如何以编程方式显示带有导航栏的ViewController？

import UIKit

class MyViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        self.title = "My View Controller"
    }
}

let myViewController = MyViewController()
let navigationController = UINavigationController(rootViewController: myViewController)

navigationController.navigationBar.barTintColor = UIColor.blue
navigationController.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]

UIApplication.shared.keyWindow?.rootViewController = navigationController