我是新手,可以使用 Xamarin,在我的 Xamarin Forms 项目中,我创建了一个主从页面,在代表菜单的 ListView 中,我想放置标题和图标,对于图标图像,我必须将每个图标插入所有设备项目?
而且我还有一个小问题,当我点击一个菜单项并导航到所选的详细信息页面时,汉堡包菜单消失了
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>
文件.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
在这张图片中,我的图标不可见,但我在 Android 项目中添加了一张图片
最佳答案
- 创建主从页面:
添加一个内容页面,修改代码如下:
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>
RootPage.xaml.cs
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class RootPage : MasterDetailPage
{
public RootPage()
{
InitializeComponent();
}
}
- 创建其菜单页面:
添加另一个内容页面并更改代码如下:
MenuPage.xaml(实际汉堡菜单的设计)
<?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>
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();
}
}
- 它的模型类:
这里是绑定(bind)菜单页的按钮点击命令的地方
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;
}
}
- 通常在您的应用程序类中添加以下属性,您的应用程序类的名称为 App.xaml 和 App.xaml.cs
将以下内容添加到您的 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 是主从页面的静态实例, NavigationPage 是你的详情页,你改变它来改变你的详情页, IsMenuPresentend 是 bool 值,当 true 保持 MenuPage 打开时和 false 关闭时相同。
完成所有这些后,将此函数添加到您的应用程序类中,并在您的 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:
values/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>
创建一个名为 values-v21 的文件夹并添加一个名为 styles.xml 的 XML 并向其中添加以下代码:
<?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>
并在您的所有 Android 事件中使用名称 myTheme 作为应用主题。
至此,您的汉堡包菜单已经完成,如果您有任何疑问,请随时发表评论。
祝你好运!
快乐编码。
关于xamarin - 汉堡包菜单 Xamarin Forms (MasterDetailPage),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49169049/