[Pythonmac-SIG] Categories and runtime functions (original) (raw)

Ronald Oussoren ronaldoussoren at mac.com
Wed Nov 24 07:31:52 CET 2004

On 23-nov-04, at 22:34, Dethe Elza wrote:

Can PyObjC be used to extend existing Objective-C classes, either via Categories or classaddMethods() (or in any other way)? What are the requirements to do so? For instance, I believe Categories require the headers to be available.

See the documentation for objc.classAddMethods:

 classAddMethods(targetClass, methodsArray)

 Adds methods in methodsArray to class. The effect is similar to how
 categories work. If class already implements a method as defined in
 methodsArray, the original implementation will be replaced by the
 implementation from methodsArray.

In the unreleased SVN version you can also use objc.Category:

     class NSObject (objc.Category(NSObject)):
             def myMethod(self):
                     pass

objc.Category is syntactic suguar for objc.classAddMethods.

Ronald

--Dethe "And you think you're so clever and classless and free" — John Lennon on prototype-based programming_______________________ Pythonmac-SIG maillist - Pythonmac-SIG at python.org http://mail.python.org/mailman/listinfo/pythonmac-sig

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