks.

Here's the code from the root view controller of the NavigationController.

- (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;
}

回答1:

I had the same problem and I finally found a solution: https://github.com/simonmaddox/CustomUnwindSegue

He also had a problem with it not being called. Turns out that any view controller that is in a UINavigationController will not call the presenting view controller but the UINavigationController instead. This means you must subclass that UINavigationController and add that method there instead.

来源：https://stackoverflow.com/questions/16092189/unwind-segue-for-uinavigationcontroller

标签

ios

uistoryboardsegue