UIImagePickerController取消按钮无法正常工作的问题

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        let imagePickerController = UIImagePickerController()
        imagePickerController.delegate = self

        let cancelButton = UIBarButtonItem(title: "取消", style: .plain, target: self, action: #selector(cancelButtonTapped))
        imagePickerController.navigationItem.leftBarButtonItem = cancelButton

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

    @objc func cancelButtonTapped() {
        dismiss(animated: true, completion: nil)
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        // 处理选中的图片
        picker.dismiss(animated: true, completion: nil)
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        // 取消选择图片
        picker.dismiss(animated: true, completion: nil)
    }
}