Apple Mach-O linker Error Xcode 6.2

I'm sorry if this question is a duplicate, but I only asked it because I didn't find a solution in other related questions.

I started a new project in Xcode 6.2 and I imported AFNetworking using pods. I also imported SWRevealViewController by dragging the two files (.h and .m) into the project.

Everything looks fine but when I build the project to test it gives me the error below.

Does anyone know how to deal with this?