How to implement Share Extension to Xamarin.Forms - iOS project?

Question

I am trying to implement a share extension to my Xamarin.Forms app. And I followed these:

https://docs.microsoft.com/tr-tr/xamarin/ios/platform/extensions

https://docs.microsoft.com/en-us/samples/xamarin/ios-samples/ios8-share/

https://github.com/xamarin/ios-samples/tree/master/ios8/Share

And git repo above works when I run it. But I need to implement this for my xamarin forms project. So I did this steps:

1. I right clicked to my xamarin forms solution. After I select add, new project. And I created "Share Extension (iOS)" project. (I choosed .Net Framework 4.7.2)

2. A Share extension project is created with ShareViewController. I didn't do any change this.

3. I opened info.plist of new created ShareExtension project. And I paid attention bundle identifier. For example my xamarin project's bundle identifier is "com.xamarin.test" and my share extension project's bundle identifier is "com.xamarin.test.share-extension"

4. I selected MinimumOSVersion 10.0 of my main project and my share extension.

5. In my project,NSExtension is following:

   NSExtension NSExtensionAttributes NSExtensionActivationRule NSExtensionActivationSupportsFileWithMaxCount 1 NSExtensionActivationSupportsImageWithMaxCount 1 NSExtensionActivationSupportsMovieWithMaxCount 1 NSExtensionActivationSupportsText NSExtensionActivationSupportsWebURLWithMaxCount 1 NSExtensionMainStoryboard MainInterface NSExtensionPointIdentifier com.apple.share-services

6. After I cleaned whole solution and rebuilt it, I added to reference shared extension project's DLL to my Xamarin iOS project. After that I run the project (on iPhone 7 iOS 12.0 simulator).

When I open photos and I click share for a photo, I expect to see my app on share menu. But it doesn't work. I guess I missed a step but what is this, I don't know.

Answer 1

Your problem is here:

After I cleaned whole solution and rebuilded, I added to reference shared extension project's dll to my xamarin ios project.

In the document, when it says about Container app project requirements :

It must maintain a reference to the Extension project.

You should right click the xamarin ios project --> Add a reference --> Choose the shared extension project . What you are doing is a opposite way.

So remove the wrong reference and add the new reference, clean and rebuild your solution, run again.

Update:

Answer 2

Can Deployment Targets be different?I added Share extension it worked directly. Info.plist also looks correct. Is Deployment Target iOS 12+?

Edit: First answer is another question's answer. Let's think as if it didn't never exist :)

Answer 3

As stated here , you want to make sure all the project references are correct. Another important thing when testing on a device, make sure you do so in release configuration with the linker on, as it is clarified here .

And finally, if you want to use your Xamarin.Forms UI (Xaml pages) in your extension, follow this recently published walkthrough .