嵌套在ContentFrame

Question

我在项目中创建第二个NavigationView实例时遇到问题。在学习UWP时，我一直在广泛使用AppUIBasics，并注意到按照此示例，它在Frames中嵌套了NavigationViews：

我一直无法复制它。

我的用例如下：

• 我加载程序，它会在左侧创建主NavView
• 我单击设置AppBarButton，它将主导航视图ContentFrame更改为SettingsPage.xaml页面
• SettingsPage具有顶部NavigationView，可让我在不同的设置之间滑动，但当前未在启动时显示。

Id不会引发任何语法错误或XAML错误，但我不确定是怎么回事 我选择了我认为有用的东西：

主页导航XAML

<!-- Navigation view Variable decleration -->
    <NavigationView IsSettingsVisible="False" 
                        PaneTitle="Menu"                            
                        x:Name="NavView" 
                        Loaded="NavView_Loaded"
                        IsBackButtonVisible="Collapsed" 
                        PaneDisplayMode="Left" 
                        PaneClosed="NavView_PaneClosed"
                        AlwaysShowHeader="True"        
                        SelectionChanged="NavView_SelectionChanged" Foreground="{StaticResource DefaultTextColour}">

        <!-- All navigation view Items nested within here -->
        <NavigationView.MenuItems>                

// Removed un-necessary menuitems here

        </NavigationView.MenuItems>

        <!-- Navigation pane footer -->
        <NavigationView.PaneFooter>
            <StackPanel Orientation="Vertical" Margin="0,0,0,0" HorizontalAlignment="Stretch" VerticalAlignment="Center">
                <StackPanel Orientation="Horizontal" x:Name="AppBarButtons" Tag="AppBarButtonPanel" Visibility="{Binding ElementName=NavView, Path=IsPaneOpen}" Margin="16,0,16,0" Height="50"> 

// THIS IS THE NAVIGATION TO THE SETTINGS PAGE

                    <AppBarButton Icon="Setting" Margin="1, 2, 0, 0" Tag="Settings_Page" HorizontalAlignment="Center" Width="56.5" Height="40.5" ClickMode="Press" Click="SettingsButton_Click" ToolTipService.ToolTip="Budget Settings"/>       
                </StackPanel>               
            </StackPanel>
        </NavigationView.PaneFooter>

        <!-- Defining the ContentFrame Transition effect-->
        <Frame x:Name="ContentFrame">             

主页导航XAML（仅设置按钮）

// BUTTON CLICK HANDLERS HERE
        private void SettingsButton_Click(object sender, RoutedEventArgs e)
        {
            ContentFrame.Navigate(typeof(Content_Pages.SettingsPage));
            NavView.IsPaneOpen = false;
        }

Settings_Page XAML

  <Grid>      

        <muxcontrols:NavigationView PaneDisplayMode="Top" 
                    IsBackButtonVisible="Collapsed" 
                    IsSettingsVisible="False" 
                    x:Name="SettingNavView" 
                    SelectionChanged="SettingNavView_SelectionChanged"
                    Foreground="{StaticResource DefaultTextColour}"                    
                    Grid.Row="0">
            <NavigationView.MenuItems>
                <NavigationViewItem Content="File Properties" x:Name="FileProperties" Tag="FileProperties_Page"/>
                <NavigationViewItem Content="UI Customisation" x:Name="UICustomisation" Tag="UICustomisation_Page"/>
            </NavigationView.MenuItems>

        </muxcontrols:NavigationView>

        <Frame x:Name="SettingsContent"/>

    </Grid>

设置页面代码背后：

public sealed partial class SettingsPage : Page
    {
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            // Navigate to the Home Page
            Frame.Navigate(typeof(Content_Pages.SettingsPageContent.FileProperties_Page));
        }

        private void SettingNavView_SelectionChanged(NavigationView sender, NavigationViewSelectionChangedEventArgs args)
        {
            NavigationViewItem item = args.SelectedItem as NavigationViewItem;

            if(item != null)
            {
                switch (item.Tag.ToString())
                {
                    case "FileProperties_Page":
                        SettingsContent.Navigate(typeof(Content_Pages.SettingsPageContent.FileProperties_Page));
                        break;
                    case "UICustomisation_Page":
                        SettingsContent.Navigate(typeof(Content_Pages.SettingsPageContent.UICustomisation_Page));
                        break;
                }
            }
        }
    }

如果我没有提供太多信息，请告诉我。我将其重新添加。如果需要进一步说明，请告诉我。