How to integrate AdMob with iOS?

Dear developers,

I have finished my game but when I am trying to integrate with AdMob then xCode gives me errors after building and running from Unity. The main error is :

ld: library not found for -lGoogleAdMobAds clang: error: linker command failed with exit code 1 (use -v to see invocation)

I have added GoogleMobileAd frameworks and stuff, but it still gives me error that it is missing. Also I tried to change Deployment target from iOS 6 to 8, but still not$$anonymous$$ng. I will add some screenshots, and I hope somebody knows how to help me because I have ran out of ideas. Thanks in advance! :)