On Feb 21, 2011, at 23:58, Motti Shneor wrote: > I can't get this to work --- because I don't know what to write in the > binding of the TableColumn. It seems there is no way to say "Just the entity" > within IB's window. > > I select the table column. > I Bind to: ArrayController > I set the Controller key to: arrangedObjects > and now... I don't know what to write in the "Model Key Path" field. > > I guessed and tried the following values, to no avail. I always get a binding > error: > > 1. Leave the "Model key path" field blank > 2. self > 3. @self > 4. SELF > 5. @SELF > 6. @"" > 7. @
The correct answer is #2: self. What's the "binding error" when you use that? Are you talking about an error in IB or a runtime error? > I believe something is missing in the visual description in IB. when you bind > against the arrangedObjects of the ArrayController, you actually indirectly > specify that the array controller instantiates some Enumerator (Iterator) and > the Model Key Path is applied to that enumerator. But what key-path do you > ask from enumerator to bring back itself?. It is a little funky, because IB shows the binding textually as ArrayController.arrangedObjects.x.y.x, but there's no actual key path like that. (An array property is illegal in the middle of a key path.) Instead, there are two key paths -- ArrayController.arrangedObjects and x.y.z -- and it's the internal implementation of the Table Column "value" binding that bridges between the array represented by the first path and the specific array element needed by the second. _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
