iOS > 可以播放部分下载的视频吗？

Question

假设我们正在下载一个大视频 - 它有 50Mb - 但到目前为止只下载了 25Mb - 是否可以在完全下载之前开始播放视频？

Answer 1

我假设您正在为您的视频使用 MPMoviePlayerController...

MPMoviePlayerController 有一个 loadState 属性，你可以用 this notification 监控它.检查视频是否已下载到可播放的范围，然后播放。

//Begin observing the moviePlayer's load state.
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayerLoadStateChanged:) name:MPMoviePlayerLoadStateDidChangeNotification object:moviePlayer];


- (void)moviePlayerLoadStateChanged:(NSNotification *)notification{
    //NSLog(@"State changed to: %d\n", moviePlayer.loadState);
    if(moviePlayer.loadState == MPMovieLoadStatePlayable && [videoIndicator isAnimating]){
        //if load state is ready to play
        [videoIndicator stopAnimating];//Pause and hide the indicator
        [self.contentView addSubview:[moviePlayer view]];
        [moviePlayer setFullscreen:YES animated:YES];
        [moviePlayer play];//play the video
    }

}

这非常重要:如果您尝试下载超过 10 十分钟的视频，您将需要使用 HTTP Live Streaming .