How to store int in Core Data with NSTableView binding NSArrayController?

I'm developing a core data a application and I have a attribute of an entity that have type "integer16" (int). I would to set it through a NSTableView, that is bind to core data through a NSArrayController.

I put a NSDateFormatter in the NSTableViewColumn to format the date's column, and it works because NSDateFormatter returns a NSDate. But with NSNumberFormatter doesn't work, because NSNumberFormatter returns a NSNumber, not int or NSInteger (the type set in core data).

Where can I call the method [mynsnumber intValue] to set the int value开发者_运维技巧 in my core data every time user changes the value?

Because you haven't explained why you're trying to store a date as an integer, I'm going to go for the obvious answer: Use a date type to store a date in Core Data.

If it's not a date, then you really need to explain - in detail - exactly what you're trying to accomplish, rather than ask us how to force it to work the way you think it should.

Specific questions in my mind: What exactly does this attribute represent? How do you want to represent it to your user (how should it be formatted - note I'm not asking you what formatter you want to use; what is the goal, not the means you assumed would get you there)?