.Net Maui iOS Native Binding to create a .Net Maui Nuget package

Question

I have a .net Maui Native iOS binding of some iOS framework. I managed to bind successfully. However, I want to create a .Net Maui Class library to consume the iOS native binding. See my project structure below:

<Project Sdk="Microsoft.NET.Sdk">

    <PropertyGroup>
        <TargetFrameworks>net7.0;net7.0-android;net7.0-ios</TargetFrameworks>
        <!-- Uncomment to also build the tizen app. You will need to install tizen by following this: https://github.com/Samsung/Tizen.NET -->
        <!-- <TargetFrameworks>$(TargetFrameworks);net7.0-tizen</TargetFrameworks> -->
        <UseMaui>true</UseMaui>
        <SingleProject>true</SingleProject>
        <ImplicitUsings>enable</ImplicitUsings>

        <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">16.1</SupportedOSPlatformVersion>
        <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">21.0</SupportedOSPlatformVersion>
    </PropertyGroup>

    <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net7.0-ios|AnyCPU'">
      <CreatePackage>false</CreatePackage>
    </PropertyGroup>
    <ItemGroup>
      <ProjectReference Include="..\NativeSdk.Android\NativeSdk.Android.csproj" />

      <ProjectReference Include="..\NativeSdk.iOS\NativeSdk.iOS.csproj" />
    </ItemGroup>
    <ItemGroup Condition=" '$(TargetFramework)' == 'net7.0-ios' ">
  <ProjectReference Include="Path\To\Your\iOSNativeBindingProject.csproj" />
</ItemGroup>
    <ItemGroup>
      <None Remove="Platforms\Android\Models\" />
      <None Remove="Platforms\Android\Aar\" />
      <None Remove="Platforms\Android\Aar\TransaktSDK.aar" />
    </ItemGroup>
    <ItemGroup>
      <Folder Include="Platforms\Android\Models\" />
      <Folder Include="Platforms\Android\Aar\" />
    </ItemGroup>
    <ItemGroup>
       <AndroidAarLibrary Include="Platforms\Android\Aar\TransaktSDK.aar">
          <AndroidSkipResourceProcessing></AndroidSkipResourceProcessing>
      </AndroidAarLibrary>
    </ItemGroup>
    <ItemGroup>
      <Compile Condition=" '$(EnableDefaultCompileItems)' == 'true' " Update="SecureServiceInfo.cs">
        <ExcludeFromCurrentConfiguration>true</ExcludeFromCurrentConfiguration>
      </Compile>
    </ItemGroup>
</Project>

I tried to add to add the other platforms on my Native binding project to avoid compatibility issues. I also added condtions to try to only compile with ios. When I do that all the files in the apiDefinition class break. See below my native iOS project

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
   <TargetFrameworks>net7.0-ios;net7.0;net7.0-android;net7.0-maccatalyst</TargetFrameworks>
    <Nullable>enable</Nullable>
    <ImplicitUsings>true</ImplicitUsings>
    <IsBindingProject>true</IsBindingProject>
  </PropertyGroup>

<!--  <ItemGroup>
    <Compile Remove="StructsAndEnums.cs" />
    <Compile Remove="ApiDefinitions.cs" />
  </ItemGroup>-->
  <ItemGroup>
    <ObjcBindingCoreSource Include="StructsAndEnums.cs" />
  </ItemGroup>
  <ItemGroup>
    <ObjcBindingApiDefinition Include="ApiDefinitions.cs" />
  </ItemGroup>
  <ItemGroup Condition="'$(TargetFramework)' == 'net7.0-ios'">
    <NativeReference Include="..\..\..\..\..\Downloads\nativeSKD_iOS\NativeSDK.xcframework">
      <Kind>Framework</Kind>
      <Frameworks>Foundation</Frameworks>
      <ForceLoad>True</ForceLoad>
    </NativeReference>
  </ItemGroup>
</Project>

I've been stuck on this for days. I just want to create a maui class library including my native iOS binding project

Jessica · Accepted Answer · 2023-08-10 16:28:46Z

0

Why do you want to create a MAUI Class Library? You can reference the dll created by the iOS Binding Library directly in a .NET MAUI App project. Or you can create a nuget from the iOS Binding Library and consume that in a .NET MAUI App project.

answered Aug 10, 2023 at 16:28

Jessica

1

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Community Over a year ago

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zegee29 · Accepted Answer · 2023-08-22 09:54:38Z

unfortunately you have long steps ahead :-/

MAUI same as Xamarin, have lot of configurations that has to be done precisely.

From your example, I cannot see

<ObjcBindingApiDefinition Include="..\NativeSdk.iOS\ApiDefinitions.cs" />

That ^ has to be generated by Sharpie tool. Also Sharpie output is not 100% correct, you have to fix some parts here and there.

Then, your looks almost fine, please add SmartLink:

<NativeReference Include="..\..\..\..\..\Downloads\nativeSKD_iOS\NativeSDK.xcframework">
  <Kind>Framework</Kind>
  <Frameworks>Foundation</Frameworks>
  <ForceLoad>True</ForceLoad>
  <SmartLink>False</SmartLink>
</NativeReference>

Otherwise ForceLoad will be ignored (depends on env conf, but add it to be sure).

And last advise, you should write here an error that you see, otherwise it is truly try-and-fail hints from us.

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