Is there any well-documented example code or article about Keychain programming for iOS?

I've found only this wrapper for the Keychain Services API: http://log.scifihifi.com/post/55837387/simple-iphone-keychain-code

When you only want to use Keychain, it makes your life easy. But w开发者_StackOverflow中文版hen you want to understand keychain, it's terrible. Not a single useful comment.

Hopefully someone knows a blog post or article that has documented example code?

(the examples from Apple are pretty obfuscated and useless in this regard)

I think this Apple example you will find useful. http://developer.apple.com/library/ios/#samplecode/GenericKeychain/Introduction/Intro.html