In the facebook\'s documentation: Here: https://developers.facebook.com/docs/ios/getting-started
It\'s written that we could use:
pod \\\'Facebook-iO
Changing the pod link to
pod "Facebook-iOS-SDK"
solved it why do they put \' in documentation is the question now?
EDIT: This answer is now outdated. The correct way to install facebook Pod is as @aramusss described above.