Xamarin形成母版详细信息将母版保留在左侧 [英] Xamarin Forms Master Detail Keep Master on the left

问题描述

我试图始终将主页"(菜单)保持在我的MasterDetailPage"的左侧，我不希望导航使用户离开MasterDetailPage并使用户按下后退"按钮来返回.

I am trying to keep the Master page (menu) to the left of My MasterDetailPage at all times, I do not want the navigation to take the user away from the MasterDetailPage and make the user press a back button to get back.

我正在看左侧的传统汉堡栏菜单，只需更改详细信息"页面并将主菜单保持在原位即可.

I am looking a traditional burger bar menu to the left that simply changes the Detail page and keeps the master in place.

我现在所拥有的:

public partial class App : Application
{
    public static NavigationPage NavPage { get; private set; }
    private static RootPage RootPage;
    public static bool MenuIsPresented
    {
        get
        {
            return RootPage.IsPresented;
        }
        set
        {
            RootPage.IsPresented = value;
        }
    }
    public App()
    {
        InitializeComponent();
        MenuPage menuPage = new MenuPage();
        NavPage = new NavigationPage(new FirstPage());
        RootPage = new RootPage();
        RootPage.Master = menuPage;
        RootPage.Detail = NavPage;
        MainPage = RootPage;

    }
...
}

还有我的ViewModel命令

And my ViewModel Command

async void GoSecondPageAsync(object obj)
    {
        await App.NavPage.PushAsync(new SecondPage());
        App.MenuIsPresented = false;
    }

但这只是在堆栈顶部创建一个新页面，并带有一个返回到MasterDetailPage的后退按钮，而我所希望的只是停留在MasterDetailPage中.

But this just creates a new page on top of the stack with a back button back to the MasterDetailPage, while all I want is to stay within the MasterDetailPage.

推荐答案

您可以推送新页面，而只需从NavigationStack中删除第一个页面即可.例如:

You can push the new page and just remove the first one from the NavigationStack For example:

async void GoSecondPageAsync(object obj)
{
    await App.NavPage.PushAsync(new SecondPage());
    var removePage = App.NavPage.Navigation.NavigationStack[0];
    App.NavPage.Navigation.RemovePage(removePage);
    App.MenuIsPresented = false;
}

尽管，如果您始终只想替换页面，您是否真的甚至需要NavigationPage，也不能只设置RootPage.Detail=new SecondPage();

Although, if you just always want to replace the page do you really even need the NavigationPage and can't you just set the RootPage.Detail=new SecondPage();

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