如何在UIImageView中添加摄像头按钮

import UIKit
import AVFoundation

class ViewController: UIViewController {
    var imageView: UIImageView!
    var cameraButton: UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建UIImageView对象
        imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
        imageView.center = view.center
        imageView.backgroundColor = UIColor.gray
        view.addSubview(imageView)
        
        // 创建UIButton对象
        cameraButton = UIButton(type: .custom)
        cameraButton.setImage(UIImage(systemName: "camera"), for: .normal)
        cameraButton.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
        cameraButton.center = CGPoint(x: imageView.bounds.width / 2, y: imageView.bounds.height / 2)
        cameraButton.addTarget(self, action: #selector(cameraButtonTapped), for: .touchUpInside)
        imageView.addSubview(cameraButton)
    }
    
    @objc func cameraButtonTapped() {
        // 在这里实现摄像头按钮点击后的操作，例如打开摄像头、拍照或录像等
        // 使用AVFoundation框架来实现相关功能
    }
}