Errors with dotnet publish - maui

Question

I've used these resources to learn how to publish a MAUI app:
https://learn.microsoft.com/en-us/dotnet/maui/ios/deployment/overview
https://github.com/dotnet/maui/issues/4397
https://github.com/dotnet/sdk/issues/21877
Based on these, I tried different variants to publish, but none of them work:
dotnet publish -f:net6.0-ios -c:Release /p:RuntimeIdentifier=ios-arm64
error : The RuntimeIdentifier 'ios-arm64' is invalid.
dotnet publish -f:net6.0-ios -c:Release /p:RuntimeIdentifier=ios-arm64 --no-restore
error NETSDK1032: The RuntimeIdentifier platform 'ios-arm64' and the
PlatformTarget 'x64' must be compatible.
dotnet build -f:net6.0-ios -c:Release /p:RuntimeIdentifier=ios-arm64 /p:BuildIpa=true
error : The RuntimeIdentifier 'ios-arm64' is invalid.
dotnet build -f:net6.0-ios -c:Release /p:RuntimeIdentifier=ios-arm64 /p:BuildIpa=true --no-restore
error NETSDK1032: The RuntimeIdentifier platform 'ios-arm64' and the
PlatformTarget 'x64' must be compatible.
Update
Environment:
Windows 10 Home - 21H2
VS 2022 Version 17.3.0 Preview 1.1
Update 2
Based on the answers I have now this csproj file:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFrameworks>net6.0-ios</TargetFrameworks>
<OutputType>Exe</OutputType>
<RootNamespace>MonkeyFinder</RootNamespace>
<UseMaui>true</UseMaui>
<SingleProject>true</SingleProject>
<ImplicitUsings>enable</ImplicitUsings>
<!-- Display name -->
<ApplicationTitle>MonkeyFinder</ApplicationTitle>
<!-- App Identifier -->
<ApplicationId>com.testapp.monkeyfinder</ApplicationId>
<ApplicationIdGuid>E46570A0-D087-4FC2-ADFE-58FEAB0BEBB9</ApplicationIdGuid>
<!-- Versions -->
<ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
<ApplicationVersion>1</ApplicationVersion>
<!-- Required for C# Hot Reload -->
<UseInterpreter Condition="'$(Configuration)' == 'Debug'">True</UseInterpreter>
</PropertyGroup>
<PropertyGroup Condition="$(TargetFramework.Contains('-ios')) and '$(Configuration)' == 'Release'">
<RuntimeIdentifier>ios-arm64</RuntimeIdentifier>
<CodesignKey>‌xxx</CodesignKey>
<CodesignProvision>Development Test Provisioning</CodesignProvision>
<ArchiveOnBuild>true</ArchiveOnBuild>
<TcpPort>58181</TcpPort>
<ServerAddress>xxx</ServerAddress>
<ServerUser>xxx</ServerUser>
<ServerPassword>xxx</ServerPassword>
<_DotNetRootRemoteDirectory>/Users/xxx/Library/Caches/Xamarin/XMA/SDKs/dotnet/</_DotNetRootRemoteDirectory>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net6.0-android|AnyCPU'">
<MtouchDebug>True</MtouchDebug>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net6.0-android|AnyCPU'">
<MtouchDebug>True</MtouchDebug>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net6.0-ios|AnyCPU'">
<MtouchDebug>True</MtouchDebug>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net6.0-ios|AnyCPU'">
<MtouchDebug>True</MtouchDebug>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net6.0-maccatalyst|AnyCPU'">
<MtouchDebug>True</MtouchDebug>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net6.0-maccatalyst|AnyCPU'">
<MtouchDebug>True</MtouchDebug>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net6.0-windows10.0.19041|AnyCPU'">
<MtouchDebug>True</MtouchDebug>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net6.0-windows10.0.19041|AnyCPU'">
<MtouchDebug>True</MtouchDebug>
</PropertyGroup>
<ItemGroup>
<!-- App Icon -->
<MauiIcon Include="Resources\appicon.svg" ForegroundFile="Resources\appiconfg.svg" Color="#512BD4" />
<!-- Splash Screen -->
<MauiSplashScreen Include="Resources\appiconfg.svg" Color="#512BD4" />
<!-- Images -->
<MauiImage Include="Resources\Images\*" />
<!-- Custom Fonts -->
<MauiFont Include="Resources\Fonts\*" />
<!-- Raw Assets (also remove the "Resources\Raw" prefix) -->
<MauiAsset Include="Resources\Raw\**" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
</ItemGroup>
And then I tried out these commands based on more collected information since, with the following results:
dotnet publish -f:net6.0-ios -c:Release
A runtime identifier for a device architecture must be specified in order to publish this project. 'iossimulator-x64' is a
simulator architecture.
dotnet build -c:Release /p:BuildIpa=true
Successful, but there is no *.ipa file in bin/Release/net6.0-ios/ios-arm64/publish
I also removed the other PropertyGroup tags, but it made no difference. Expect when removing the first one, then the error is:
error NETSDK1013: The TargetFramework value '' was not recognized. It may be misspelled. If not, then the TargetFrameworkIdentifier and/or TargetFrameworkVersion properties must be specified explicitly.
And also the project doesn't load properly anymore.
Update 3:
When I create a brand new .NET MAUI project from the template it starts compiling with the command
dotnet publish -f:net6.0-ios -c:Release
But even when I copy the xml in the csproj file from the working to the not working project I get the error:
A runtime identifier for a device architecture must be specified in
order to publish this project. 'iossimulator-x64' is a simulator
I guess this indicates that the cause for the error is actually not to be found in the csproj file, but somewhere else?

Answer 1

My solution is to run it on a Mac. Don't run it on your Window machine.
At the moment, you may want to install Visual Studio 2022 Preview for Mac and Open Terminal of your project. Then, run the command with sudo.
Example:
sudo dotnet publish -f:net6.0-ios -c:Release
Note: I set all of my properties in PropertyGroup in the Maui Project
Worked like a champ!

Answer 2

FIX 1
Try including RuntimeIdentifier via a conditional property group in .csproj, and omit it from command line.
From Add code signing ....
.csproj:
<PropertyGroup Condition="$(TargetFramework.Contains('-ios')) and '$(Configuration)' == 'Release'">
<RuntimeIdentifier>ios-arm64</RuntimeIdentifier>
<CodesignKey>iPhone Distribution: John Smith (AY2GDE9QM7)</CodesignKey>
<CodesignProvision>MyMauiApp</CodesignProvision>
<ArchiveOnBuild>true</ArchiveOnBuild>
</PropertyGroup>
Command line:
dotnet publish -f:net6.0-ios -c:Release
FIX 2
For now, when publish for ios, remove other target frameworks from .csproj. NOTE: This shouldn't be needed, because you specify framework via -f, but its worth a try.
Change:
<TargetFrameworks>net6.0-android;net6.0-ios;net6.0-maccatalyst</TargetFrameworks>
<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net6.0-windows10.0.19041.0</TargetFrameworks>
To:
<TargetFrameworks>net6.0-ios</TargetFrameworks>