Class instance methods? object methods?

Question

According to Wikipedia:

Class methods are methods that are called on a class (compare this to class instance methods, or object methods).

Could you guys please clarify object methods to me? And Class instance methods are Instance methods if i'm correct?

Answer 1

Yes, Class instance methods = Object methods because Object == Class instance. An object is an instance of a class. From wikipedia:

In object-oriented programming, a class is a construct that is used as a blueprint to create instances of itself – referred to as class instances, class objects, instance objects or simply objects.

Answer 2

In objective C class method is used by just class name, you dont need to create a instance of class to access these methods.. But for object methods you need to create an instance of the class which means creating a object of class.. In objective C +/- identifiers are used for it;

@interface AClass: NSObject

+ (void)classMethod;
- (void)instanceMethod;

@end

[AClass classMethod];

AClass *object = [[AClass alloc] init];
[object instanceMethod];