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?
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:
@interface MyClass : NSObject + (void)aClassMethod; - (void)anInstanceMethod; @end
They could then be used like so:
[MyClass aClassMethod]; MyClass *object = [[MyClass alloc] init]; [object anInstanceMethod];
Some real world examples of class methods are the convenience methods on many Foundation classes like
+arrayWithArray:. An instance method would be