swift - swift 中的 POST 请求错误

Question

我想成为一种类型的变量来发送到字典服务器但是但是在线上我遇到了问题 let task = session.dataTaskWithRequest(todosUrlRequest) error : Cannot将“NSURL”类型的值转换为预期的参数类型“NSURLRequest”

我有两个问题

1) 这是什么错误？

2)有没有我用过的POST程序是对的？不需要其他任何东西。 ？？ 谢谢你的帮助

func data_request (){

            let url = "http://sample.com/api/Flight/GetTicketInformation"
            guard let todosUrlRequest = NSURL(string: url) else {
                print("Error: cannot create URL")
                return
            }

            let request = NSMutableURLRequest(URL: todosUrlRequest)
            request.HTTPMethod = "POST"
            request.cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringCacheData

            let newTodo = ["Roundtrip": roundTrip,
                           "OneWay": oneWay,
                           "MultiWay": multiWay,
                           "Adult": numberAdults,
                           "Child": numberchild,
                           "Baby": numberinfant,
                           "SourceCityId": cityIDOrigin,
                           "DestinationCityId": cityIDPurpose,
                           "DepartingDate": raftDate,
                           "ReturningDate": bargashtDate ]
            let jsonTodo: NSData
            do {
                jsonTodo = try NSJSONSerialization.dataWithJSONObject(newTodo, options: [])
                request.HTTPBody = jsonTodo

            } catch {
                print("Error: cannot create JSON from todo")
                return
            }
            request.HTTPBody = jsonTodo

            let config = NSURLSessionConfiguration.defaultSessionConfiguration()
            let session = NSURLSession(configuration: config)

            let task = session.dataTaskWithRequest(todosUrlRequest) {
                (data, response, error) in

                guard let responseData = data else {
                    print("Error: did not receive data")
                    return
                }
                guard error == nil else {
                    print("error calling POST on /todos/1")
                    print(error)
                    return
                }

                // parse the result as JSON, since that's what the API provides
                do {
                    guard let receivedTodo = try NSJSONSerialization.JSONObjectWithData(responseData,
                                                                                        options: []) as? [String: AnyObject] else {
                                                                                            print("Could not get JSON from responseData as dictionary")
                                                                                            return
                    }
                    print("The todo is: " + receivedTodo.description)


                } catch  {
                    print("error parsing response from POST on /todos")
                    return
                }
            }
            task.resume()
        }

Answer 1

在 let task = session.dataTaskWithRequest(todosUrlRequest)

行上用

request 代替 todosUrlRequest

第二个问题，不知道。对不起