ABPersonSetImageData doesn't display image

Question

Hello,

I use ABUnknownPersonViewController to display a contact view.

I try to set an image with:

NSData *dataRef = UIImagePNGRepresentation([UIImage imageNamed:@"contact3.png"]);
ABPersonSetImageData(newPersonViewController.displayedPerson, (CFDataRef)dataRef, nil);

It doesn't work and I don't know why. Any ideas?