如何从UITabBarController呈现MPMoviePlayerViewController？ [英] How to present MPMoviePlayerViewController from a UITabBarController?

问题描述

我有一个视图控制器已添加到 UITabBarController 。在这个视图控制器中，我有一个按钮，使用 MPMoviePlayerViewController 打开一部电影。

I have a view controller that's been added to a UITabBarController. In this view controller I have a button that opens up a movie using MPMoviePlayerViewController.

当我播放电影时，顶部导航栏仍然叠加在电影的顶部，有效地阻挡了部分屏幕。

When I play the movie, the top navigation bar is still overlayed on top of the movie, effectively blocking out a portion of the screen.

但是，当这个视图控制器不在 UITabBarController 中时，电影可以正常播放。

When this view controller isn't inside a UITabBarController, however, the movie plays fine.

任何人都知道发生了什么事？

Anyone know what's going on?

推荐答案

想出来。我觉得事情变得很糟糕，因为 MPMoviePlayerViewController 有一个方法被添加为 UIViewController 的一个名为 presentMoviePlayerViewControllerAnimated ：。通常你会在你的 UIViewController 中这样称呼它：

Figured it out. I guess things get wonky because MPMoviePlayerViewController has a method added as a category to UIViewController called presentMoviePlayerViewControllerAnimated:. Normally you would call it like this in your UIViewController:

[self presentMoviePlayerViewControllerAnimated:mp];

但在这种情况下，如果您已将视图控制器添加到 UITabBarController stack， self 是标签栏控制器中的视图控制器，我想这会让事情变得棘手。修复是使用父视图控制器调用 presentMoviePlayerViewControllerAnimated：，在我的情况下，是另一个 UIViewController 的UITabBarController 。我只是引用父视图并将其添加到我的视图控制器的 init 方法，然后调用类似 [parentController presentMoviePlayerViewControllerAnimated：mp] 。

But in this case, if you've added your view controller to a UITabBarController stack, self is your view controller within the tab bar controller, and I guess this makes things screwy. The fix is to call presentMoviePlayerViewControllerAnimated: with the parent view controller, which in my case, was another UIViewController that was housing UITabBarController. I simply referenced the parent view and added it to my view controller's init method, then called something like [parentController presentMoviePlayerViewControllerAnimated:mp].

哇。希望能帮助别人。

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