Question

我足够新用Xamarin，在我的Xamarin Forms项目中我创建了一个Master-Detail页面，在ListView中代表我想要放置标题和图标的菜单，对于图标图像，我必须插入每个所有设备项目中的图标？

我也有一个小问题，当我点击菜单项并导航到所选的详细信息页面时，汉堡包菜单消失

MainPageMaster.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="XXX"
             Title="Master">
  <StackLayout>
    <ListView x:Name="MenuItemsListView"
              SeparatorVisibility="None"
              HasUnevenRows="true"
              ItemsSource="{Binding MenuItems}">
      <ListView.Header>
        <Grid BackgroundColor="#03A9F4">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="6"/>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="6"/>
          </Grid.ColumnDefinitions>
          <Grid.RowDefinitions>
            <RowDefinition Height="15"/>
            <RowDefinition Height="30"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="10"/>
          </Grid.RowDefinitions>
          <Label
              Grid.Column="1"
              Grid.Row="1"
              Text="B1 Term"
              HorizontalTextAlignment="Center"
              Style="{DynamicResource SubtitleStyle}"/>
        </Grid>
      </ListView.Header>
      <ListView.ItemTemplate>
        <DataTemplate>
          <ViewCell>
              <StackLayout VerticalOptions="FillAndExpand"
                             Orientation="Horizontal"
                             Padding="20,10,0,10"
                             Spacing="20">
                            <Image Source="{Binding Icon}"
                         WidthRequest="40"
                         HeightRequest="40"
                         VerticalOptions="Center" />
                            <Label Text="{Binding Title}"
                         FontSize="Medium"
                         VerticalOptions="Center"
                         TextColor="Black"/>
            </StackLayout>
          </ViewCell>
        </DataTemplate>
      </ListView.ItemTemplate>
    </ListView>
  </StackLayout>
</ContentPage>

档案.cs

[XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class MainPageMaster : ContentPage
    {
        public ListView ListView;

        public MainPageMaster()
        {
            InitializeComponent();

            BindingContext = new MainPageMasterViewModel();
            ListView = MenuItemsListView;
        }

        class MainPageMasterViewModel : INotifyPropertyChanged
        {
            public ObservableCollection<MainPageMenuItem> MenuItems { get; set; }

            public MainPageMasterViewModel()
            {
                MenuItems = new ObservableCollection<MainPageMenuItem>(new[]
                {
                    new MainPageMenuItem { Id = 0, Icon="ic_menu_home.png",Title = "Home", TargetType = typeof(MainPageDetail) },
                    new MainPageMenuItem { Id = 1, Title = "Elenco Clienti", TargetType = typeof(ElencoClientiPage) },
                    new MainPageMenuItem { Id = 2, Title = "Logout", TargetType = typeof(LogOut) }
                });
            }

            #region INotifyPropertyChanged Implementation
            public event PropertyChangedEventHandler PropertyChanged;
            void OnPropertyChanged([CallerMemberName] string propertyName = "")
            {
                if (PropertyChanged == null)
                    return;

                PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
            }
            #endregion
        }
    }

屏幕

在此图片中，我的图标不可见，但我在Android项目中添加了图片

Answer 1

创建主详情页面：

添加内容页面并按如下方式更改代码：

<强> RootPage.xaml

<?xml version="1.0" encoding="utf-8"?>
<MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms" 
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
              xmlns:local="clr-namespace: your_NameSpace"
              x:Class="your_NameSpace.RootPage">
</MasterDetailPage>

<强> RootPage.xaml.cs

[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class RootPage : MasterDetailPage
{
    public RootPage()
    {                        
        InitializeComponent();
    }
}

创建菜单页面：

添加其他内容页面并按如下方式更改代码：

MenuPage.xaml （实际汉堡包菜单的设计）

<?xml version="1.0" encoding="UTF-8"?>
<ContentPage BackgroundColor="White"
         xmlns="http://xamarin.com/schemas/2014/forms" 
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
         x:Class="your_NameSpace.MenuPage">
<ContentPage.Padding >
    <OnPlatform x:TypeArguments="Thickness" iOS=" 0 , 20 , 0 , 0" />
</ContentPage.Padding>  
<ContentPage.Content>
    <StackLayout BackgroundColor="White" Padding ="10 , 30 , 10, 10">
        <Button Text="Login" BackgroundColor="White" TextColor="DarkGray" HorizontalOptions="StartAndExpand" Command="{Binding GoHomeCommand}" />
        <BoxView HeightRequest="0.5" HorizontalOptions="FillAndExpand" BackgroundColor="Gray"/>            
        <Button Text="Search" BackgroundColor="White" TextColor="DarkGray" HorizontalOptions="StartAndExpand" Command="{Binding GoSecondCommand}" />
        <BoxView HeightRequest="0.5" HorizontalOptions="FillAndExpand" BackgroundColor="Gray"/>
        <Button Text="Browse" TextColor="DarkGray" BackgroundColor="White" HorizontalOptions="StartAndExpand" Command="{Binding GoThirdCommand}"/>
        <BoxView HeightRequest="0.5" HorizontalOptions="FillAndExpand" BackgroundColor="Gray"/>
    </StackLayout>
</ContentPage.Content>

<强> MenuPage.xaml.cs

 [XamlCompilation(XamlCompilationOptions.Compile)]
public partial class MenuPage : ContentPage
{
    public MenuPage()
    {
        BindingContext = new MenuPageViewModel();
        this.Icon = "yourHamburgerIcon.png"; //only neeeded for ios
        InitializeComponent();
    }
}

其模型类：

这是菜单页面的按钮点击命令绑定在

中的位置

<强> MenuPageViewModel.cs

 public class MenuPageViewModel
{
    public ICommand GoHomeCommand { get; set; }
    public ICommand GoSecondCommand { get; set; }
    public ICommand GoThirdCommand { get; set; }
    public MenuPageViewModel()
    {
        GoHomeCommand = new Command(GoHome);
        GoSecondCommand = new Command(GoSecond);
        GoThirdCommand = new Command(GoThird);
    }

    void GoHome(object obj)
    {
        App.NavigationPage.Navigation.PopToRootAsync();
        App.MenuIsPresented = false;
    }

    void GoSecond(object obj)
    {
        App.NavigationPage.Navigation.PushAsync(new Home()); //the content page you wanna load on this click event 
        App.MenuIsPresented = false;
    }

    void GoThird(object obj)
    {
        App.NavigationPage.Navigation.PushAsync(new ClinicInformation());
        App.MenuIsPresented = false;
    }
}

通常在应用程序类中添加以下属性，应用程序类的名称为App.xaml和App.xaml.cs

将以下内容添加到App.xaml.cs：

    public static NavigationPage NavigationPage { get; private set; }
    public static RootPage RootPage;
    public static bool MenuIsPresented
    {
        get
        {
            return RootPage.IsPresented;
        }
        set
        {
            RootPage.IsPresented = value;
        }
    }

这里RootPage是主 - 详细信息页面的静态实例， NavigationPage是您更改以更改详细信息页面的详细信息页面， IsMenuPresentend是bool，而不是true时保持MenuPage打开，当false关闭时。

完成所有这些后，在您的应用程序类中添加此函数，并在其App.Xaml.cs的构造函数中调用它

 private void CallMain()
 {
    var menuPage = new MenuPage();
    NavigationPage = new NavigationPage(new Home());
    RootPage = new RootPage();
    RootPage.Master = menuPage;
    RootPage.Detail = NavigationPage;
    MainPage = RootPage;
 }

在您的Android项目中添加以下主题：

<强>值/ styles.xml

<?xml version="1.0" encoding="utf-8" ?>
<resources>
<style name="MyTheme" parent="MyTheme.Base">
</style>

<style name="DrawerArrowStyle" 
parent="@style/Widget.AppCompat.DrawerArrowToggle">
<item name="spinBars">true</item>
 <item name="color">#FFFFFF</item>
</style>

<style name="MyTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="windowNoTitle">true</item>
<item name="windowActionBar">false</item>
<item name="colorPrimary">#003399</item>
<item name="colorPrimaryDark">#003399</item>
<item name="colorControlHighlight">#003399</item>
<item name="colorAccent">#012348</item>
<item name="drawerArrowStyle">@style/DrawerArrowStyle</item>
</style>

</resources>

创建名为values-v21的文件夹并添加名为styles.xml的XML并向其添加以下代码：

 <?xml version="1.0" encoding="utf-8" ?>
 <resources>
 <style name="MyTheme" parent="MyTheme.Base">
 <item name="android:windowContentTransitions">true</item>
 <item name="android:windowAllowEnterTransitionOverlap">true</item>
 <item name="android:textAllCaps">false</item>
 <item name="android:windowAllowReturnTransitionOverlap">true</item>
 <item name="android:windowSharedElementEnterTransition">@android:transition/move</item>
 <item name="android:windowSharedElementExitTransition">@android:transition/move</item>
 </style>
 </resources>

在所有Android活动中使用名称myTheme作为应用主题。

如果您有任何疑问可以随意评论，那么您的汉堡包菜单就完整了。

祝你好运！

快乐编码。

Answer 2

您也可以尝试此操作以获取详细信息

Hamburger Menu tutorial

Answer 3

要在Android和iOS应用程序中显示Humberger菜单图标，可以使用Title = "☰"特殊字符。这样可以正确显示菜单图标。

<MasterDetailPage.Master>  
    <ContentPage Title = "☰" BackgroundColor="Red">  
        <StackLayout BackgroundColor = "#B2EC5D" >
            < ListView x:Name="navigationDrawerList">                   
            </ListView>  
        </StackLayout>  
    </ContentPage>  
</MasterDetailPage.Master>

汉堡菜单Xamarin表格（MasterDetailPage）

3 个答案: