Xcode ViewController更改问题

// 使用Navigation Controller跳转
let secondViewController = SecondViewController()
self.navigationController?.pushViewController(secondViewController, animated: true)

// 模态展示ViewController
let modalViewController = ModalViewController()
modalViewController.modalPresentationStyle = .fullScreen
self.present(modalViewController, animated: true, completion: nil)

// 通过构造函数传递数据
class SecondViewController: UIViewController {
    var data: String?

    init(data: String) {
        self.data = data
        super.init(nibName: nil, bundle: nil)
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

// 使用闭包回调
class FirstViewController: UIViewController {
    func goToSecondViewController() {
        let secondViewController = SecondViewController()
        secondViewController.completionHandler = { [weak self] result in
            // 处理回调结果
        }
        self.navigationController?.pushViewController(secondViewController, animated: true)
    }
}

class SecondViewController: UIViewController {
    var completionHandler: ((String) -> Void)?

    func someAction() {
        completionHandler?("Data from SecondViewController")
    }
}

override func viewDidLoad() {
    super.viewDidLoad()
    // 遵守内存管理规则，例如取消订阅通知、清理定时器等
}

deinit {
    // 清理工作
    NotificationCenter.default.removeObserver(self)
    timer?.invalidate()
    timer = nil
}