Unwind Segue Programmatically

#pragma mark - Trigger for unwind seque programmatically

- (IBAction) done: (id)sender

{

        SEL theUnwindSelector = @selector(goToRoot:);

        NSString *unwindSegueIdentifier = @"unwindToRootSeque";

     

        UINavigationController *nc = [self navigationController];

        // Find the view controller that has this unwindAction selector (may not be one in the nav stack)

        UIViewController *viewControllerToCallUnwindSelectorOn = [nc viewControllerForUnwindSegueAction: theUnwindSelector

                                                                                     fromViewController: self

                                                                                             withSender: sender];

        // None found, then do nothing.

        if (viewControllerToCallUnwindSelectorOn == nil) {

            NSLog(@"No controller found to unwind too");

            return;

        }

     

        // Can the controller that we found perform the unwind segue.  (This is decided by that controllers implementation of canPerformSeque: method

        BOOL cps = [viewControllerToCallUnwindSelectorOn canPerformUnwindSegueAction: theUnwindSelector

                                                                  fromViewController: self

                                                                          withSender: sender];

        // If we have permision to perform the seque on the controller where the unwindAction is implmented

        // then get the segue object and perform it.

        if (cps) {

             

            UIStoryboardSegue *unwindSegue = [nc segueForUnwindingToViewController: viewControllerToCallUnwindSelectorOn fromViewController: self identifier: unwindSegueIdentifier];

 

            [viewControllerToCallUnwindSelectorOn prepareForSegue: unwindSegue sender: self];

             

            [unwindSegue perform];

        }  

}