/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 The presented view controller for the Swipe demo.

 */

#import "AAPLSwipeSecondViewController.h"

#import "AAPLSwipeTransitionDelegate.h"

@interface AAPLSwipeSecondViewController ()

@end

@implementation AAPLSwipeSecondViewController

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

- (void)viewDidLoad

{

    [super viewDidLoad];

    // This gesture recognizer could be defined in the storyboard but is

    // instead created in code for clarity.

    UIScreenEdgePanGestureRecognizer *interactiveTransitionRecognizer;

    interactiveTransitionRecognizer = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(interactiveTransitionRecognizerAction:)];

    interactiveTransitionRecognizer.edges = UIRectEdgeLeft;

    [self.view addGestureRecognizer:interactiveTransitionRecognizer];

}

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

//! Action method for the interactiveTransitionRecognizer.

//

- (IBAction)interactiveTransitionRecognizerAction:(UIScreenEdgePanGestureRecognizer *)sender

{

    if (sender.state == UIGestureRecognizerStateBegan) {

        // "BackToFirstViewController" is the identifier of the unwind segue

        // back to AAPLSwipeFirstViewController.  Triggering it will dismiss

        // this view controller.

        [self performSegueWithIdentifier:@"BackToFirstViewController" sender:sender];

    }

}

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

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

    if ([segue.identifier isEqualToString:@"BackToFirstViewController"])

    {

        // Check if we were presented with our custom transition delegate.

        // If we were, update the configuration of the

        // AAPLSwipeTransitionDelegate with the gesture recognizer and

        // targetEdge for this view controller.

        if ([self.transitioningDelegate isKindOfClass:AAPLSwipeTransitionDelegate.class])

        {

            AAPLSwipeTransitionDelegate *transitionDelegate = self.transitioningDelegate;

            // If this will be an interactive presentation, pass the gesture

            // recognizer along to our AAPLSwipeTransitionDelegate instance

            // so it can return the necessary

            // <UIViewControllerInteractiveTransitioning> for the presentation.

            if ([sender isKindOfClass:UIGestureRecognizer.class])

                transitionDelegate.gestureRecognizer = sender;

            else

                transitionDelegate.gestureRecognizer = nil;

            // Set the edge of the screen to dismiss this view controller

            // from.  This will match the edge we configured the

            // UIScreenEdgePanGestureRecognizer with previously.

            //

            // NOTE: We can not retrieve the value of our gesture recognizer's

            //       configured edges because prior to iOS 8.3

            //       UIScreenEdgePanGestureRecognizer would always return

            //       UIRectEdgeNone when querying its edges property.

            transitionDelegate.targetEdge = UIRectEdgeLeft;

        }

    }

}

@end