如何重用UIImagePickerController？

import UIKit

let imagePicker = UIImagePickerController()
imagePicker.delegate = self

imagePicker.sourceType = .camera // 从相机获取图片
// 或者
imagePicker.sourceType = .photoLibrary // 从相册获取图片

imagePicker.allowsEditing = true // 允许编辑图片
imagePicker.mediaTypes = ["public.image"] // 限制只能选择图片

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

extension YourViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let image = info[.editedImage] as? UIImage {
            // 处理编辑后的图片
        } else if let image = info[.originalImage] as? UIImage {
            // 处理原始图片
        }
        
        dismiss(animated: true, completion: nil)
    }
    
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        dismiss(animated: true, completion: nil)
    }
}