如何减少xamarin forms uwp平台中汉堡菜单的宽度

Question

我使用主详细信息页面在 xamarin 表单中创建了一个汉堡菜单。但是我无法在 uwp 平台中减小汉堡菜单的宽度。请让我知道是否有办法减小宽度或者它是汉堡菜单占用的默认宽度。

这是主页面的代码：

<MasterDetailPage.Master>
    <local:SideDrawerListPage x:Name="sideDrawerListPage" WidthRequest="100" />
</MasterDetailPage.Master>

侧抽屉列表代码：

 <Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="*" />
    </Grid.RowDefinitions>
    <Grid Grid.Row="0">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="120" />
        </Grid.RowDefinitions>
        <Image Grid.Row="0"  Source="menu.png" HorizontalOptions="Center" WidthRequest="100" HeightRequest="60" Margin="0,2,0,0"/>
    <Grid Grid.Row="1" Padding="20" Margin="5,0,0,0" ColumnSpacing="0" RowSpacing="0" HeightRequest="75">
        <Grid.RowDefinitions>
            <RowDefinition Height="75"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition Width="2*"/>
        </Grid.ColumnDefinitions>            
              ------------------
    </Grid>

    <Grid Grid.Row="2" BackgroundColor="{Binding SelectedBackgroundColorA}" HeightRequest="45" RowSpacing="0" ColumnSpacing="0">         
        --------
    </Grid>
    <Grid Grid.Row="3" BackgroundColor="{Binding SelectedBackgroundColorB}" HeightRequest="45" RowSpacing="0" ColumnSpacing="0">
        --------           
    </Grid>
    <Grid Grid.Row="4">
            <ListView x:Name="listView" VerticalOptions="FillAndExpand" Margin="0,-8,0,-10" IsVisible="{Binding IsChildListVisible}" x:FieldModifier="public" ItemsSource="{Binding DashboardListItems}" BackgroundColor="#3c4a56">
        <ListView.ItemTemplate>
            <DataTemplate>
                <ViewCell>
                    <!--BackgroundColor="{Binding SelectedBackgroundColor}"-->
                            <Grid BackgroundColor="#3c4a56">
                        <Grid.GestureRecognizers>
                            <TapGestureRecognizer NumberOfTapsRequired="1" Command="{Binding Command}" CommandParameter="{Binding}"></TapGestureRecognizer>
                        </Grid.GestureRecognizers>
                        <Grid RowSpacing="0" ColumnSpacing="0">
                            ----------------
                        </Grid>
                    </Grid>
                </ViewCell>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
    </Grid>
    </Grid>

感谢任何帮助！

Answer 1

xamarin forms uwp平台如何减小汉堡菜单的宽度

与MasterDetailPage 匹配的控件是UWP 平台内的MasterDetailControl。它有风格资源。根据您的要求，您可以修改MasterDetailControl 的样式并减小PaneTogglePane 和ContentTogglePane 按钮的宽度。我会把完整的样式贴出来，你可以直接使用。

<Application.Resources>
    <ResourceDictionary>
        <Style TargetType="uwp:MasterDetailControl">
            <Setter Property="ToolbarForeground" Value="{ThemeResource DefaultTextForegroundThemeBrush}" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="uwp:MasterDetailControl">
                        <SplitView x:Name="SplitView" IsPaneOpen="{Binding IsPaneOpen,RelativeSource={RelativeSource TemplatedParent},Mode=TwoWay}" DisplayMode="Overlay">
                            <SplitView.Pane>
                                <Grid>
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="Auto" />
                                        <RowDefinition Height="*" />
                                    </Grid.RowDefinitions>
                                    <StackPanel Grid.Row="0" Orientation="Horizontal" Visibility="{TemplateBinding MasterToolbarVisibility}"  Background="{TemplateBinding ToolbarBackground}">
                                        <Button Name="PaneTogglePane" Style="{ThemeResource PaneButton}" Width="30" Foreground="{TemplateBinding ToolbarForeground}"
                                        AutomationProperties.Name="{Binding Path=(AutomationProperties.Name), RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"  
                                        AutomationProperties.HelpText="{Binding Path=(AutomationProperties.HelpText), RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"  
                                        AutomationProperties.LabeledBy="{Binding Path=(AutomationProperties.LabeledBy), RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"  
                                        AutomationProperties.AccessibilityView="{Binding Path=(AutomationProperties.AccessibilityView), RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"  />
                                        <TextBlock Margin="10,0,0,0" Style="{ThemeResource TitleTextBlockStyle}" VerticalAlignment="Center" Text="{TemplateBinding MasterTitle}" Visibility="{TemplateBinding MasterTitleVisibility}" Foreground="{TemplateBinding ToolbarForeground}"/>
                                    </StackPanel>
                                    <ContentPresenter x:Name="MasterPresenter" Grid.Row="1" Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Master}" />
                                </Grid>
                            </SplitView.Pane>
                            <SplitView.Content>
                                <Grid>
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="Auto" />
                                        <RowDefinition Height="*" />
                                        <RowDefinition Height="Auto" />
                                    </Grid.RowDefinitions>

                                    <Border x:Name="TopCommandBarArea" HorizontalAlignment="Stretch" Background="{TemplateBinding ToolbarBackground}">
                                        <uwp:FormsCommandBar x:Name="CommandBar" Background="{TemplateBinding ToolbarBackground}" MinHeight="{ThemeResource TitleBarHeight}" HorizontalAlignment="Stretch">
                                            <uwp:FormsCommandBar.Content>
                                                <Border x:Name="TitleArea" Height="{ThemeResource TitleBarHeight}" Visibility="{TemplateBinding DetailTitleVisibility}" HorizontalAlignment="Stretch">
                                                    <Grid x:Name="TitleViewPresenter" VerticalAlignment="Center" Background="{TemplateBinding ToolbarBackground}" HorizontalAlignment="Stretch">

                                                        <Grid.ColumnDefinitions>
                                                            <ColumnDefinition Width="Auto"/>
                                                            <ColumnDefinition Width="Auto"/>
                                                            <ColumnDefinition Width="Auto"/>
                                                            <ColumnDefinition Width="*"/>
                                                        </Grid.ColumnDefinitions>

                                                        <Button Grid.Column="0" Width="30" Name="ContentTogglePane" Style="{ThemeResource PaneButton}" Foreground="{TemplateBinding ToolbarForeground}"  
                                                        Visibility="{TemplateBinding ContentTogglePaneButtonVisibility}" />

                                                        <Image Grid.Column="1" Source="{TemplateBinding DetailTitleIcon}" />

                                                        <Border Grid.Column="2" Height="{ThemeResource TitleBarHeight}" Visibility="{TemplateBinding DetailTitleVisibility}">
                                                            <TextBlock Text="{TemplateBinding DetailTitle}" VerticalAlignment="Center" Margin="10,0,0,0" Foreground="{TemplateBinding ToolbarForeground}" Style="{ThemeResource TitleTextBlockStyle}" />
                                                        </Border>

                                                        <ContentPresenter Grid.Column="3" Content="{Binding DetailTitleView, RelativeSource={RelativeSource Mode=TemplatedParent}, Converter={StaticResource ViewToRenderer}}" Visibility="{TemplateBinding DetailTitleViewVisibility}" HorizontalAlignment="Stretch" />

                                                    </Grid>
                                                </Border>
                                            </uwp:FormsCommandBar.Content>
                                        </uwp:FormsCommandBar>
                                    </Border>

                                    <ContentPresenter x:Name="DetailPresenter" Grid.Row="1" Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Detail}" />

                                    <Border x:Name="BottomCommandBarArea" Grid.Row="2" HorizontalAlignment="Stretch"></Border>
                                </Grid>
                            </SplitView.Content>
                        </SplitView>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </ResourceDictionary>
</Application.Resources>

更新

抱歉，如果您想减少汉堡菜单，我想了解您的要求。您可以在上述样式中为SplitView 设置OpenPaneLength。

 ......
 <ControlTemplate TargetType="uwp:MasterDetailControl">
 <SplitView OpenPaneLength="100" x:Name="SplitView" 
 ......

请注意，我们需要在 uwp App.Xaml 中放置上述样式。

Answer 2

需要“TitleViewPresenter”或其子项的定义，或者在默认情况下从here 覆盖内容时将返回 null... 从而导致 MasterDetailControl.cs 崩溃

_titleViewPresenter = GetTemplateChild("TitleViewPresenter") as FrameworkElement;

Xaml：

 <ContentPresenter x:Name="TitleViewPresenter" Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=DetailTitleView}" />