NSPopUpButton + NSArrayController: always adds the 'No Value' item at the bottom of other values.
NSPopUpButton + NSArrayController: always adds the 'No Value' item at the bottom of other values.
- Subject: NSPopUpButton + NSArrayController: always adds the 'No Value' item at the bottom of other values.
- From: "Frederick C. Lee" <email@hidden>
- Date: Wed, 29 Mar 2006 15:29:02 -0800
I have a NSPopUpButton bound to a NSArrayController.
The NSArrayController is dependent on a NSTreeController for content.
Every time I change the content of the NSArrayController, the bound
NSPopUpBottom displays the 'No Value' item that is at the bottom of
the list.
1) If I try to REMOVE this item via action code, I get the following:
*** Assertion failure in -[NSMenu itemAtIndex:], Menus.subproj/
NSMenu.m:713
Invalid parameter not satisfying: (index >= 0) && (index <
(_itemArray ? CFArrayGetCount((CFArrayRef)_itemArray) : 0))
2) When I select an item (higher in the NSPopUpButton list), the 'No
Value' item at the end, is gone.
3) I can place a ' ' - blank for a null placeholder value via the
content of the binding, but that only shows a blank item, the other
items are above this one.
Question: Is there a way to AVOID the extra 'No Value' item of a
bound NSPopUpButton?
That is, there appears to always be a nil value attached to the list
after each re-populating the NSPopUpButton from the bound
NSArrayController.
Is it possible to avoid the extra nil?
Regards,
Ric.
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