Question

我正在加载动态数据，这是一个包含一些描述值和视频网址的字典数组。视频可以是空的，单个或多个URL路径。我正在使用mpmovieplayercontroller加载视频，而缓冲如果我点击倒带或前进按钮，屏幕变黑，我看不到控件，我必须从后台删除应用程序。有没有办法解决这个问题。

NSURL *fileURL = [NSURL URLWithString:location];
self.moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moviePlaybackComplete:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:self.moviePlayerController];

self.moviePlayerController.controlStyle = MPMovieControlStyleFullscreen;
self.moviePlayerController.movieSourceType = MPMovieSourceTypeFile;
[self.moviePlayerController prepareToPlay];
[self.moviePlayerController.view setFrame: CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
[self.view addSubview:self.moviePlayerController.view];

Answer 1

这段代码可以帮助您尝试使用以下代码：

-(void) moviePlaybackComplete:(NSNotification*) aNotification 
{
    MPMoviePlayerController *moviePlayer = [aNotification object];

    [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];

    [moviePlayer.view removeFromSuperview];

    [self.presentingViewController dismissViewControllerAnimated:YES completion:NULL];
}

这可以帮助您并尝试根据您的要求更改应用

Answer 2

您正在致电

[self.view addSubview:self.moviePlayerController.view];

每次不删除电影播放器控制器视图时，您都会添加上一次。因此，您的电影播放器控制器视图只是堆叠在一起。而是使用您对旧视图的现有引用将其删除：

NSURL *fileURL = [NSURL URLWithString:location];
if (self.moviePlayerController)
    [self.moviePlayerController.view removeFromSuperview];
self.moviePlayerController = 
    [[MPMoviePlayerController alloc] initWithContentURL:fileURL];
// ... and so on ...

另一条建议：实际上不要打电话

[self.view addSubview:self.moviePlayerController.view];

直到电影准备播放为止。注册告知您的通知，并在收到通知时将视图添加到您的界面：

__block id observer = [[NSNotificationCenter defaultCenter]
         addObserverForName:MPMoviePlayerReadyForDisplayDidChangeNotification 
         object:nil 
         queue:nil usingBlock:^(NSNotification *note) {
    if (self.moviePlayerController.readyForDisplay) {
        [[NSNotificationCenter defaultCenter] removeObserver:observer];
        [self.view addSubview:self.moviePlayerController.view];
    }
}];

MPMovieplayerController在单击倒带或前进时变为黑屏

2 个答案: