[Pyobjc-dev] Implementing custom setValue_forKey_

[Orestis M. <or...@or...>]

Hello,

I'm trying to subclass an Objective-C class (CALayer) and add my own  
setValue_forKey_ to observe changes to specific KVC attributes.  
However, I get this obscure message:

TypeError: Error when calling the metaclass bases
     Sorry, cannot create IMP for instances of type objc.native_selector

Am I missing something obvious? Here's a minimal repro:

class CrashTest(NSObject):
     def setValue_forKey_(self, v, k):
         pass

I presume that I can use proper KVO to get around this, but I needed  
to subclass anyway, so it seemed like a good solution...

Thanks,
Orestis
--
or...@or...
http://orestis.gr/