/*

 Copyright (C) 2018 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Custom segue for pushing new view controllers onto the

  navigation stack of a QuizContainerViewController.

 */

#import "QuizContainerFadeViewControllerSegue.h"

#import "QuizContainerViewController.h"

@implementation QuizContainerFadeViewControllerSegue

//| ----------------------------------------------------------------------------

//  This segue does not implement the transition animation.  Instead, it calls

//  -pushViewController: or -popToViewController: of the parent

//  QuizContainerViewController, which actually performs the transition.

//

- (void)perform

{

    if (self.unwind)

    {

        // Access the destinationViewController's parent to aquire a reference

        // to QuizContainerViewController.  The sourceViewController may not be

        // a direct child of the QuizContainerViewController in which case its

        // parent would not be a reference to the QuizContainerViewController.

        QuizContainerViewController *containerVC = (QuizContainerViewController*)(self.destinationViewController).parentViewController;

        [containerVC popToViewController:self.destinationViewController animated:YES];

    }

    else

    {

        QuizContainerViewController *containerVC = (QuizContainerViewController*)(self.sourceViewController).parentViewController;

        [containerVC pushViewController:self.destinationViewController animated:YES];

    }

}

@end