iphone - 如何知道 iPhone 中的 MPMoviePlayerController 何时已暂停？

Question

我想在用户暂停视频时为我的视频添加叠加 View 。有什么方法可以从 MPMoviePlayerController 获取暂停通知吗？

根据Apple Doc ，应该有办法做到这一点，但我找不到应该使用哪个通知来实现此目的。

引用:

In addition to being notified when playback finishes, interested clients can be notified in the following situations:

-When the movie player begins playing, is paused, or begins seeking forward ... For more information, see the Notifications section in this reference.

Answer 1

我假设您了解委托(delegate)和协议(protocol)作为接收回调的方式？

还有另一种全局机制，称为通知。

您可以通过以下方式执行此操作

[[NSNotificationCenter defaultCenter] addObserver:self 
    selector:@selector(playbackStateChanged) 
    name:MPMoviePlayerPlaybackStateDidChangeNotification object:nil];

然后，在playbackStateChanged中，您可以获取playbackState

 - (void) playbackStateChanged {

   _player.playbackState; // reading the playback

 }

文档中指定了直接从播放器读取playbackstate的步骤

To get the current playback state, get the value of the playbackState property of the movie player object.