Copy view controller from one project to another

Question

I am working on project X. I need to add component Y to the project. So I go and create component Y as a separate project, for example Project W. Now I need to copy Project W to Project X as component Y. How do I do this? I don't mind copying one part at a time, for example: copy ViewControllers into the storyboard manually, and then copy the classes manually. Thanks for any help.