For some reason I get this error "Apple Mach-O Linker Error [Linker command failed with exit code 1]" when building the project after I add the code lines to the AppDelegate file. It builds perfectly until then.
Screenshot of the error message
I also tested the Scrumptious app that comes in the FacebookSDK folder as a tester, and it gave me the same error.
Thus, I think it might be some problem with the installation of the sdk into Users/{username}/Documents/FacebookSDK. I literally just download the zip file Facebook provided, unziped, named it to FacebookSDK and pasted this folder in /Documents
Please, any help will be much appreciated!