Hi all,
This may be a silly question. I need to know where is the +alloc method is defined for any Objective-C class?
If it is a class method in NSObject how it is inherited? Because class methods cant be inherited.
Thanks.
views:
72answers:
2
+5
A:
Yes, it is defined in NSObject (and NSProxy). A quick look in the documentation would have told you that.
because class methods cant be inherited.
Wrong. Where did you read that?
Ole Begemann
2010-10-24 12:30:44
A:
It's a class method of NSObject. NSObject itself does not inherit from anything because it's a root class.
alloc
Returns a new instance of the receiving class.
+ (id)allocReturn Value
A new instance of the receiver.
BoltClock
2010-10-24 12:31:34
-1; objective-c doesn't have static methods. You must be thinking of java.
Graham Lee
2010-10-24 12:52:30
@Graham: Thanks for spotting that, I've corrected it.
BoltClock
2010-10-24 12:56:37
@Graham Lee, Even though we call it class methods in objective c, its quite similar to Java static methods. We just call it by the class name directly without instantiating objects.
charith
2010-10-24 14:54:15
@charith: in Objective-C, `static` has a specific meaning. That meaning is not satisfied by a class method.
Graham Lee
2010-10-24 15:03:08
@Graham, Shall I know what it is? Im new to Objective C. Also I cant imagine how class methods are inherited. Pls explain. Thanks.
charith
2010-10-24 15:06:19
@charith: You don't call methods in Objective-C, you send messages. To send a message you must have an object to send it to. The only difference between a class method and a normal method is that you send the message to an object that happens to represent a class.
JeremyP
2010-10-24 18:08:11