Re: Binding NSPopUpButton with Option "Inserts Null Placeholder"
Re: Binding NSPopUpButton with Option "Inserts Null Placeholder"
- Subject: Re: Binding NSPopUpButton with Option "Inserts Null Placeholder"
- From: email@hidden
- Date: Mon, 29 May 2006 21:51:47 +0200
Hello,
No one who could help me? Would be really nice to get some help, I've already
spent a lot of time in my application and now I can't finish because of that
error.
Gian Marc
Zitat von email@hidden:
Hello,
I hope somebody could help me, spent already days for solving the following
problem with a NSPopUpButton and Bindings:
I have an NSPopUpButton and an NSArrayController bound to it. The
NSArrayController gets the data from CoreData. Because I need a 'no region'
menu item in the NSPopUpButton, I selected the option "Inserts Null
Placeholder" for the binding.
All works fine, except for the "no region" menu item, which throws an
exception
"[<NSArrayController 0x1116450> setNilValueForKey]: could not set nil as the
value for the key selectionIndex." when selecting it.
What's wrong?
Here's how I set up the binding for the ArrayController:
I have a NSPopUpButton with the follwing Bindings:
content:
Bind To: regionController (NSArrayController)
Controller Key: arrangedObjects
x Inserts Null Placeholder (because I need a menu item 'no region')
contentValues:
Bind To: regionController (NSArrayController)
Controller Key: arrangedObjects
Model Key Path: name
x Inserts Null Placeholder (because I need a menu item 'no region')
Null Placeholder: no region
selectedIndex:
Bind To: regionController (NSArrayController)
Controller Key: selectionIndex
Thanks for helping!
Marc
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