不要在 xcode 的文件夹中显示电影

Question

我创建了一个在文件夹中显示文件的应用程序。 我有一个文件 .mov 格式，我想从文件夹中显示它，但是当运行应用程序并单击播放按钮时，不显示这部电影，我看到了这张图片 ：

这是我的代码：（请指导我并告诉我我的错误）

- (IBAction)Play:(id)sender
{
    NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES)objectAtIndex:0];
    NSString *file = [documentPath stringByAppendingPathComponent:@"xcode4-outlet.mov"];
    NSURL *url = [NSURL fileURLWithPath:file];
    _moviePlayer = [[MPMoviePlayerController alloc]initWithContentURL:url];
    [self.view addSubview:_moviePlayer.view];
    _moviePlayer.fullscreen = YES;
    _moviePlayer.shouldAutoplay = YES;
    _moviePlayer.allowsAirPlay = YES;
    [_moviePlayer play];
}

编译器也帮我按摩：

movie player[9489:c07] [MPAVController] Autoplay: Likely to keep up or full buffer: 0
movie player[9489:c07] [MPAVController] Autoplay: Skipping autoplay, not enough buffered to keep up.
movie player[9489:c07] [MPAVController] Autoplay: Enabling autoplay
movie player[9489:c07] [MPCloudAssetDownloadController] Prioritization requested for media item ID: 0
movie player[9489:c07] [MPAVController] Autoplay: Enabling autoplay

Answer 1

在添加电影播放器​​之前需要检查文件是否存在，也可以添加默认文件

-(IBAction)Play:(id)sender
{

    NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES)objectAtIndex:0];
    NSString *file = [documentPath stringByAppendingPathComponent:@"xcode4-outlet.mov"];
    NSURL *url = [NSURL fileURLWithPath:file];

    BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:file];
    if(fileExists)
    {
        _moviePlayer = [[MPMoviePlayerController alloc]initWithContentURL:url];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePreloadDidFinish:) name:MPMoviePlayerLoadStateDidChangeNotification
                                                   object:_moviePlayer];
        _moviePlayer.shouldAutoplay=NO;
        [_moviePlayer prepareToPlay];
    }

}

在电影完全加载后添加您的电影

-(void)moviePreloadDidFinish:(NSNotification*)notification
{

   _moviePlayer.controlStyle=MPMovieControlStyleDefault;
   [self.view addSubview:_moviePlayer.view];
   [_moviePlayer play];
   [_moviePlayer setFullscreen:YES animated:YES];

}

Answer 2

您可能没有提供有效的 URL 路径。看起来您试图将资源附加到文档路径，但该资源实际上可能并不存在。您必须先将文件写入该路径。您应该始终仔细检查您的路径：

if ([[NSFileManager defaultManager] fileExistsAtPath:yourPath])
{
//path exists
}

否则，如果您的应用中有直接资源，则只需使用直接资源初始化电影播放器​​即可。

Answer 3

您的代码看起来不错。检查文件名是否正确..也试一试

-(void)playMovie
{
   NSString *documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
   NSString *filePath = [documentsDirectoryPath stringByAppendingPathComponent:@"xcode4-outlet.mov"];


    NSURL    *fileURL    =   [NSURL fileURLWithPath:filePath];
    MPMoviePlayerController *moviePlayerController = [[[MPMoviePlayerController alloc] initWithContentURL:fileURL]retain];
   [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moviePlaybackComplete:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:moviePlayerController];


   [self.view addSubview:moviePlayerController.view];

    moviePlayerController.fullscreen = YES;
   [moviePlayerController play];
  } 

  - (void)moviePlaybackComplete:(NSNotification *)notification
  {
   // playback completed 
  }