如何从 NSData 播放视频

Question

我想知道是否可以使用 MPMoviePlayerController 从 NSData 对象播放视频。

Answer 1

Ben 的答案在模拟器上完美运行，但无法在设备上运行，您无法在设备上的任何位置书写。检查下面的代码

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"myMove.mp4"];

    [videoData writeToFile:path atomically:YES];
    NSURL *moveUrl = [NSURL fileURLWithPath:path];
    player = [[MPMoviePlayerController alloc]init];
    [player setContentURL:moveUrl];
    player.view.frame = viewPlayer.bounds;
    [viewPlayer addSubview:player.view];
    [player play];

Answer 2

据我所知，这是不可能的。如果数据来自您的数据库，您可以将其保存到临时文件中并播放吗？

Answer 3

在这种情况下最好使用 NSFileManager 而不是 writeToFile

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"myMove.mp4"];

[[NSFileManager defaultManager] createFileAtPath:path contents:videoData attributes:nil];

NSURL *moveUrl = [NSURL fileURLWithPath:path];
player = [[MPMoviePlayerController alloc]init];
[player setContentURL:moveUrl];
player.view.frame = viewPlayer.bounds;
[viewPlayer addSubview:player.view];
[player play];

Answer 4

1. 创建一个具有 NSData 类型的文件，例如，如果您的 NSData 是 mp4 类型，则创建一个具有该类型的文件 - 例如 - “myMove.mp4”

2. 将文件复制到您的应用资源中

3. 添加此代码

   NSData *mediaData; //your data    
   NSString *movePath=[[NSBundle mainBundle] pathForResource:@"myMove" ofType:@"mp4"];         
   [mediaData writeToFile:movePath atomically:YES];        
   NSURL *moveUrl= [NSURL fileURLWithPath:movePath];    
   MPMoviePlayerController *movePlayer=[[MPMoviePlayerController alloc]init];          
   [movePlayer setContentURL:moveUrl]; 
   [movePlayer play];