receiving error Unknown class PFImageView in Interface Builder file for parse

Question

I attempted to setup pfimage view storyboards in the following manner:

I dragged a UIImageView and then changed its class identity to PFImageView.

Then I dragged

Answer 1

I couldn't get around this problem so I ended up just creating the PFImageView entirely in code. There's a couple examples of this in the Anypic project. I would like to figure out the cause of this problem and how to resolve it, but for now doing it in code allows me to get around it.