如何使用Xamarin.Forms创建抽屉/滑块菜单？

Question

如何使用Xamarin.Forms创建滑块菜单？它是烤制的还是定制的？

Answer 1

您创建一个包含所有定义两个法师一个新的类-即在菜单 -和细节-即主要页面.我知道,它听起来像是背靠背,但是例如......

using System;
using Xamarin.Forms;

namespace testXamForms
 {
   public class HomePage : MasterDetailPage
   {
   public HomePage()
   {
     // Set up the Master, i.e. the Menu

     Label header = new Label
     {
       Text = "MENU",
       Font = Font.BoldSystemFontOfSize(20),
       HorizontalOptions = LayoutOptions.Center
     };
    // create an array of the Page names
     string[] myPageNames = {
       “Main”,
       “Page 2”,
       “Page 3”,
     };

     // Create ListView for the Master page.
     ListView listView = new ListView
     {
       ItemsSource = myPageNames,
     };

     // The Master page is actually the Menu page for us
    this.Master = new ContentPage
     {
       Title = "The Title is required.",
       Content = new StackLayout
       {
         Children = 
         {
           header, 
           listView
         },
       }
     };

     // Define a selected handler for the ListView contained in the Master (ie Menu) Page.

     listView.ItemSelected += (sender, args) =>
     {
       // Set the BindingContext of the detail page.
       this.Detail.BindingContext = args.SelectedItem;
        Console.WriteLine("The args.SelectedItem is
       {0}",args.SelectedItem);


     // This is where you would put your “go to one of the selected pages” 

       // Show the detail page.
       this.IsPresented = false;
     };
    // Set up the Detail, i.e the Home or Main page.
     Label myHomeHeader = new Label
     {
       Text = "Home Page",
       HorizontalOptions = LayoutOptions.Center
     };

     string[] homePageItems = { “Alpha”, “Beta”, “Gamma” };
     ListView myHomeView = new ListView {
       ItemsSource = homePageItems,
     };

     var myHomePage = new ContentPage();
     myHomePage.Content = new StackLayout
     {
       Children = 
       {
         myHomeHeader, 
         myHomeView
       } ,
     };
     this.Detail = myHomePage;
   }  
   }
 }

Answer 2

它内置于:MasterDetailPage.你会设置Detail和Master它的属性,你想要什么类型的网页.我发现Hansleman.Forms非常具有启发性.

Answer 3

我最小的例子(如贴在这里)如下:

public class App
{
    static MasterDetailPage MDPage;

    public static Page GetMainPage()
    {
        return MDPage = new MasterDetailPage {
            Master = new ContentPage {
                Title = "Master",
                BackgroundColor = Color.Silver,
                Icon = Device.OS == TargetPlatform.iOS ? "menu.png" : null,
                Content = new StackLayout {
                    Padding = new Thickness(5, 50),
                    Children = { Link("A"), Link("B"), Link("C") }
                },
            },
            Detail = new NavigationPage(new ContentPage {
                Title = "A",
                Content = new Label { Text = "A" }
            }),
        };
    }

    static Button Link(string name)
    {
        var button = new Button {
            Text = name,
            BackgroundColor = Color.FromRgb(0.9, 0.9, 0.9)
        };
        button.Clicked += delegate {
            MDPage.Detail = new NavigationPage(new ContentPage {
                Title = name,
                Content = new Label { Text = name }
            });
            MDPage.IsPresented = false;
        };
        return button;
    }
}

示例解决方案托管在GitHub上.

在iOS上,结果如下所示(左:菜单打开,右:点击"B"后):

请注意,您需要将菜单图标添加为iOS项目中的资源.

Answer 4

如果您正在寻找MasterDetailPage的简单示例,请在GitHub上查看我的样本回购.这里也提供了很好的例子