iOS 5 API Reference on iPhone
API Manual For iOS5! Offline! iCloud,Twitter,Accounts,CoreImage,GLKit,CoreImage,GSS etc.
This is a handy reference guide for iOS5 library public API, which includes class reference and its Properties/Class Methods/Instance Methods/Constants, Above that each contain abstract/declaration/discussion.
To be able to quickly and easily find the usage anywhere, This app is well-organized and supports very smart query, All of these are Offline reading, No internet connection required.
Covers the following framework libraries: