Undefined symbols for architecture armv7解决

文章转载自：https://blog.youkuaiyun.com/hqc17/article/details/53949449

 "_OBJC_CLASS_$_GCController", referenced from:
      objc-class-ref in libcocos2d iOS.a(CCController-iOS.o)
     (maybe you meant: _OBJC_CLASS_$_GCControllerConnectionEventHandler) 

    使用了AdMob第三方库，编译没问题，在linking时候出错，无法生成测试包。解决办法：

    在build phases下的Link lib里头加入GameController.framework，再次Archive即可。