xamarin - 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？它是烘烤的还是定制的？

Answer 1

您创建一个新类，其中包含 Master（即菜单）和 Detail（即主页）的所有定义。我知道，这听起来从头到尾，但例如..

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. 您可以将它的Detail和Master属性设置为您想要的任何类型的页面。我发现Hansleman.Forms很有启发性。

Answer 3

我的最小示例（如在此处发布）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：单击“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，请查看我在GitHub 上的示例存储库。非常好的例子也在这里展示

Answer 5

Slideoverkit 是可用于 Xamarin Forms 的出色插件。有一个github可以查看免费示例，您可以在此处找到有关它的文档。