On Apr 28, 2012, at 6:21 PM, Keary Suska wrote:

> Are you updating the model data in a KVO-compliant way?

Bingo!  Thanks for pointing that out, I kept looking at my connections in IB, 
and forgot about the actual code.

So for future reference, my data model is an NSMutableArray.  Instead of adding 
objects by calling addObject, I need to call it as follows:

- (void)addMyObject:(MyObject *)obj 
{
    NSMutableArray *temp = [self mutableArrayValueForKey: @"myArray"];
    [temp addObject: obj];
}

And the same for all the other array changing methods.
 
It all works fine now.


- Koen.
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