ios - 如何在 xamarin IOS 中使用弹出导航

Question

我是 Xamarin IOS 的新手，我有一个项目需要这个弹出导航。

var navigation = new FlyoutNavigationController {
                    // Create the navigation menu
                    NavigationRoot = new RootElement ("Navigation") {
                        new Section ("Menu") {
                            new StringElement ("Recipe"),
                            new StringElement ("Recipe Basket"),
                            new StringElement ("Meal Planner"),
                            new StringElement ("Grocery List"),
                            new StringElement ("Social"),
                            new StringElement ("Videos"),
                            new StringElement ("News Feed"),
                            new StringElement ("Partners"),
                        }
                    },
                    // Supply view controllers corresponding to menu items:

                    ViewControllers = new [] {
                        new UIViewController { View = new UILabel { Text = "Animals (drag right)" } },
                        new UIViewController { View = new UILabel { Text = "Vegetables (drag right)" } },
                        new UIViewController { View = new UILabel { Text = "Minerals (drag right)" } },


                    },
                }; 

此代码仅显示 UILabel。我怎样才能将它发送到特定的 View Controller ？

请帮忙。

提前致谢。

Answer 1

按照 vinaykumar 所说的进行操作，但您还想从那些 UIViewController 中打开 FlyoutNavigationController，因此您必须将您创建的初始 Controller 传递给这些 Controller 。

否则如果你只是打开你的 View Controller ，你将无法再次获得菜单。

我像这样打开导航 Controller :

ViewDidLoad 中的 MainViewController:

        UIStoryboard board = UIStoryboard.FromName("MainStoryboard_iPhone", null);

        UINavigationController nav = (UINavigationController)board.InstantiateViewController("nav");
        SearchViewController searchVC = (SearchViewController)nav.ViewControllers[0];

         // Passing flyoutnavigation here
        searchVC.navigation = navigation;

        SettingsViewController settingsVC = (SettingsViewController)board.InstantiateViewController("settings");
        UINavigationController navSettings = new UINavigationController(settingsVC);

        // Passing flyoutnavigation here
        settingsVC.navigation = navigation;

        navigation.ViewControllers = new[]
        {
            nav,
            navSettings
        };

在其他 View Controller 中(在我的示例中为设置和搜索)，我有一个公共(public)变量来存储 FlyoutNavigationController(在 MainViewController 中设置)然后添加一个按钮以打开传递的 FlyoutNavigationController:

    // Set in MainViewController
    public FlyoutNavigationController navigation;

    public override void ViewDidLoad()
    {

        base.ViewDidLoad();

        // Add button to allow opening the FlyoutNavigationController
        NavigationItem.LeftBarButtonItem = new UIBarButtonItem(UIBarButtonSystemItem.Action, delegate
        {
            navigation.ToggleMenu();
        });
    }