Reversal of Custom Segue with Storyboarding

问题

I have a custom segue animation that occurs when pushing a new view controller onto the stack. When popping the view controller that was presented with said custom segue, however, the default navigation controller animation happens (that is, the current view controller animates to the right while the parent view controller translates on-screen from the left edge).

So my question is this: is there a way to write a custom pop segue animation which happens when popping a view controller off the stack?

Edit (solution):

I ended up defining a custom segue similar to the selected answer. In the Storyboard, I dragged a custom segue from the child view controller back to its parent, gave it an identifier and the newly written reverse segue as its class. Yes, I realize it is virtually identical to a modal transition. Client requirements necessitated this madness, so before anyone comments, understand that I know one shouldn't have to do this under normal circumstances.

- (void)perform {
  UIViewController *src = (UIViewController *)self.sourceViewController;
  UIViewController *dest = (UIViewController *)self.destinationViewController;

  [UIView animateWithDuration:0.3 animations:^{
    CGRect f = src.view.frame;
    f.origin.y = f.size.height;
    src.view.frame = f;

  } completion:^(BOOL finished){
    src.view.alpha = 0;
    [src.navigationController popViewControllerAnimated:NO];
  }];
}

回答1:

Yes. Here is an example where I pop to the top level. When your create the segue in Storyboard. Use select or enter the new new segue class in the attributes inspector.

//
//  FlipTopPop.h

#import <UIKit/UIKit.h>


@interface FlipTopPopToRoot : UIStoryboardSegue

@end

and

//  FlipTopPop.m

#import "FlipTopPopToRoot.h"

@implementation FlipTopPopToRoot

- (void) perform {

    UIViewController *src = (UIViewController *) self.sourceViewController;
    [UIView transitionWithView:src.navigationController.view duration:0.5
                   options:UIViewAnimationOptionTransitionFlipFromBottom
                animations:^{
                    [src.navigationController popToViewController:[src.navigationController.viewControllers objectAtIndex:0] animated:NO];;
                }
                    completion:NULL];
}

@end

If you want to pop up just one level change use this custom segue:

//  PopSegue.h

#import <UIKit/UIKit.h>

@interface PopSegue : UIStoryboardSegue

@end

and

//  PopSegue.m

#import "PopSegue.h"

@implementation PopSegue

- (void) perform {

    UIViewController *src = (UIViewController *) self.sourceViewController;
    [src.navigationController popViewControllerAnimated:YES];
}

@end

回答2:

For anyone following this now, iOS 7 lets you animate both ways:

Set the segue to Push, then see code below for a push implementation.

https://github.com/Dzamir/OldStyleNavigationControllerAnimatedTransition

回答3:

As the commenter Linus pointed out, the other solutions presented will create another instance of the UIViewController. I think this link here describe other alternatives to enabling reverse segue animations.

http://robsprogramknowledge.blogspot.com/2012/05/back-segues.html

来源：https://stackoverflow.com/questions/9316233/reversal-of-custom-segue-with-storyboarding

标签

objective-c

ios

storyboard

reverse

segue