SAMKeychain
Simple Objective-C wrapper for the keychain that works on Mac and iOS
SAMKeychain is a simple wrapper for accessing accounts, getting passwords, setting passwords, and deleting passwords using the system Keychain on Mac OS X and iOS. If your saving to the keychain fails, use the NSError object to handle it. You can invoke [error code] to get the numeric error code. A few values are defined in SAMKeychain.h, and the rest in SecBase.h.