"_OBJC_CLASS_$_AFJSONRequestSeri

Undefined symbols for architecture arm64:

  "_OBJC_CLASS_$_AFJSONRequestSerializer", referenced from:

      objc-class-ref in RequestTool.o

  "_OBJC_CLASS_$_AFHTTPSessionManager", referenced from:

      objc-class-ref in RequestTool.o

  "_OBJC_METACLASS_$_AFJSONResponseSerializer", referenced from:

      _OBJC_METACLASS_$_JSONResponseSerializerWithData in JSONResponseSerializerWithData.o

  "_OBJC_CLASS_$_AFJSONResponseSerializer", referenced from:

      _OBJC_CLASS_$_JSONResponseSerializerWithData in JSONResponseSerializerWithData.o

ld: symbol(s) not found for architecture arm64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

用CocoaPods导入的库如果报以上错误，可尝试以下步骤：Build Setting->Linking->Other Linker Flags，添加$(inherited)。