如何在swift中更改UIAlertAction中的文本左对齐

class LeftAlignedAlertAction: UIAlertAction {
    override func setValue(_ value: Any?, forKey key: String) {
        if key == "titleTextAlignment" {
            super.setValue(NSTextAlignment.left.rawValue, forKey: key)
        } else {
            super.setValue(value, forKey: key)
        }
    }
}

let alertController = UIAlertController(title: "标题", message: "消息", preferredStyle: .alert)

let leftAlignedAction = LeftAlignedAlertAction(title: "左对齐文本", style: .default) { (action) in
    // 处理左对齐文本按钮的点击事件
}

let cancelAction = UIAlertAction(title: "取消", style: .cancel, handler: nil)

alertController.addAction(leftAlignedAction)
alertController.addAction(cancelAction)

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