[RESOLVED] Re: Curious about copyWithZone message from NSArrayController in "GC required" project

FROM : Luke Evans
DATE : Mon Jan 14 00:37:21 2008

O.K...

So, I just did this and found it wasn't being called any longer.  So, 
I suspect your original intuition was right - there was something 
badly wrong with my code (which thankfully I have now rectified - 
though its frustrating not to be able to nail the original reason now).

One change that may have had a bearing here was that I had 
inadvertently commented out some code to return an 
NSCollectionViewItem in a subclass of NSCollectionView that was 
generating UI for the B objects.  I fixed this yesterday.  It's 
possible that something in NSCollectionView was trying to do its best 
with just the prototype item and the list of B's from the 
NSArrayController.  Anyway, that's pure speculation, and perfectly 
well covered by your comment that "something is seriously wrong with 
your code"!

I'm deleting the spurious copyWithZone now, safe in the knowledge that 
it's just not something that I should need to implement until such 
time as I have a real need for a copy constructor in that class.

Thanks.

-- Lwe


On 13-Jan-08, at 2:54 PM, Bill Bumgarner wrote:

> You mentioned that you had implemented a -copyWithZone: on B?  Can 
> you set a breakpoint on that and see what backtrace barfs up as a 
> result?