NSObject is the root class of
Cocoa, however the
Objective-C language itself does not define any root classes at all its define by
Cocoa, Apple's Framework.This root class of most Objective-C class hierarchies, from which subclasses inherit a basic interface to the runtime system and the ability to behave as Objective-C objects.
This class have all basic property of
Objective'C class object like:
class (name of the class).
superclass (superclass of current class).