如何以编程方式从保存的时间间隔在 iPhone 中播放本地 mp4 视频

Question

我有一个场景，我希望用户能够从他之前离开的位置开始播放视频。我目前正在使用 MPMoviePlayerController。我可以使用 MPMoviePlayerController 的通知来存储播放持续时间。

所以我需要的是，每当用户开始播放同一视频时，他都可以选择从他离开的时间开始播放。是否可以？如果是的话我该怎么做。我应该使用 MPMoviePlayerController 吗？因为我已经查看了文档中的所有方法，但没有找到任何内容。下面是我当前播放视频的代码。

- (void) playDownloadedFile:(NSString*) filePath
{
    MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:filePath]];

    [[NSNotificationCenter defaultCenter] 
     addObserver:self
     selector:@selector(movieFinishedCallback:)
     name:MPMoviePlayerPlaybackDidFinishNotification
     object:player];

    [[NSNotificationCenter defaultCenter] 
     addObserver:self
     selector:@selector(movieDurationAvailableCallback:)
     name:MPMovieDurationAvailableNotification
     object:player];

    [[NSNotificationCenter defaultCenter] 
     addObserver:self
     selector:@selector(moviePlaybackStateDidChangeCallback:)
     name:MPMoviePlayerPlaybackStateDidChangeNotification
     object:player];

    player.view.frame = CGRectMake(50, 25, 924, 718);
    [self.view addSubview:player.view];

    //---play movie---
    [player play];
    videoState = [[VideoState alloc] init];
}

- (void) movieDurationAvailableCallback:(NSNotification*) aNotification {
    MPMoviePlayerController *moviePlayer = [aNotification object];
    videoState.videoDuration = moviePlayer.duration;
}

- (void) moviePlaybackStateDidChangeCallback:(NSNotification*) aNotification {
    MPMoviePlayerController *moviePlayer = [aNotification object];
    videoState.playBackState = moviePlayer.playbackState;
}

Answer 1

MPMoviePlayerController 有一个名为 initialPlaybackTime 的属性。将其设置为从观看者停止的地方开始。