App crashing on iOS simulator

[SandeepReddyPinniti]

Hi Team,

I have a basic login page, I'm running the app on iOS simualtor and developing the code in VS2022 on windows machine. The App crashes as soon as I focus the mouse on the Email text box. I have registered Unhandled Exception event, but the event is not firing. Will you please guide me in resolving this issue.

C#

Copy
AppDomain.CurrentDomain.UnhandledException += HandleUnhandledException;

private void HandleUnhandledException(object sender, UnhandledExceptionEventArgs e)
{
// Log or handle the exception here
Exception ex = (Exception)e.ExceptionObject;
HandleError(ex, "App.HandleUnhandledException");
}

XAML

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<ContentPage.BindingContext>
<viewModels:LoginViewModel />
</ContentPage.BindingContext>



<Grid.RowDefinitions>





</Grid.RowDefinitions>
<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

Thanks

[ivanpovazan]

@SandeepReddyPinniti
If you are using Xcode 15.3, and with it iOS 17.4 simulator, then you are most probably hitting this issue: dotnet/runtime#98941 that prevents MAUI from officially supporting Xcode 15.3 which is tracked here: #21057

The fix will be released in the next servicing release.
Before then, as a workaround, you could try using an older Xcode version (15.2) or try a workaround listed in the description of the issue dotnet/runtime#98941

[SandeepReddyPinniti]

Thanks for your response. I don't see an option install a specific version of xCode on Mac. Is there a way for it?

[ivanpovazan]

Yes, it is possible and you can have different versions installed at the same time, but it requires a few manual steps.
If you are not that familiar with command-line tooling on your Mac and you find it uncomfortable to do the following steps, I would not recommend doing them - to avoid bringing your system in an unwanted state. Nevertheless, here are the required steps.

To download/install an older version of Xcode (e.g., 15.2) you would have to:

1. Manually download the installer by going to: https://developer.apple.com/download/all/?q=xcode and looking up Xcode 15.2
2. Once it is downloaded, unpack/install it by opening the .xip file
3. Once the process is completed, Xcode.app will appear next to the .xip file
4. Rename the Xcode.app into something like: Xcode_15.2.0.app (this step is required as your system-wide version of Xcode, the current version you are using, has the same name in Applications folder)
5. Move the Xcode_15.2.0.app into your Applications (after this step your applications folder would look something like this:

/Applications/Xcode.app
/Applications/Xcode_15.2.0.app

After the above steps you will have everything set up, the only thing left to do is to select the default version of Xcode command-line tools to be used by your system. To do that, there are couple of additional steps required to switch back-and-forth between installed versions (as described in: https://developer.apple.com/library/archive/technotes/tn2339/_index.html)

1. Check the path of Xcode command-line tools currently used on your system by running xcode-select --print-path in your terminal, it should display something like:

   $ xcode-select --print-path
   /Applications/Xcode.app/Contents/Developer
   

2. Check the version of Xcode command-line tools currently used on your system by running xcodebuild -version in your terminal, it should display something like:

   $ xcodebuild -version
   Xcode 15.3
   Build version 15E5202a
   

3. Change the default version to Xcode_15.2.0.app by running sudo xcode-select -s /Applications/Xcode_15.2.0.app in your terminal
4. Verify that the default version is now indeed 15.2:

   $ xcodebuild -version
   Xcode 15.2
   Build version 15C500b
   

To switch back to the current version simply do sudo xcode-select -s /Applications/Xcode.app and verify with the above steps that the command has succeeded.

Hope it helps.

[phillippschmedt]

Easiest way to install multiple xcodes versions is https://github.com/XcodesOrg/xcodes or with GUI https://github.com/XcodesOrg/XcodesApp