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[iOS] NavigationPage InvalidCastException

See original GitHub issue

Description

I deploy an iOS app and it appears to navigate but after a second (likely due to the debugger being slow) I break at Main with an InvalidCastException and no extra details.

Steps to Reproduce

Create a new Maui App from the template. Go to App.Xaml.cs and replace the Shell with MainPage = new NavigationPage(new Page() { BackgroundColor = Colors.Lavender });

Link to public reproduction project repository

It is in the template

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

Tested on iOS 16

Did you find any workaround?

No response

Relevant log output

at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].get_VirtualView()
   at Microsoft.Maui.Handlers.PageHandler.CreatePlatformView()
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].OnCreatePlatformView()
   at Microsoft.Maui.Handlers.ViewHandler.OnCreatePlatformElement()
   at Microsoft.Maui.Handlers.ElementHandler.CreatePlatformElement()
   at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view)
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IView view)
   at Microsoft.Maui.Handlers.ContentViewHandler.SetVirtualView(IView view)
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IElement view)
   at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler)
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value)
   at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)
   at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context)
   at Microsoft.Maui.Platform.ElementExtensions.ToPlatform(IElement view, IMauiContext context)
   at Microsoft.Maui.Controls.Handlers.Compatibility.NavigationRenderer.CreateViewControllerForPage(Page page)
   at Microsoft.Maui.Controls.Handlers.Compatibility.NavigationRenderer.OnPushAsync(Page page, Boolean animated)
   at Microsoft.Maui.Controls.Handlers.Compatibility.NavigationRenderer.<ViewDidLoad>b__50_0(Page p)
   at ObjCRuntime.Runtime.ThrowException(IntPtr gchandle)
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName)
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass)
   at MauiApp1.Program.Main(String[] args) in C:\Repositories\MauiApp1\MauiApp1\Platforms\iOS\Program.cs:line 13

Issue Analytics

State:
Created 9 months ago
Comments:6 (1 by maintainers)

Top GitHub Comments

2reactions

PureWeencommented, Dec 19, 2022

@Michal-MK On this line change Page to ContentPage

0reactions

XamlTestcommented, Jun 13, 2023

Verified this on Visual Studio Enterprise 17.7.0 Preview 1.0. Repro on iOS 16.4 with below Project: 12208.zip

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