TabbedPages

Selecting a Tab at Runtime

Sometimes you may want to programmatically switch between tabs. Keep in mind that this must be done from a ViewModel attached to one of the children of the TabbedPage or the TabbedPage itself.

var result = await navigationService.SelectTabAsync("TabB");

In the event that you have a tab which is nested inside of a NavigationPage you can select the tab:

var result = await navigationService.SelectTabAsync("NavigationPage|TabB");

Navigating to a TabbedPage

Tabbed Navigation in Prism for .NET MAUI has been significantly enhanced. Due to a variety of changes we suggest using a Uri to generate your TabbedPage over using a concrete type like:

<!-- Not Recommended -->
<TabbedPage>
  <view:ViewA />
  <view:ViewB />
</TabbedPage>

The recommended way to do this would be to use either a Uri:

navigationService.NavigateAsync("TabbedPage?createTab=ViewA&createTab=ViewB");

Alternatively you can use the NavigationBuilder to build your TabbedPage on the fly.

navigationService.CreateBuilder()
    .AddTabbedSegment(s => s
        .CreateTab(t => t.AddSegment<ViewAViewModel>())
        .CreateTab(t => t.AddNavigationPage().AddSegment<ViewBViewModel>())
    )
    .NavigateAsync();

This approach offers you a lot of flexibility when creating the same tabbed page over and over throughout your app as well as you can write an extension method once to consolidate this.

public static class MyNavigationExtensions
{
    public static INavigationBuilder AddMyTabbedPage(this INavigationBuilder builder, string? selectedTab = null)
    {
        return builder.AddTabbedSegment(s => 
        {
            s.CreateTab(t => t.AddSegment<ViewAViewModel>())
             .CreateTab(t => t.AddNavigationPage().AddSegment<ViewBViewModel>());
            if (!string.IsNullOrEmpty(selectedTab))
            {
                s.SelectedTab(selectedTab);
            }
        });
    }
}

note

Prism automatically registers the .NET MAUI TabbedPage with the navigation key TabbedPage. You do not need to register your own.