In How To Obtain Undocumented API Diffs Between iOS Versions, Ole Begemann, with the help of Nicolas Seriot, shows how to dissect the API differences for each new iOS versions.
In a nutshell, in a terminal
$ git clone https://github.com/nst/iOS-Runtime-Headers.git $ cd iOS-Runtime-Headers $ git difftool 6.0 6.1
To get the APIs diff between iOS 6.0 and iOS 6.1. As pointed in the article Kaleidoscope 2 is the perfect tool for this job:
With this approach, he discovers the undocumented
_UIWebViewController, or even
Another brilliant piece of work, after the Remote View Controllers in iOS 6 saga .