从 AvcaputrePhotoOutout 捕获照片以放置在 imageview 上

如何解决从 AvcaputrePhotoOutout 捕获照片以放置在 imageview 上

我希望我的 swift 代码拍摄一张照片并将其放在 imageview pic 上。你可以看到我在 func take Photo 中做了什么。该代码在调用时导致运行时错误我不知道在代码中放置什么以使其不会导致运行时错误并拍摄照片并将其放置在 imageview pic 上。我想我在下面有大部分需要的代码。

import UIKit;import AVFoundation

class ViewController: UIViewController {

    var b1 = UIButton()
    var pic = UIImageView()
    var caputreSession = AVCaptureSession()
    var backCamera : AVCaptureDevice?
    var frontCamera : AVCaptureDevice?
    var currentCamera: AVCaptureDevice?
    var photoOutput : AVCapturePhotoOutput?
    var image : UIImage?
    var captureSESSION = AVCaptureSession()
    
    var cameraPreviewLayer : AVCaptureVideoPreviewLayer?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        
        setupCaputerSession()
        setUpDevice()
        setupinput()
        setUpPreivewLayer()
        startRunningCaptiureSessions()
        
        
        
        [b1,pic].forEach{
            
            $0.translatesAutoresizingMaskIntoConstraints = false
            view.addSubview($0)
            
        }
        pic.backgroundColor = .purple
        b1.backgroundColor = .orange
        b1.frame = CGRect(x: 100,y: 100,width: 100,height: 100)
        b1.addTarget(self,action: #selector(takePHoto),for: .touchDown)
        cameraPreviewLayer?.frame = CGRect(x: 100,y: 300,width: 200,height: 200)
        
        pic.frame = CGRect(x: 100,y: 500,height: 100)
    }
    
    
    func setupCaputerSession (){
        captureSESSION.sessionPreset = AVCaptureSession.Preset.photo
    }
    func setUpDevice(){
        let devicediscoverySession =     AVCaptureDevice.discoverySession(deviceTypes:[AVCaptureDevice.DeviceType.builtInWideAngleCamera],mediaType: AVMediaType.video,position: AVCaptureDevice.Position.unspecified)
        
        let devices = devicediscoverySession.devices
        
        for device in devices {
            if device.position == AVCaptureDevice.Position.back {
                backCamera = device
            }
            else if device.position == AVCaptureDevice.Position.front {
                frontCamera = device
            }
            
        }
        
        currentCamera = backCamera
        
    }
    func setupinput(){
        
        
        do {
            let captureDeviceInput = try AVCaptureDeviceInput(device: currentCamera!)
            caputreSession.addInput(captureDeviceInput)
            photoOutput = AVCapturePhotoOutput()
            photoOutput?.setPreparedPhotoSettingsArray([AVCapturePhotoSettings(format: [AVVideoCodecKey :  AVVideoCodecType.jpeg])],completionHandler: nil)
            captureSESSION.addOutput(photoOutput!)
        }
        catch{
            print(error)
        }
    }
    func setUpPreivewLayer(){
        
        
        cameraPreviewLayer = AVCaptureVideoPreviewLayer(session: caputreSession)
        cameraPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
        cameraPreviewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
        cameraPreviewLayer?.frame = self.view.frame
        self.view.layer.insertSublayer(cameraPreviewLayer!,at: 0)
    }
    func startRunningCaptiureSessions(){
        
        caputreSession.startRunning()
        
    }
    
    @objc func takePHoto(){
        
        let settings = AVCapturePhotoSettings()
        photoOutput?.capturePhoto(with: settings,delegate: self)
        

        
     pic.image =    photoOutput?.capturePhoto(with: settings,delegate: self)
   
    }
    
    
}
extension ViewController : AVCapturePhotoCaptureDelegate {
    func photoOutput(_ output: AVCapturePhotoOutput,didFinishProcessingPhoto photo: AVCapturePhoto,error: Error?) {
        if let imageData = photo.fileDataRepresentation(){
            
            image = UIImage(data: imageData)
            
                    let vc = previewVC()
                    vc.modalPresentationStyle = .overCurrentContext // actually .fullScreen would be better
                    self.present(vc,animated: true)
            
                    
                    vc.image = self.image
        }
        
    }
    
}