与Alamofire和swiftyjson的多部分职位

Question

我正在使用alamofire作为我的注册表单。我有一个个人资料图片和其他一些字段，如电子邮件，用户名，密码，password_confirmation。 数据必须以原始json形式发布。

        let signupBag = [
            "member_profile": [
                "photo": "URL",
                "user_attributes": [
                    "email": "\(txtEmail.text)",
                    "username": "\(txtName.text)",
                    "password": "\(txtPassword.text)",
                    "password_confirmation": "\(txtConfirmPwd.text)"
                ]
            ]
        ]
        NVActivityIndicatorPresenter.sharedInstance.startAnimating(activityData)
        HelperClass(). doPostMultiPartFormRequest(url: BASE_URL+SIGNUP , param: signupBag, completion: { (dataResponse,swiftJSON,error) in
            guard error == nil else
            {
                NVActivityIndicatorPresenter.sharedInstance.stopAnimating()
                HelperClass.showAlertViewWithTitle(title: "Error", Text: "\(error!.localizedDescription)", controllerToShowOn: self)

                return
            }
            print(swiftJSON!)

            if swiftJSON!["errors"].stringValue != ""
            {
                NVActivityIndicatorPresenter.sharedInstance.stopAnimating()
                HelperClass.showAlertViewWithTitle(title: swiftJSON!["message"].stringValue, Text: swiftJSON!["errors"].stringValue, controllerToShowOn: self)
            }else{

                NVActivityIndicatorPresenter.sharedInstance.stopAnimating()
             self.performSegue(withIdentifier: "showProfile", sender: self)
            }

             NVActivityIndicatorPresenter.sharedInstance.stopAnimating()


        })

Helperclass方法

func doPostMultiPartFormRequest(url:String,  param:[String:Any], completion:@escaping (JSON?,Error?) -> Void)
    {
        print("Method indicator")
        Alamofire.upload(multipartFormData: { (formData) in
            //setting normal params
            for (key, value) in param {
                if value is String
                {
                    formData.append((value as! String).data(using: String.Encoding.utf8)!, withName: key)
                }
            }

            //setting data params
            for (key, value) in param {
                if value is UIImage
                {
                    let imageData = UIImageJPEGRepresentation(value as! UIImage,0.3)!
                    formData.append(imageData, withName: key, fileName: "myImage.png", mimeType: "image/png")

                }
            }

        }, to: url, encodingCompletion:
            {
                (encodingResult) -> Void in
                switch encodingResult {
                case .success(let upload, _, _):
                    upload.responseJSON{ response in
                        guard response.result.error == nil else {
                            print(upload.progress)
                            completion(nil, response.result.error)
                            return
                        }

                        if let value = response.result.value
                        {
                            completion(JSON(value),nil)
                        }
                    }
                case .failure(let error):
                    completion(nil, error)
                    break
                }
        }


        )
    }

但我得到“无法连接到服务器”。我正在使用alamofire和swiftyJson。