如何在Swift中使用叠加式CAShapeLayer录制视频？

问题描述

我有一个CAShapeLayer，它可以识别某人的脸。我遇到的问题是，当我完成录制并观看视频时，CAShapeLayer不会出现。为什么会发生这种情况，我将如何解决？谢谢！

 // Create a new layer drawing the bounding box
private func createLayer(in rect: CGRect) {


    let mask = CAShapeLayer()
    mask.frame = rect
    mask.cornerRadius = 10
    mask.opacity = 0.8
    mask.backgroundColor = UIColor.black.cgColor

    maskLayer.append(mask)
    layer.insertSublayer(mask,at: 1)

} 



 func drawFaceboundingBox(face : VNFaceObservation) {
    
    let transform = CGAffineTransform(scaleX: 1,y: -1).translatedBy(x: 0,y: -frame.height)
    
    let translate = CGAffineTransform.identity.scaledBy(x: frame.width,y: frame.height)
    
    let facebounds = face.boundingBox.applying(translate).applying(transform)

    createLayer(in: facebounds)
 }

//Start Recording
func startRecording() {

    if movieOutput.isRecording == false {
    
        let connection = movieOutput.connection(with: AVMediaType.video)
    
        if (connection?.isVideoOrientationSupported)! {
            connection?.videoOrientation = currentVideoOrientation()
        }
    
        if (connection?.isVideoStabilizationSupported)! {
            connection?.preferredVideoStabilizationMode = AVCaptureVideoStabilizationMode.auto
        }
    
        let device = activeInput.device
    
        if (device.isSmoothAutoFocusSupported) {
        
            do {
                try device.lockForConfiguration()
                device.isSmoothAutoFocusEnabled = false
                device.unlockForConfiguration()
            } catch {
               print("Error setting configuration: \(error)")
            }
        
        }
    
        outputURL = tempURL()
        movieOutput.startRecording(to: outputURL,recordingDelegate: self)
    
        }
        else {
            stopRecording()
        }

   }


//Will play video after recording video

class PlayBackRecordedVideo: UIViewController {

let avPlayer = AVPlayer()
var avPlayerLayer: AVPlayerLayer!
var videoURL: URL!

@IBOutlet weak var videoPlayBack: UIView!



override func viewDidLoad() {
    super.viewDidLoad()

        avPlayerLayer = AVPlayerLayer(player: avPlayer)
        avPlayerLayer.frame = view.bounds
        avPlayerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
        videoPlayBack.layer.insertSublayer(avPlayerLayer,at: 0)
    
        view.layoutIfNeeded()
    
        let playerItem = AVPlayerItem(url: videoURL as URL)
        avPlayer.replaceCurrentItem(with: playerItem)
        print("This is \(videoURL)")
    
        avPlayer.play()
}

解决方法

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