NSNotificationCenter PasteboardChangedNotification Not Firing

Question

I\'m writing a custom keyboard for iOS and I\'d like to detect when the user copies some text. I\'ve read that you can use the NSNotificationCenter along with

Answer 1

You cannot use NSNotificationCenter since the keyboard extension is a different process.

Cocoa includes two types of notification centers: The NSNotificationCenter class manages notifications within a single process. The NSDistributedNotificationCenter class manages notifications across multiple processes on a single computer.

Try this solution: https://stackoverflow.com/a/28436058/649379 which uses CFNotifications. Don't forget to enable App Groups to get access to the shared container.

More code here: https://github.com/cxa/AppExtensionCommunicator & https://github.com/mutualmobile/MMWormhole