How to solve “”_OBJC_CLASS_$_FIRApp“, referenced from” with Firebase in Xcode

Question

I can't solve the error ""_OBJC_CLASS_$_FIRApp", referenced from:" in Xcode when I added Firebase (ver.3.12.0).

I found the solution to add "$(inherited)" in Other Linker Flags and I did it, but it didn't work.

How can I solve it?

Update (Podfile)

Update2 The linker error is deleted. But if I import "Firebase" by using #import "Firebase.h" or @import Firebase; or #import <Firebase/Firebase.h> , the error 'Firebase.h' file not found has occurred.

Answer 1

You need to chnage your POD file like this as per Google AdMob suggestted on fire base quick start

target 'BannerExample' do
  pod 'Firebase/Core'
  pod 'Firebase/AdMob'
end

it will Install all dependent SDK and will show pod install log like below :

Analyzing dependencies

Downloading dependencies

Installing Firebase (3.12.0)

Installing FirebaseAnalytics (3.6.0)

Installing FirebaseCore (3.4.7)

Installing FirebaseInstanceID (1.0.8)

Installing Google-Mobile-Ads-SDK (7.17.0)

Installing GoogleInterchangeUtilities (1.2.2)

Installing GoogleSymbolUtilities (1.1.2)

Installing GoogleToolboxForMac (2.1.1)

Generating Pods project

Integrating client project

Reference Link : https://firebase.google.com/docs/admob/ios/quick-start

Edit:

Also do one more thing uncomment use_frameworks! it will resolve your problem.

Hope this will solve your problem!