xamarin IOS：警告：应用程序无法安装+启动

Question

I am facing the issue below,hope some one will help me out.

I am Using visual studio 2019 to run the xamarin IOS project and paired to MAC succesfully, but the simulator has failed to launch the app and throws the exception below

System.Exception: Failed to launch the simulator: Could not find file "/Users/user/Library/Caches/Xamarin/mtbs/builds/TigrinyaDictionary.iOS/f5727f6bbdd6a791c1a56d7c269a65ff/bin/iPhoneSimulator/Debug/TigrinyaDictionary.iOS.app/TigrinyaDictionary.iOS" at Xamarin.Simulator.Core.Protocol.SimulatorClient.d__26.MoveNext() in E:\\A_work\\1703\\s\\Xamarin.Simulator.Core\\Protocol\\SimulatorClient.cs:line 293 --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Xamarin.Simulator.Windows.App.d__19.MoveNext() in E:\\A_work\\1703\\s\\Xamarin.Simulator.Windows\\App.xaml.cs:line 340 ErrorCode: 1008

Answer 1

It sounds like your build wasn't completed successfully (errors) and the produced App bundle is incorrect.

1. I would check the build logs to see if there are any errors (for issue like this please always give your full verbose build logs).
2. I would check the App bundle on the Mac: /Users/user/Library/Caches/Xamarin/mtbs/builds/TigrinyaDictionary.iOS . Check for completeness.
   You should be able to trace back in the build log where and why that wasn't generated (built).
3. I would install the latest bits of Visual Studio and the Xamarin Support, clean your project, rebuild and re-deploy.

If none of that works, you can report a problem directly in the IDE and that will open a feedback ticket with the Xamarin team.
Please add your full build logs (critical for an issue like this), ideally test project to reproduce and all product version information.