从 UINavigationController 中使用自定义转换关闭 UIViewController 时出现黑屏

Question

我有一个视图控制器 FromViewController，我希望它显示带有自定义转换的 ToViewController。我已经为 to- 和 from-transitions 实现了 UIViewControllerAnimatedTransitioning，当我呈现和关闭 ToViewController.

时，它都运行良好

但是，如果我的 FromViewController 包含在 UINavigationController 中，当我关闭 ToViewController 时我只会看到黑屏。

这是 UIViewControllerAnimatedTransitioning 关闭时的代码：

- (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
}

我检查了该应用程序，UINavigationController 和 FromViewController 似乎都不在关闭后的视图层次结构中。

Answer 1

我明白了。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];

相反，我需要从导航控制器添加视图：

[self.containerView insertSubview:navigationController.view belowSubview:self.toViewController.view];

从 UINavigationController 中使用自定义转换关闭 UIViewController 时出现黑屏

Black screen when dismissing a UIViewController with custom transition from within a UINavigationController

uiviewcontroller

uinavigationcontroller

ios

presentviewcontroller