Avplayer 不在 ios 8.0 中播放视频

Question

我已经以编程方式实现了 avplayer。

@interface showAskUsVideo ()
{
    AVURLAsset *asset;
    AVPlayerItem *item;
}   
@property (strong, nonatomic) AVPlayer *player;

-(void)viewWillAppear:(BOOL)animated
{
    [self playVideo];
}

-(void)playVideo {
         [playerViewController.view setFrame:CGRectMake(37, 80 ,495,220)];
         asset = [AVURLAsset assetWithURL: url];
         item = [AVPlayerItem playerItemWithAsset: asset];
         _player = [[AVPlayer alloc] initWithPlayerItem: item];
         playerViewController.showsPlaybackControls = NO;
        playerViewController.player = _player;

        [item addObserver:self forKeyPath:@"playbackLikelyToKeepUp" options:NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew context:nil];

       [_player addObserver:self forKeyPath:@"rate" options:0 context:nil];

       [self.view addSubview:playerViewController.view];
}

但是当我选择部署目标 10.0 时，它工作正常。但对于 iOS 8.0 到 9.3，屏幕上只能看到 PlaybackControls 而不是视频。

我的代码需要改变什么？

Answer 1

playerViewController 是视图控制器层次结构的一部分吗？如果没有，那就可以解释了。尝试将其添加为视图控制器的子视图控制器：

[self addChildViewController:playerViewController];
[self.view addSubview:playerViewController.view];

Answer 2

试试这样：添加到 .m

@property (nonatomic, retain)AVPlayer *player;

@property (weak, nonatomic) IBOutlet AVPlayerClass *playerView;

（playerView 是你想要显示的视图）

NSURL *url = [[NSBundle mainBundle]URLForResource:@"video_name" withExtension:@"mp4"];
_player = [AVPlayer playerWithURL:url];


playerLayer = [AVPlayerLayer playerLayerWithPlayer:_player];
playerLayer.frame = _playerView.bounds;

playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;

[_playerView.layer insertSublayer:playerLayer atIndex:0];

_player.actionAtItemEnd = AVPlayerActionAtItemEndNone;
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(playerItemDidReachEnd:)
                                             name:AVPlayerItemDidPlayToEndTimeNotification
                                           object:[_player currentItem]];
[_player play];



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

AVPlayerItem *p = [notification object];
[p seekToTime:kCMTimeZero];

}

Answer 3

如果您为播放器使用ViewController。最佳实践是presentingViewController

[self presentViewController:playerViewController animated:YES completion:nil];

如果你使用 xib

PlayerViewController *vc = [[PlayerViewController alloc]
                          initWithNibName:@"PlayerViewController" bundle:nil];
[self.view addSubview:[vc view]];