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Can not install AdMob
The simplest way to import the SDK into an iOS project is to use CocoaPods.
Open your project's Podfile and add this line to your app's target:
pod 'Google-Mobile-Ads-SDK'
[!] `Google-Mobile-Ads-SDK` requires CocoaPods version `>= 1.9.0`, which is not satisfied by your current version, `1.8.3`.
gem sources -l
*** CURRENT SOURCES ***
https://rubygems.org/
Then from the command line run:
sudo gem install cocoapods
pod install --repo-update
