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NSIsNilTransformerName exception

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NSIsNilTransformerName exception

Subject: NSIsNilTransformerName exception
From: James Walker <email@hidden>
Date: Tue, 30 Mar 2010 12:11:21 -0700

I'm trying to make a button be disabled if an array controller is being filtered. So in IB I bound the enabled state of the button to the array controller, with controller key "filterPredicate" and value transformer "NSIsNilTransformerName". At run time, an exception is thrown, and the log has a message "Cannot find value transformer with name NSIsNilTransformerName". That really confuses me, because the docs say that NSIsNilTransformerName is one of the built-in value transformers. Clue, please? -- James W. Walker, Innoventive Software LLC <http://www.frameforge3d.com/> _______________________________________________

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