无法在tableview + uiimagepickerController中更新头像

// 在tableview cell中的布局代码
let avatarImageView = UIImageView(frame: CGRect(x: 10, y: 10, width: 50, height: 50))
cell.contentView.addSubview(avatarImageView)

// 在viewDidLoad方法中添加按钮或手势识别器
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(changeAvatar))
avatarImageView.addGestureRecognizer(tapGesture)

// 定义changeAvatar方法，用于处理头像的更改操作
@objc func changeAvatar() {
    let imagePicker = UIImagePickerController()
    imagePicker.delegate = self
    present(imagePicker, animated: true, completion: nil)
}

// 实现uiimagepickerController的代理方法
extension YourViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let pickedImage = info[.originalImage] as? UIImage {
            // 将选择的新头像图片更新到tableview的数据源中
            yourDataSource.avatarImage = pickedImage
            // 刷新tableview来显示新的头像
            yourTableView.reloadData()
        }
        dismiss(animated: true, completion: nil)
    }
}