I added a custom view controller class with interface (.h), implementation (.m) files, and UI (.xib) to an existing project.
When I ctrl-click and drag between the nib and the interface, it will not place an outlet or IBAction when I drag, so I can't link a UI element to a property. Also, XCode does not bring up the corresponding interface file when I view the nib in assistant editor mode.
Note: I changed the name of the custom class. I changed the filename and the references to it in the source.