Re: Help with NSArrayController, NSTableView and NSOpenPanel

FROM : George Orthwein
DATE : Fri Jun 23 20:47:39 2006

You can achieve what you want by following the MailDemo example... 
instead of Mailboxes and Emails, you have directoryModels and 
directoryContents, so create another NSArrayController to manage the 
directoryContents array (set it up like the Emails controller).
http://cocoadevcentral.com/downloads/MailDemo-000084-end.zip
http://cocoadevcentral.com/articles/000084.php

But now I'm confused as you about your original question. Take the 
MailDemo example... I played around with it and I can't figure out 
why this binding for a table column doesn't work:
Mailboxes->selection->emails.properties.address

When this line in the controller gets the array fine:
NSLog(@"log: %@",[mailBoxController 
valueForKeyPath:@"selection.emails.properties.address"]);

Apparently, "mailboxes.selection.emails" is KVO compliant, but 
"mailboxes.selection.emails.properties" is not.

I don't know enough to explain exactly why. Maybe someone can clear 
this up and we'll both learn something. :)

George