On 7/18/12 1:15 AM, Mike Abdullah wrote:
When I call rearrangeObjects on the array controller, the result gets
rectified. However, even with automaticallyRearrangesObjects = NO, the
array controller rearranges automatically so when I rearrange manually
after setting the filter, I get two KVO change notifications for
arrangedObjects which can be very costly and I'd really like to avoid
that.
Any ideas on how to force NSArrayController to (1) either produce a correct
result automatically or (2) prevent to do any rearranging by itself when a
filterPredicate is set?
Try subclassing NSArrayController and providing a custom implementation of
-arrangeObjects:
Even if you do nothing but set a breakpoint and call super, it’ll give you a
better idea of quite what the rearrangement is doing, and what’s triggering
it.
Thanks for the suggestion. Subclassing and implementing -arrangeObjects: makes
the rearrangement issue go away. As to why I have no idea. How can that be. The
subclass implementation does this:
- (NSArray *)arrangeObjects:(NSArray *)objects
{
return [super arrangeObjects:objects];
}
Setting a breakpoint there shows me that -arrangeObjects is called when I call
-setFilterPredicate: and nothing suspicious happens.
Regards
Markus
--
__________________________________________
Markus Spoettl
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