iOS 7自定义转换问题

Question

我正在尝试在iPad上实现一些自定义转换，但我遇到了一些问题。由于x，y坐标并不总是从containerView的{​​{1}}的左上角开始，当设备旋转时我写了以下方法

transitionContext

在纵向模式和颠倒过程中，一切似乎都能正常工作。问题出在景观上。

1. 当设备方向为- (CGRect)rectForPresentedStateStart:(id<UIViewControllerContextTransitioning>)transitionContext { UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey]; UIView *containerView = [transitionContext containerView]; switch (fromViewController.interfaceOrientation) { case UIInterfaceOrientationLandscapeRight: return CGRectMake(0, containerView.bounds.size.height, containerView.bounds.size.width, containerView.bounds.size.height * 2 / 3); case UIInterfaceOrientationLandscapeLeft: return CGRectMake(0, - containerView.bounds.size.height * 2 / 3, containerView.bounds.size.height, containerView.bounds.size.height * 2 / 3); case UIInterfaceOrientationPortraitUpsideDown: return CGRectMake(- containerView.bounds.size.width * 2 / 3, 0, containerView.bounds.size.width * 2 / 3, containerView.bounds.size.height); case UIInterfaceOrientationPortrait: return CGRectMake(containerView.bounds.size.width, 0, containerView.bounds.size.width * 2 / 3, containerView.bounds.size.height); default: return CGRectZero; } } - (CGRect)rectForPresentedStateEnd:(id<UIViewControllerContextTransitioning>)transitionContext { UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey]; UIView *containerView = [transitionContext containerView]; switch (toViewController.interfaceOrientation) { case UIInterfaceOrientationLandscapeRight: return CGRectOffset([self rectForPresentedStateStart:transitionContext], 0, - containerView.bounds.size.height * 2 / 3); case UIInterfaceOrientationLandscapeLeft: return CGRectOffset([self rectForPresentedStateStart:transitionContext], 0, containerView.bounds.size.height * 2 / 3); case UIInterfaceOrientationPortraitUpsideDown: return CGRectOffset([self rectForPresentedStateStart:transitionContext], containerView.bounds.size.width * 2 / 3, 0); case UIInterfaceOrientationPortrait: return CGRectOffset([self rectForPresentedStateStart:transitionContext], - containerView.bounds.size.width * 2 / 3, 0); default: return CGRectZero; } } 时，视图会在转换开始前消失一秒钟。

2. 当设备方向为UIInterfaceOrientationLandscapeLeft时，我遇到以下问题：导航栏较小，转换结束时会像图片一样转为正常



转换发生时导航栏出现问题



转换完成后

我不确定这些是苹果的错误还是我做错了什么？如果是，我该如何解决问题？

Answer 1

这绝对是一个苹果虫。为了呈现动画，我正在使用这样的东西：

if (self.presenting) {
        toViewController.view.frame = [self rectForPresentedStateStart:transitionContext];
        [transitionContext.containerView addSubview:toViewController.view];
        [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
            fromViewController.view.frame = [self rectForDismissedState:transitionContext];
            toViewController.view.frame = [self rectForPresentedStateEnd:transitionContext];
        } completion:^(BOOL finished) {
            [transitionContext completeTransition:YES];
        }];    
}

如果添加视图（[transitionContext.containerView addSubview:toViewController.view];，导航控制器的问题就解决了 ）animateWithDuration方法之后。仍然无法弄清楚原因。

Answer 2

我猜，您的containerView是UIWindow。所以它的界限与方向无关，因此containerView.bounds.size.height在纵向和横向上是相同的。

如果我是对的，你需要使用宽度作为高度和高度作为横向宽度