Question

我试图在MPMoviePlayercontroller按下的按钮上获得某种通知。问题是按下按钮时我没有收到任何通知。我正在使用NSNotification。为什么我没有收到通知？

ViewDidLoad:

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

和方法

-(void) exitedFullScreen
{
    NSLog(@"TEST");
}

调用MPMoviePlayer的代码：

NSString *youTubeVideoHTML = @"<!DOCTYPE html><html><head><style>body{margin:0px 0px 0px 0px;}</style></head> <body> <div id=\"player\"></div> <script> var tag = document.createElement('script'); tag.src = \"http://www.youtube.com/player_api\"; var firstScriptTag = document.getElementsByTagName('script')[0]; firstScriptTag.parentNode.insertBefore(tag, firstScriptTag); var player; function onYouTubePlayerAPIReady() { player = new YT.Player('player', { width:'%0.0f', height:'%0.0f', videoId:'%@', events: {  } }); } function onPlayerReady(event) { event.target.playVideo(); } </script> </body> </html>";


NSString *embedHtml = [NSString stringWithFormat: youTubeVideoHTML,
                       webView.frame.size.width,
                       webView.frame.size.height,
                       youtubeId[0]];

webView.mediaPlaybackRequiresUserAction = NO;

[webView loadHTMLString: embedHtml baseURL: [NSURL URLWithString: @"http://youtube.com"]];

Answer 1

退出全屏不会改变播放状态。如果您想知道何时退出全屏，请注册MPMoviePlayerDidExitFullscreenNotification。

另外，就一般情况而言，回调方法最好有一个冒号（例如exitedFullScreen:）;参数是通知本身：

- (void) exitedFullScreen: (NSNotification*) n {
    NSLog(@"%@", @"TEST");
}

Answer 2

您应该创建一个MPMoviePlayerViewController并使用您的视频网址初始化并展示它。播放视频并关闭后，您将收到通知。

MPMoviePlayerController中的NSNotification

2 个答案: