Question

的AppDelegate

    window = new UIWindow (UIScreen.MainScreen.Bounds);
    navigationController = new UINavigationController();
    navigationController.SetNavigationBarHidden (true, true);

    loginViewController = new LoginViewController ();
    navigationController.AddChildViewController (loginViewController);

    if (validToken == true){
        Menu = new SlideoutNavigationController();
        Menu.MainViewController = new MainNavigationController(new DashBoardViewController(), Menu){ NavigationBarHidden = true };
        Menu.MenuViewController = new MenuNavigationController(new SettingViewController(), Menu) { NavigationBarHidden = true };
        navigationController.AddChildViewController (Menu);
    }

    window.RootViewController = navigationController;
    window.MakeKeyAndVisible ();
    return true;

应用程序的初始启动检查localToken，如果令牌存在则返回true，否则返回false。 if false loginViewController将在初始启动应用程序时加载。在成功认证后提供用户名和密码在代码下面运行。

Menu = new SlideoutNavigationController();
Menu.MainViewController = new MainNavigationController(new DashBoardViewController(), Menu){ NavigationBarHidden = true };
Menu.MenuViewController = new MenuNavigationController(new SettingViewController(), Menu) { NavigationBarHidden = true };
NavigationController.PushViewController (Menu, true);

在DashBoardViewController中有LogoutButton。 //应重定向到loginController屏幕。

btn_Logout.TouchUpInside += (sender, e) => {

    Console.WriteLine ("Back Pressed");
    this.NavigationController.PopViewControllerAnimated(true);
//  this.NavigationController.PopToRootViewController (true);
//  this.NavigationController.PopToViewController (this,true);
};

它停留在同一个viewController中，它是DashBoardViewController。想要在按下注销按钮时返回loginviewcontroller。

@All 在此先感谢

Answer 1

实际上，您正试图在viewControllers堆栈中没有LoginViewController的NavigationController中导航回来。所以你在AppDelegate中添加下一个代码

public void GoToLoginScreen()
{
    navigationController.PopToRootViewController(true);
}

并在btn_Logout.TouchUpInside事件中

btn_Logout.TouchUpInside += (sender, e) => 
{
    Console.WriteLine ("Back Pressed");
    (UIApplication.SharedApplication.Delegate as AppDelegate).GoToLoginScreen();
};

选择注销后导航回登录屏幕

1 个答案: