目标c-如何在iOS中使用视频数据播放视频

Question

我正在从服务器获取视频数据。我正在使用signalR框架。首先，我从iPhone照片库中捕捉视频。接下来我将转换编码格式（base64EncodedStringwithOptions）的方法。接下来我将视频加密数据发送到signalR服务器。然后我接收视频数据并使用CCD_ 2解密和播放视频数据。但我的问题视频没有播放。但我收到了来自信号R的视频数据。为了解密，我使用这个方法。（NSDataBase64DecodingIgnoreUnknownCharacters）

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectory = [paths objectAtIndex:0];
NSString *videoFile=[documentDirectory stringByAppendingPathComponent:post.mediaName];
NSURL *url;
if ([[NSFileManager defaultManager] fileExistsAtPath:videoFile]) {
url=[NSURL URLWithString:videoFile];
}
NSLog(@"Video URL is:%@",url);
AVPlayer *player = [AVPlayer playerWithURL:url];
cell.videoPlayerController.player = player;
[player play];

我得到的视频URL是这样的：

Video URL is:/Users/Library/Developer/CoreSimulator/Devices/EEC96DE7-6D0F-4D80-82B8-3C24E4F6B3EF/data/Containers/Data/Applicatication video0006.mp4 

Answer 1

您可以使用MPMoviePlayerController从url'播放视频，但请确保您必须声明属性，例如

 @property MPMoviePlayerController *videoController;

不要创建MPMoviePlayerController的本地对象。

你可以用之类的东西

 self.videoController = [[MPMoviePlayerController alloc] init];
    [self.videoController setContentURL:tempView.videoURL];  //here your url
    [self.videoController.view setFrame:CGRectMake (0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    [self.view addSubview:self.videoController.view];
    // close or cancel button if you want to put 
    UIButton *closeButton = [[UIButton alloc]initWithFrame:CGRectMake(self.view.frame.size.width-60, 20, 60, 30)];
    [closeButton addTarget:self action:@selector(cancel:) forControlEvents:UIControlEventTouchUpInside];
    [closeButton setTitle:@"Cancel" forState:UIControlStateNormal];
    [self.videoController.view addSubview:closeButton];
   // add observer to notify when playing will be completed if you want to put
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(videoPlayBackDidFinish:)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:self.videoController];
    [self.videoController play];

更新：

您必须使用类似的文件url

   NSURL *url = [NSURL fileURLWithPath:videoFile]; 

而不是

  [NSURL URLWithString:videoFile];