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How to manage to build/deploy and debug .NET (8) iOS project with its extension project
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(195.2, 72%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EB%3C/text%3E%3C/svg%3E)
Boleslav
0
Reputation points
I am using Visual Studio (Windows).
My solution includes two projects. (All .NET 8 with ios workload):
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net8.0-ios</TargetFramework>
First project is the iOS host app. (Not maui workload, but ios, jic).
Second project is the iOS Extension project with this:
<IsAppExtension>True</IsAppExtension>
<IsWatchExtension>False</IsWatchExtension>
<PlatformTarget>ARM64</PlatformTarget>
<MtouchDevice>iPhone</MtouchDevice>
It's related in the the host app like this:
<ProjectReference Include="..\ext\ext.csproj">
<IsAppExtension>true</IsAppExtension>
<IsWatchApp>false</IsWatchApp>
</ProjectReference>
The issue I can't make the project deployed and run debugging. After long tries and experiments I finally managed to build it without errors (because the extension project required explicitly setting up its PlatformTarged independently on the host app project).
But now, I still get these errors:
Please select a valid device before running the application
(related to the extension project)
Xamarin.iOS does not support deploying the previous version. Please ensure your solution builds before deploying it.
(related to the host project) 4>Deploy failed ========== Build: 2 succeeded, 0 failed, 2 up-to-date, 0 skipped ========== ========== Build completed at 10:50 PM and took 01:32.718 minutes ========== ========== Deploy: 0 succeeded, 2 failed, 0 skipped ========== ========== Deploy completed at 10:50 PM and took 01:32.719 minutes ==========
When I set
<MtouchDevice>iPhone</MtouchDevice>
for the extension, it started mentioning "Signing error". When I set that explicitly for the extension project it still gives me such error.
Also, as long as those the-new-.net-style way with workloads used, I can't select any CPU/Platform explicitly in the Configuration Manager, as having the only option "Any CPU" for the target project(s).
So, I can't make the projects run debugging (not extension's nor even the host app)!
(jic, everything runs and deploys well when running "dotnet build" command line, except still not able to debug it) Any thoughts?
.NET
.NET MAUI
.NET MAUI
A Microsoft open-source framework for building native device applications spanning mobile, tablet, and desktop.
4,026 questions
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(22.400000000000002, 3%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWZ%3C/text%3E%3C/svg%3E)
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,246 Reputation points Microsoft External Staff2024-02-14T07:33:20.45+00:00 You want to deploy the app to your physical iOS device, right?
Xamarin.iOS does not support deploying the previous version. Please ensure your solution builds before deploying it.
This error usually points to the iOS version and SDK version. What's the iOS version? Ande what's the detailed MAUI version? Could expand the
framworksin your project and check theMicrosoft.iOSversion? -
Boleslav 0 Reputation points
2024-02-14T11:22:12.2966667+00:00 That's not MAUI. That's .NET iOS workload (what actually doesn't matter). As I've mentioned, everything is well with SDK and other versions: the host app is built and launches the debugging (on Windows) well (as well as even current code building (as well as deployment when building on Mac)). The problem occurs when the app Extension project is referenced.
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Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,246 Reputation points Microsoft External Staff
2024-02-14T13:49:38.3066667+00:00 I saw you added the "Xamarin" and "Microsoft Intune iOS"tags for this thread, and you said that it's a .net8 project. How did you add the reference? What the type of your projects?
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Boleslav 0 Reputation points
2024-02-14T15:58:16.8266667+00:00 Yep. As long as this system is quite new and they don't have anything else related to iOS, I had to add MAUI. But, again, that doesn't change anything in terms of the issue. The type of the project is clearly described in its description.
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Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,246 Reputation points Microsoft External Staff
2024-02-15T07:27:39.82+00:00 Do you mean your iOS device is updated to iOS17.3? Could you open your project and expand the
framworkselement then see theMicrosoft.iOSversion?When I set <MtouchDevice>iPhone</MtouchDevice> for the extension, it started mentioning "Signing error".
When you run your app on the physical device, a development provisioning profile is necessary. The "Signing error" means there are something wrong with the profile. (Please refer to Device provisioning for .NET MAUI apps on iOS - .NET MAUI | Microsoft Learn) And you mentioned your project is about Hotspot. please check if you set the Hotspot configuration in the entitlement file correctly and create/select the matching provisioning profile.
Also, I understand you have an iOS extension app, but it's not clear what the extension point (type) is. For example, it may be an action extension, share extension so on. (Please see iOS Extensions in Xamarin.iOS - Xamarin | Microsoft Learn, this doc is about Xamarin, it applies to MAUI)
everything runs and deploys well when running "dotnet build" command line, except still not able to debug it
Would you mind sharing the detailed command? And you are using Visual Studio (Windows), do you pair to Mac and choose Remote iOS device?
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