On Jul 29, 2009, at 11:24 AM, Jim Correia wrote:
On Jul 29, 2009, at 1:09 AM, Alexander Heinz wrote:
I've got an NSArrayController subclass with a computed property:
@property (readonly) BOOL canRemoveSelection;
(This basically adds some application-specific checks to the
canRemove: property, so that I can bind a "remove" button in
Interface Builder.)
I want the property to be recomputed every time the
"selectionIndex" or "selectionIndexes" of the array controller
change, so, in my ".m" file, I have:
+ (NSSet*)keyPathsForValuesAffectingCanRemoveSelection
{
return [NSSet setWithObjects:@"selectionIndex",
@"selectionIndexes", nil];
}
[...]
Does anyone see anything immediately wrong here?
My previous post explains why this doesn't work:
http://lists.apple.com/archives/Cocoa-dev/2009/Apr/msg01683.html
Jim
Ah! That explains it perfectly. I already had some ideas for
workarounds, I'll go ahead with those.
Thank you,
Alex
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