Re: [Pyobjc-dev] Controller Layer

[b.bum <bb...@ma...>]

On Dec 1, 2003, at 4:48 PM, Carlos Phillips wrote:
>> Try adding...
>>
>>     def automaticallyNotifiesObserversForKey_(self, aKey):
>>         return NO
>>
>> ... to your class and see if that fixes the problem.  Also, make sure 
>> you are running pyobjc based on the latest source from CVS -- there 
>> have been many updates that are 10.3 specific.
>>
>> Finally, we should continue this on pyobjc-dev.  I'm really busy @ 
>> Apple and will likely not have time to answer you in the coming days 
>> -- but the folks on pyobjc-dev will answer and they are really 
>> friendly/knowledgeable.
>
> Overloading the method did in fact fix the problem. I thought this 
> might be useful to someone else.

This appears to be because of the method swizzling that occurs because 
of key-value observing [KVO].   It causes an infinite loop in the 
bridge.

You can still use KVO, though.  You just need to call...

- (void)willChangeValueForKey:(NSString *)key;
- (void)didChangeValueForKey:(NSString *)key;

... or ...

- (void)willChange:(NSKeyValueChange)change valuesAtIndexes:(NSIndexSet 
*)indexes forKey:(NSString *)key;
- (void)didChange:(NSKeyValueChange)change valuesAtIndexes:(NSIndexSet 
*)indexes forKey:(NSString *)key;

... before/after the value is changed.

b.bum