On 2 Nov 2011, at 11:40 PM, George Nachman wrote:
> I just moved to XCode 4, from the Mac OS 10.5 SDK to the 10.6 SDK, and
> from Snow Leopard to Lion. A behavior that changed is that entering
> invalid text into an NSTextField with an NSNumberFormatter causes the
> entire field's contents to be erased rather than disallowing the bogus
> character from being added.
Try this: Subclass NSNumberFormatter, and implement
isPartialStringValid:proposedSelectedRange:originalString:originalSelectedRange:errorDescription:
(preferred) or isPartialStringValid:newEditingString:errorDescription:. You
may have to setPartialStringValidationEnabled: YES.
At least, that's my reading of the documentation. I haven't tried it myself.
— F
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