Xcode 5.1(5B130a) iOS 7.1 使用CocoaPods pod 'Google-AdMob-Ads-SDK' 使用日志编译失败: Undefined symbols for architecture arm64: "_OBJC_CLASS_$_SKStoreProductViewController", referenced from: objc-class-ref in libGoogleAdMobAds.a(
          > iOS 7.1
>使用CocoaPods
pod 'Google-AdMob-Ads-SDK'
使用日志编译失败:
Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_SKStoreProductViewController", referenced from:
      objc-class-ref in libGoogleAdMobAds.a(GADOpener.o)
  "_SKStoreProductParameterITunesItemIdentifier", referenced from:
      -[GADOpener openInAppStore:fallbackURLString:] in libGoogleAdMobAds.a(GADOpener.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
 仔细检查以确保在xcode链接框架和库中添加了GAD库. 
  
 第二件事是Storekit框架.这些给你错误的类来自storekit.检查以确保它已添加到您的项目中
