How to handle NavigationView PaneFooter Settings item click - xaml

Question

When adding a NavigationView a 'Settings' item is automatically added at the bottom of the NavigationView. How can a click event be added to this item since it doesn't appear to be accessible from XAML?
<Page
x:Class="My_Project.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:controls="using:Microsoft.Toolkit.Uwp.UI.Controls"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid>
<NavigationView>
<NavigationView.PaneFooter>
</NavigationView.PaneFooter>
</NavigationView>
</Grid>
</Page>

Answer 1

How can a click event be added to this item since it doesn't appear to be accessible from XAML?
The Settings button click event is already handled by the NavigationView.ItemInvoked Event. This is mentioned in the document NavigationView as "When the user taps on a navigation item, the navigation view shows that item as selected and raises an ItemInvoked event. "
So you just need to handle the NavigationView.ItemInvoked Event and check the NavigationViewItemInvokedEventArgs.IsSettingsInvoked Property.
Here is the code that you could refer to:
<Grid>
<NavigationView ItemInvoked="NavigationView_ItemInvoked">
<NavigationView.PaneFooter>
</NavigationView.PaneFooter>
</NavigationView>
</Grid>
In code behind:
private void NavigationView_ItemInvoked(NavigationView sender, NavigationViewItemInvokedEventArgs args)
{
if (args.IsSettingsInvoked == true)
{
//do something
}
}
Update
If you want to check if the item is a specific one, you could set a tag property in the Xaml for the navigationview item and then check this property in the ItemInvoked event.
In xaml:
<NavigationViewItem Tag="home" Icon="Home" Content="Home"/>
In code behind:
private void NavigationView_ItemInvoked(NavigationView sender, NavigationViewItemInvokedEventArgs args)
{
var navItemTag = args.InvokedItemContainer.Tag.ToString();
if (navItemTag.Equals("home"))
{
// do something
Debug.WriteLine("test");
}
}