I created a new Xcode project, added the \'Firebase\' pod to my pod file and installed it, and added the Google-services.plist file and the rest according to the Firebase docume
EDIT: I found the real problem behind. Firebase had update. User need to update the firebase version via cocopod. After update the cocopod, can use everything normally same as firebase Doc.
==========================================
I have the same problem, but cannot fix it by updating the pod-file.
Finally, I find out a solution.
Google teach us to import only
import Firebase
Just add:
import FirebaseDatabase
and everything will become fine