在UIImagePickerController中获取相机预览的图像表示

import UIKit
import AVFoundation

let imagePickerController = UIImagePickerController()
imagePickerController.sourceType = .camera

let photoOutput = AVCapturePhotoOutput()

let captureSession = AVCaptureSession()
captureSession.addOutput(photoOutput)

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
        guard let image = info[.originalImage] as? UIImage else { return }
        // 在这里处理获取到的图像
    }
    
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        picker.dismiss(animated: true, completion: nil)
    }
}

captureSession.startRunning()

present(imagePickerController, animated: true, completion: nil)