我可以“蜷缩"吗?popViewControllerAnimated 上的页面? [英] Can I "curl down" a page on popViewControllerAnimated?

问题描述

我可以用这个代码卷起"一个视图控制器:

I can "curl up" a view controller with this code:

[UIView beginAnimations:@"animation" context:nil];
[self.navigationController pushViewController:page animated:NO];
[UIView setAnimationDuration:1];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.navigationController.view cache:NO]; 
[UIView commitAnimations];

但我不能像这样把最后一页卷起来:

but I can't curl down the last page like this:

[UIView beginAnimations:@"animation" context:nil];
[self.navigationController popViewControllerAnimated:NO];
[UIView setAnimationDuration:1];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.navigationController.view cache:NO]; 
[UIView commitAnimations];

知道为什么不吗?我真的很想反转"动画(就好像贴纸已被剥离以显示推"视图控制器并在他们单击按钮时重新卡住一样).

any idea why not? I just really want to "reverse" the animation (as if a sticker has been peeled off to show the 'push'ed view controller and stuck back on when they click a button).

谢谢

推荐答案

好吧，我的旧答案完全错误...问题是您在设置过渡视图之前弹出视图控制器.如果你把代码改成这样:

Ok, my old answer was totally wrong... the problem is that you are popping the view controller before setting the transition view. If you change the code to this:

[UIView beginAnimations:@"animation" context:nil];
[UIView setAnimationDuration:1];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.navigationController.view cache:NO]; 
[self.navigationController popViewControllerAnimated:NO];
[UIView commitAnimations];

效果很好

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