How to communicate between iOS App Containing Extension and Extension (not Host App)

Question

TLDR: Is it possible to send realtime messages or notifications between iOS App and it\'s Extension?

I\'m writing an iOS App with an extension

Answer 1

I've been struggling with the same issue and haven't found a clean solution either. Another hacky way to solve this is to simply run a timer in the extension and check the values in the shared container preferences/database periodically and then update if required. Not elegant, but it seems to work.