Xamarin.ios登录页，无法更改故事板的第一页

我正在使用xamarin.ios创建一个应用程序。我的故事板中有一些页面，我已经将其中一个页面的“Is initial View Controller”设置为第一个页面。 如果用户已经登录，则将该页面视为第一页，否则我希望显示登录页面。为此，我添加了以下代码：

        [Export ("application:didFinishLaunchingWithOptions:")]
        public bool FinishedLaunching (UIApplication application, NSDictionary launchOptions)
        {
            this.Window = new UIWindow(UIScreen.MainScreen.Bounds);
            LoginViewController yourViewController = UIStoryboard.FromName("Main", NSBundle.MainBundle).InstantiateViewController("LoginViewController") as LoginViewController;

            this.Window.RootViewController = yourViewController;
            this.Window.MakeKeyAndVisible();
            return true;
        }

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问题是，此代码根本无法更改第一页。我的应用程序似乎总是忽略这段代码，并在情节提要上显示“Is Initial View controller”等于true的页面。这意味着当我在故事板上更改第一页时，我看到了更改，但在代码中设置时没有更改。

应用程序代理的角色从iOS 12更改为iOS 13，应用程序代理负责设置应用程序的场景：

[Export ("scene:willConnectToSession:options:")]
public void WillConnect (UIScene scene, UISceneSession session, UISceneConnectionOptions connectionOptions)
{
    // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
    // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
    // This delegate does not imply the connecting scene or session are new (see UIApplicationDelegate `GetConfiguration` instead).

    UIWindowScene myScene = scene as UIWindowScene;
    Window = new UIWindow(myScene);
    UIViewController viewController = new UIViewController();
    UINavigationController navigationMain = new UINavigationController(viewController );
    Window.RootViewController = navigationMain;
    Window.MakeKeyAndVisible();
}

以下是swift中关于这个问题的一些线索：和

---

和文章：和

应用程序代理的角色从iOS 12更改为iOS 13，负责设置应用程序的场景：

[Export ("scene:willConnectToSession:options:")]
public void WillConnect (UIScene scene, UISceneSession session, UISceneConnectionOptions connectionOptions)
{
    // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
    // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
    // This delegate does not imply the connecting scene or session are new (see UIApplicationDelegate `GetConfiguration` instead).

    UIWindowScene myScene = scene as UIWindowScene;
    Window = new UIWindow(myScene);
    UIViewController viewController = new UIViewController();
    UINavigationController navigationMain = new UINavigationController(viewController );
    Window.RootViewController = navigationMain;
    Window.MakeKeyAndVisible();
}

以下是swift中关于这个问题的一些线索：和

---

和文章：和

您是否使用iOS13在模拟器中测试代码？是的，我是这样做的。我用的是windows模拟器。你用iOS13在模拟器中测试你的代码吗？是的，我用。我使用windows模拟器。