objective c - Cocoa -/+ declarations -


While declaring with cocoa / obj-c - what is the difference between - and +

example For - (zero) doSomething {} or + (zero) doSomething {}

" - "an example method (relative meaning of a specific object), while" + " Means a class method (which is normally usable by a class) -

Example:

For " - (zero) doSomething ": 

  MyCl Ass * obj = [[MyClass alloc] init]; [Obj doSomething];

versus 

  [MyClass doSomething]; " + (zero) doSomething " for

.


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