I updated Google AdMob SDK to 7.1.0 using Pods.
So in my appDelegate.m, I am trying to add this line
@import GoogleMobileAds;
But I
Xcode Version 7.2.1 (7C1002) Objective C
I had this problem and had to keep on adding the GoogleMobileAds each time to the project to get rid of this. Not sure if this is a bug. First select the GoogleMobileAds.framework then just untick and tick the Target Membership then try build the error goes away. This worked for me. I hope it helps.