相关疑难解决方法(0)

这是我的代码设置一个简单的相机应用程序

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    let deviceSession = AVCaptureDeviceDiscoverySession(deviceTypes: [.builtInDualCamera, .builtInTelephotoCamera, .builtInWideAngleCamera], mediaType: AVMediaTypeVideo, position: .unspecified)
    for device in (deviceSession?.devices)!{
        if device.position == AVCaptureDevicePosition.front {
            do {
                currentDevice = device
                let input = try AVCaptureDeviceInput(device: device)
                if captureSession.canAddInput(input){
                    captureSession.addInput(input)

                    if captureSession.canAddOutput(photoOutput){
                        captureSession.addOutput(photoOutput)
                    }

                    if captureSession.canAddOutput(videoOutput){
                        captureSession.addOutput(videoOutput)
                        videoOutput.connection(withMediaType: AVMediaTypeVideo).isVideoMirrored = true
                    }

                    previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
                    previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
                    previewLayer.connection.videoOrientation = .portrait //Change orientation

                    cameraView.layer.addSublayer(previewLayer)
                    cameraView.addSubview(takePictureButton)
                    cameraView.addSubview(takeVideoButton)
                    cameraView.addSubview(saveVideoButton)


                    previewLayer.position = CGPoint(x: self.view.center.x, y: self.view.center.y)
                    previewLayer.bounds = CGRect(x: 100, …

我正在AVPlayerViewControlleriPad-App上播放视频文件(H.264,AAC,MP4-Container).一切都在iOS 10中运行.而且在iOS 11中它正确播放视频.

但是在iOS 11中,当我开始向任何方向滑动时,它会立即使视频变黑并使音频静音.它还显示底部时间轴旁边的加载指示器.

它也忽略了allowsPictureInPicturePlayback属性,因此它不会在iOS 11上显示PIP-Button.

这是我使用的代码:

avPlayerController = AVPlayerViewController()
avPlayerController?.showsPlaybackControls = true
avPlayerController?.allowsPictureInPicturePlayback = true
avPlayerController?.player = AVPlayer(url: videoUrl as URL)
avPlayerController?.player?.play()            

self.present(self.avPlayerController!, animated: true, completion: nil)            

avPlayerController?.player?.actionAtItemEnd = AVPlayerActionAtItemEnd.none
NotificationCenter.default.addObserver(self, selector: #selector(onVideoCompleted), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: self.avPlayerController!.player?.currentItem)

此功能可在视频结束时关闭视频播放器:

func onVideoCompleted(notification:Notification) {
    self.avPlayerController?.player = nil
    self.avPlayerController?.dismiss(animated: true, completion: nil)
}

当屏幕黑屏时,我在控制台中看到了这个:

AVOutputDeviceDiscoverySession (FigRouteDiscoverer) 
>>>> -[AVFigRouteDiscovererOutputDeviceDiscoverySessionImpl 
outputDeviceDiscoverySessionDidChangeDiscoveryMode:]: Setting device discovery 
mode to DiscoveryMode_Presence (client: MyAppName)