UIApplication

UIApplication is a singleton object that represents the application.

UIApp

Signature	extern UIApplication* UIApp;
Available in	2.0 –

The method +[UIApplication sharedInstance] is equivalent to using external symbol UIApp. The latter is often used in debugging environments such as Cycript for convenience.

Event recording

Main article: UIApplication/Event recording

UIApplication provides the -_addRecorder: and related methods to record user's events (as GSEvents). Event playback is also supported, so it can be used as a macro system.

References

• Official reference: http://developer.apple.com/IPhone/library/documentation/UIKit/Reference/UIApplication_Class/Reference/Reference.html
• Extra header: http://github.com/kennytm/iphone-private-frameworks/blob/master/UIKit/UIApplication2.h