errors when building new project

[nivbp7]

Hi,
I have created a new single view app. I dragged your files into the project and built it.
I get 12 error (see images below).
When running the demo app, there are no issues.
I have removed only GKImagePicker.m/h from my project and there are NO issues.
Any idea why this is?

EDIT:
needed to import UIKit