Alamofire4_Swift3_Upload.swift

// Alamofire4 / Swift3 multipart data + prams upload
Alamofire.upload(multipartFormData:{ multipartFormData in
                                    multipartFormData.append(self.imageNSURL, withName: "room[image]")
                                    
                                    let roomText:String = self.roomName.text! as String            
                                    let bodyText = self.roomIntroduction.text
                                    if let data = roomText.data(using: String.Encoding.utf8) {
                                      multipartFormData.append(data, withName: "room[title]")
                                    }
                                    if let data = bodyText?.data(using: String.Encoding.utf8) {
                                      multipartFormData.append(data, withName: "room[body]")
                                    }
                                    
                                   }
                 usingThreshold:UInt64.init(),
                 to:url,
                 method:.post,
                 headers:["Authorization":  keychain["token"]!],
                 encodingCompletion: { encodingResult in
                                      switch encodingResult {
                                        case .success(let upload, _, _):
                                        upload.responseJSON { response in
                                                             debugPrint(response)
                                                            }
                                        case .failure(let encodingError):
                                        print(encodingError)
                                      }
                                     })