CODEWITHSUNDEEP
objective-coopinstance
Michael C
Michael C

Reputation: 141

Class instance methods? object methods?

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?

Upvotes: 4

Views: 239

Answers (3)

Fatih Donmez
Fatih Donmez

Reputation: 4347

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];

Upvotes: 3

Tudor
Tudor

Reputation: 62469

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.

Upvotes: 3

Paul Lynch
Paul Lynch

Reputation: 19789

Trying to rephrase the above Wikipedia quote more clearly in the context of Objective C:

Class methods are methods belonging to the class, rather than to an instance of a class.

Instance methods are methods of an instance of a class; which is often referred to as an object. Sayng "class instance methods" obviously refers to this, but is confusing.

Upvotes: 2

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