iOS Share Extension - How to access text in notes app?

Hi,

look at

self.extensionContext.inputItems

Dirk

What is the "share sheet"? I would like to learn about that. And how do I access .extensionContext? I would like to incorporate into my app something like Apple Notes App. Is there a framework that Apple uses for their Notes App, or is that done some other way? With Core Data, perhaps?

I would recommend you start with the Human Interface Guidelines section on Sharing and Actions: https://developer.apple.com/ios/human-interface-guidelines/extensions/sharing-and-actions

There are links at the bottom of the page for more technical details.