Solved: What is the difference between class and instance methods?


What’s the difference between a class method and an instance method?
Are instance methods the accessors (getters and setters) while class methods are pretty much everything else?

Best Answer:

Like most of the other answers have said, instance methods use an instance of a class, whereas a class method can be used with just the class name. In Objective-C they are defined thusly:
They could then be used like so:
Some real world examples of class methods are the convenience methods on many Foundation classes like NSString‘s +stringWithFormat: or NSArray‘s +arrayWithArray:. An instance method would be NSArray‘s -count method.

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