Share between an iOS extension and its containing app with the keychain?

Question

I understand I can share data between my share extension and its containing app by enabling app groups and using NSUserDefaults (see Sharing data between an iOS 8 share extensio

Answer 1

This can be done. It is a combination of creating a framework to do the Keychain access, and turning on "Activate Keychain Sharing" under "Capabilities". This link told me what I needed to know: http://swiftandpainless.com/ios8-share-extension-with-a-shared-keychain/