Class Introspection in iOS

·         Determine whether an objective-C object is an instance of a class

        [obj isMemberOfClass:someClass];

·         Determine whether an objective-C object is an instance of a class or its descendants

        [obj isKindOfClass:someClass];

·         The version of a class

        [MyString version]

·         Find the class of an Objective-C object

        Class c = [obj1 class]; Class c = [NSString class];

·         Verify 2 Objective-C objects are of the same class

[obj1 class] == [obj2 class]