Swift-自定义覆盖上的重拍按钮( UIImagePickerController )

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    let imagePicker = UIImagePickerController()
    let customOverlayView = UIView()
    let retakeButton = UIButton(type: .system)
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        imagePicker.delegate = self
        imagePicker.sourceType = .camera
        imagePicker.showsCameraControls = false
        
        // 创建自定义覆盖视图
        customOverlayView.frame = imagePicker.cameraOverlayView?.frame ?? CGRect.zero
        
        // 创建重拍按钮
        retakeButton.setTitle("重拍", for: .normal)
        retakeButton.addTarget(self, action: #selector(retakeButtonTapped), for: .touchUpInside)
        retakeButton.frame = CGRect(x: 20, y: customOverlayView.frame.height - 70, width: 60, height: 40)
        
        // 将重拍按钮添加到自定义覆盖视图
        customOverlayView.addSubview(retakeButton)
        
        // 设置自定义覆盖视图为相机的覆盖视图
        imagePicker.cameraOverlayView = customOverlayView
    }
    
    @objc func retakeButtonTapped() {
        imagePicker.takePicture()
    }
    
    // UIImagePickerControllerDelegate方法
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        // 处理拍摄的照片
    }
    
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        // 用户取消拍摄或选择照片
    }
    
    // 在适当的地方调用以下代码来显示相机界面
    // present(imagePicker, animated: true, completion: nil)
}