iOS - Firebase error: Use of unresolved identifier FIRApp running supplied code

Question

When trying to configure XCode to work with Firebase 3, using the code in the setup docs gives me an error:

https://firebase.google.com/docs/ios/setup#add_the_sdk

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Answer 1

All the other answers are spot on, but it sounds like you've got that stuff covered. Make sure you're using CocoaPods 1.0 (or above) and have specified use_frameworks! in your Podfile.

If you are upgrading, its worth clearing our your Pods/ directory first and possibly running pod deintegrate to get back to a zero state.