ios: Share Extension does not allow me to share .txt or .csv file to my app

Question

I have a share extension in my app. It does share photos from photos app and .pdf files from files app. But it does not work on .txt or .csv files. What do I have to do to allow it?

Answer 1

I found by accident that in order to work with these text files, you have to add to plist of your extension NSExtensionActivationSupportsText than your app will popup in list of available apps to share into