Re: Why is my NSTableView empty?

FROM : Quincey Morris
DATE : Mon Apr 28 22:03:25 2008

On Apr 28, 2008, at 11:32, Robert Cerny wrote:

> Actually,
> it's not getting called at all. Is it because my method is defined 
> in category? As I wrote already, I'm able to call my methods from 
> gdb so my category is up and running
>
> NSLog(@"%@", [[[ppl arrangedObjects] objectAtIndex:0] lastName]);
>
> as opposed to
> Value (ABPeople.arrangedObjects.lastName)


Because the view uses a binding, it's actually going to call 
'valueForKeyPath:@"lastName"', isn't it? Normally, you'd expect that 
to end up at your 'lastName' method via [NSObject valueForKey:], but 
since it isn't getting to your custom accessor, you know that 
'valueForKey:@"lastName"' is itself returning nil or an empty string.

This suggests to me that ABRecord (the superclass of ABPerson, the 
documentation says) may override valueForKey: with new behavior that 
doesn't call custom accessors or return anything useful. If that's so, 
I can only speculate that it's to prevent you using valueForKey when 
you're "supposed" to use valueForProperty instead.

Does that sound plausible?