I created an app for iOS 11 with an UIDocumentViewController (From the Xcode 9 template). I registered document types to support .swift files (public.swift-script) and it’s working with open in place and Files app, but in the app’s browser, files with .swift extension are disabled and I can’t select them.
I don’t know if is an iOS 11 bug or me because it’s work if I set document types to work with public.item files.
NOTE: The same thing happens if I allow to pick multiple items, but if I click ‘Select All’, files are selected normally.