如何將 AVCaptureVideoPrevieweLayer 添加到 swift 的視圖中？

Question

我有一個 AVCaptureVideoPreviewLayer，我想將它從我的 storyboard 添加到 UIView（就像@IB 的東西）。 我將如何 go 這樣做？

這是我的 AVCaptureVideoPreviewLayer 的代碼：

import UIKit
import AVFoundation

class ViewController: UIViewController, PreviewDelegate {

    var cameraPreviewLayer: AVCaptureVideoPreviewLayer!
    @IBOutlet weak var topBorder: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        // Functions for capturing image
        setupCaptureSession()
        setupDevice()
        setupInputOutput()
        setupPreviewLayer()
        startRunningCaptureSession()

        super.viewDidLoad();

    }

    func setupPreviewLayer() {
        cameraPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
        cameraPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspect
        cameraPreviewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
        cameraPreviewLayer?.frame = self.view.frame
        self.view.layer.insertSublayer(cameraPreviewLayer!, at: 0)

        cameraPreviewLayer?.anchorPoint = CGPoint(x: 0, y: 0)
        cameraPreviewLayer?.position = CGPoint(x: 0, y: topBorder.frame.height)

    }
}

Answer 1

請嘗試以下代碼：

    cameraPreviewLayer = AVCaptureVideoPreviewLayer(session: session)
    cameraPreviewLayer?.videoGravity = .resizeAspectFill
    cameraPreviewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
    cameraPreviewLayer?.zPosition = -1
    cameraPreviewLayer?.frame = containerView.layer.bounds

    self.view.layer.insertSublayer(cameraPreviewLayer!, at: 0)