Way to override the tabbar more menu

Question

I was wondering how I would go about changing the "more" menu on a tabbar on iOS to be a bottom pop up rather than a full page.

Answer 1

Hello,

Welcome to Microsoft Q&A!

If I understand correctly , do you want to show a pop up rather than a full page when clicking on the more button on tabbar ?

If so , you can achieve it with custom renderer in iOS project .

   [assembly: ExportRenderer(typeof(TabbedPage), typeof(MyTabRenderer))]  
   namespace FormsA.iOS  
   {  
       public class MyTabRenderer : TabbedRenderer  
       {  
           public override void ViewDidLoad()  
           {  
               base.ViewDidLoad();  
               this.ViewControllerSelected += MyTabRenderer_ViewControllerSelected;  

           }  

           UIViewController lastViewController;  

           private void MyTabRenderer_ViewControllerSelected(object sender, UITabBarSelectionEventArgs e)  
           {  
               var index = this.ViewControllers.ToList().IndexOf(e.ViewController);  

               if(index == -1)  
               {  
                   //handle stuffs  

                   this.SelectedViewController = (lastViewController!=null)? lastViewController: this.ViewControllers[0];  
               }  

               lastViewController = e.ViewController;  
           }  
       }  
   }  

Update

If you're using shell project ,check the code below

   [assembly: ExportRenderer(typeof(Xaminals.AppShell), typeof(Xaminals.iOS.MyShellRenderer))]  
   namespace Xaminals.iOS  
   {  
       public class MyShellRenderer : ShellRenderer  
       {  
           protected override IShellTabBarAppearanceTracker CreateTabBarAppearanceTracker()  
           {  
               return new TabBarAppearance();  
           }  
       }  

       public class TabBarAppearance : IShellTabBarAppearanceTracker  
       {  
           public void Dispose()  
           {  

           }  

           public void ResetAppearance(UITabBarController controller)  
           {  

           }  

           bool isFirst = true;  
           UIViewController lastViewController;  
           public void SetAppearance(UITabBarController controller, ShellAppearance appearance)  
           {  

               if(isFirst)  
               {  
                   controller.ViewControllerSelected += (sender, e) =>  
                   {  
                       var index = controller.ViewControllers.ToList().IndexOf(e.ViewController);  

                       if (index == -1)  
                       {  
                           //handle stuffs  
                           controller.SelectedViewController = (lastViewController != null) ? lastViewController : controller.ViewControllers[0];  
                       }  
                       else  
                       {  
                           lastViewController = e.ViewController;  
                       }               
                   };  
                   isFirst = false;  
               }           
           }  

           public void UpdateLayout(UITabBarController controller)  
           {  

           }  
       }  
   }  

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