坚持融合worldpay

Question

我用了  'AFNetworking'，'〜＆gt; 3.0'在我的整个应用程序中，现在最后我想整合worldpay付款方式但是当我导入worldpay文件时出现此错误

Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_AFHTTPRequestOperation", referenced from:
      objc-class-ref in libWorldpay.a(Worldpay.o)
      objc-class-ref in libWorldpay.a(ThreeDSController.o)
      objc-class-ref in libWorldpay.a(APMController.o)
  "_OBJC_CLASS_$_AFHTTPRequestOperationManager", referenced from:
      objc-class-ref in libWorldpay.a(WorldpayUtils.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我谷歌并尝试一切，但没有任何效果。请告诉我解决方案。谢谢