iOS keychain wrapper API

Nick Lockwood is the author of FXKeychain, a lightweight wrapper to simplify usage of the Apple keychain APIs:

FXKeychain, treats the keychain like a simple dictionary that you can set and get values from. For most purposes you can get by using the defaultKeychain, however it is also possible to create new keychain instances if you wish to namespace your keychain by service, or share values between apps using an accessGroup.

FXKeychain on github