Re: @dynamic and Programmatic Access to Setters

[Jens Alfke]

I've successfully used @dynamic property implementations with CoreData managed-object subclasses. The only limitation I know of is that it only works with object-valued properties, not scalars. But that's not what you're running into.

—Jens

My guess would be that you're not instantiating the object properly. NSManagedObject does some very, very weird stuff behind the scenes, including swizzling in fake superclasses. Accordingly, you have to let the CoreData factory methods instantiate managed objects: just calling alloc+init won't work.

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