Cannot reference MAUI-Blazor project from another MAUI-Blazor project on iOS

[Dreamescaper]

Description

I'd like to use shared library with MAUI-Blazor project. Unfortunately, currently it fails with the following error:

error NETSDK1005: Assets file '...\obj\project.assets.json' doesn't have a target for 'net6.0-ios'.

Note that it works perfectly fine with Android or Windows targets.

Repro:
https://github.com/Dreamescaper/maui-3536-repro

Steps to Reproduce

1. Open attached project.
2. Try to build / run MauiApp1 on Remote Simulator.

Version with bug

Preview 10 (current)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 15

Did you find any workaround?

No.

Relevant log output

2>C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.PackageDependencyResolution.targets(267,5): error NETSDK1005: Assets file 'C:\Users\master\source\repos\MauiAppLib\Lib\obj\project.assets.json' doesn't have a target for 'net6.0-ios'. Ensure that restore has run and that you have included 'net6.0-ios' in the TargetFrameworks for your project.
2>Done building project "Lib.csproj" -- FAILED.
========== Build: 1 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

[Eilon]

Hi @Dreamescaper , when you say shared lib, do you mean actual shared source (unlikely?), or do you mean this:

1. Class lib that has Razor + MAUI stuff in it (SDK = Razor, UseMaui=true)
2. MAUI app project that references that class lib

If so, we're tracking that in #3288.

Does it seem the same, or does this seem different?

[Dreamescaper]

The description of the item seems to be correct, but actual results are different.

• That bug mentions that component does not display anymore. In my case I cannot even build it, it fails.

• It reproduces only on iOS.

[Eilon]

OK thanks let's keep this open.

BTW can you upload the repro project as a GitHub repo instead of a ZIP? We're not allowed to open ZIP attachments unfortunately.

[Dreamescaper]

Actually, in my case (MobileBlazorBindings project) I don't even care about .razor files, there are none.
But I need to get access to BlazorWebView type, therefore I need to set SDK to Razor to get it.

Anyway, if that's the same issue - feel free to close it.

[Eilon]

Well, we'll try to fix one and we'll see if it fixes the other 😄

[Dreamescaper]

BTW can you upload the repro project as a GitHub repo instead of a ZIP? We're not allowed to open ZIP attachments unfortunately.

https://github.com/Dreamescaper/maui-3536-repro

[javiercn]

I don't think this is a scenario we plan to support.

Blazor wise, only RCLs are the way to share components and static web assets. If you have a Maui app we don't expect the content to be referenceable from another project in the same way that we don't support scenarios where a web project references another web project.

Only web/maui/wasm references to RCLs are expected to work.

@Eilon feel free to close this issue at your discretion.

[Dreamescaper]

In my particular case I only need to access BlazorWebView type in my lib. If there's any way to get it without setting the SDK to Razor, that would solve my issue.
( Currently it fails due to missing targets if I attempt to add Microsoft.AspNetCore.Components.WebView.Maui package manually to non-Razor project)

[Eilon]

@javiercn I think this is a scenario we must support, but it might not be clear to everyone what it is.

Imagine a MAUI class lib with some MAUI control that internally uses a BlazorWebView and thus needs some Razor files and static assets. It would use the Razor SDK, plus have UseMaui=true.

This scenario is not about referencing a MAUI app as if it is a "regular" class lib.

[kristinx0211]

Verified repro with iPhone 13 pro max IOS 15.2 Simulator and the above project.