任何人都可以帮我解决这个问题，这让我发疯。我查看了我能找到的每一篇有类似问题的帖子，但都没有奏效。
我用 Cocoapods 在我的项目中安装了 AFNetworking 3.0，它安装了，我在我的项目中看到了 AFNetworking pod。只设置构建的架构：是每当我尝试构建时，我都会收到以下错误：
Undefined symbols for architecture x86_64:
"_OBJC_CLASS_$_AFHTTPSessionManager", referenced from:
objc-class-ref in EFServer.o
"_OBJC_CLASS_$_AFJSONRequestSerializer", referenced from:
objc-class-ref in EFServer.o
"_OBJC_CLASS_$_AFJSONResponseSerializer", referenced from:
objc-class-ref in EFServer.o
"_OBJC_CLASS_$_MBProgressHUD", referenced from:
objc-class-ref in EFServer.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)