Hamster Emporium: [objc explain]: Classes and metaclassesObjective-C is a class-based object system. Each object is an instance of some class; the object's isa pointer points to its class. That class describes the object's data: allocation size and ivar types and layout. The class also describes the object's behavior: the selectors it responds to and instance methods it implements. The class's method list is the set of instance methods, the selectors th
