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[英]Using custom iOS 7 transition with subclassed UINavigationController occasionally results in black screen
[英]Black screen when dismissing a UIViewController with custom transition from within a UINavigationController
我有一个视图控制器FromViewController
,我希望它提供一个自定义转换的ToViewController
。 我已经为to-和from-transitions实现了UIViewControllerAnimatedTransitioning
,当我出现并解除ToViewController
时,它们ToViewController
。
但是,如果我的FromViewController
包含在UINavigationController
当我解除ToViewController
时,我只会得到一个黑屏。
解雇时,这是来自UIViewControllerAnimatedTransitioning
的代码:
- (void)animateTransition:(nonnull id<UIViewControllerContextTransitioning>)transitionContext {
self.toViewController = (ToViewController *)
[transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
UINavigationController *navigationController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
self.fromViewController = (FromViewController *)navigationController.topViewController;
self.containerView = transitionContext.containerView;
[self.containerView insertSubview:self.fromViewController.view belowSubview:self.toViewController.view];
// My animations go here
// In the animation completion block I call:
[transitionContext completeTransition:!transitionContext.transitionWasCancelled]; // this is when my screen goes black
}
我已经检查了应用程序,似乎在解雇后UINavigationController
和FromViewController
都不在视图层次结构中。
我想到了。 问题是当我将视图添加到转换上下文容器视图时:
[self.containerView insertSubview:self.fromViewController.view belowSubview:self.toViewController.view];
而我需要从导航控制器添加视图:
[self.containerView insertSubview:navigationController.view belowSubview:self.toViewController.view];
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