使用AirPlay和AVPlayer在外部屏幕上显示视频

Question

我正在使用Apple Airplay并AVPlayer在外部显示器上显示视频,同时使用Apple TV和AirPlay在设备上显示一些控件.

我正在使用这个类AVPlayer在外部屏幕上显示:

#import "AirPlayViewController.h"

@interface AirPlayViewController ()

@end

@implementation AirPlayViewController

- (id)initWithFrame:(CGRect)iFrame{
    self.view.frame = iFrame;

    self.backGroundImageView = [[UIImageView alloc]initWithFrame:iFrame];
    [self.view addSubview: self.backGroundImageView];

    return self;
}

- (void)viewDidLoad{
    [super viewDidLoad];

}

-(void)viewWillDisappear:(BOOL)animated{
    [audioVideoPlayer pause];
}

-(void)playMediaWithURL:(NSURL*)aURL{
    audioVideoPlayer = [AVPlayer playerWithURL:aURL];
    audioVideoPlayer.usesExternalPlaybackWhileExternalScreenIsActive=YES;
    audioVideoPlayer.allowsExternalPlayback= YES;

    //manually resizing and adding the layer, so that the app does not get confused with airplayfunctionality
    AVPlayerLayer* playerLayer = [AVPlayerLayer playerLayerWithPlayer: audioVideoPlayer];
    playerLayer.frame = self.view.bounds;
    [self.view.layer addSublayer:playerLayer];

    if (audioVideoPlayer) {
        [audioVideoPlayer play];
    }
}

-(void)stopMediaPlayback{
    [audioVideoPlayer pause];
    [[AVPlayerLayer playerLayerWithPlayer: audioVideoPlayer] removeFromSuperlayer];
    audioVideoPlayer = nil;
}

@end

我遇到的问题就在那里playMediaWithURL:.该AVPlayer图层不会自动添加到外部屏幕,但我必须手动添加它,感觉有点脏,当我想AVPlayer再次从视图中删除时,会导致所有类型的清理工作.

有没有其他人遇到这个问题,并找到一些巧妙的方法来实现它？

在airPlayViewController从另一个叫做UIViewController包含第二个窗口以及所有的AirPlay的委托东西来显示它,使用此功能:

- (void)setupMirroringForScreen:(UIScreen *)anExternalScreen{
    //find the correct resolution for the external screen
    UIScreen *tScreen= anExternalScreen;
    CGSize max = {0, 0};
    UIScreenMode *maxScreenMode = nil;

    for (UIScreenMode *current in tScreen.availableModes) {
        if (maxScreenMode == nil || current.size.height > max.height || current.size.width > max.width) {
            max = current.size;
            maxScreenMode = current;
        }
    }
    tScreen.currentMode = maxScreenMode;

    // Setup window in external screen
    self.externalWindow = [[UIWindow alloc] initWithFrame:tScreen.bounds];
    self.externalWindow.hidden = NO;
    self.externalWindow.layer.contentsGravity = kCAGravityResizeAspect;
    self.externalWindow.screen = tScreen;

    self.airPlayVC = [[AirPlayViewController alloc]initWithFrame:tScreen.bounds];
    [self.airPlayVC.backGroundImageView setImage:[UIImage imageNamed:mainMenuExternalBackgroundImage]];

    //try to play a video on the external Screen/ Audio file as fallback
    NSURL *tURL= [[NSBundle mainBundle]URLForResource:mainMenuVideo withExtension:nil];
    if (!tURL) {
        tURL = [[NSBundle mainBundle] URLForResource:mainMenuAmbienceMusic withExtension:nil];
    }
    [self.airPlayVC playMediaWithURL:tURL];
    [self.externalWindow addSubview:self.airPlayVC.view];

}