swift JSON登录REST，带有post和get响应示例

这是我第一次使用swift在iOS开发中使用REST。 我找不到任何工作或直接（简单）的例子来做我需要的东西。

我有一个登录后端（ https://myaddress.com/rest/login ），我需要传递2个参数：登录名和密码。 当我传递好值（用户存在于数据库中）时，我得到2个变量：token（string）和firstLogin（bool）。 因此，当我获得这些值时，我知道登录成功，我可以登录到我的应用程序。

所以我要求你们提供一个如何实现这个目标的例子（只是一个简单的函数）。 如果我得到工作代码示例，我将知道如何在我的应用程序中将其用于其他rest服务。 我从我找到的教程中尝试了很多解决方案，但是其中任何一个都在为我工作..所以为了不浪费我的时间搜索我希望有经验的人向我展示实现这一目标的方法。

我不确定Alamofire是否如此优秀，我知道swift 4拥有自己的构建网络服务并与json合作。 任何有效的解决方案都会很棒。

另外，附带问题 – 如果我更喜欢使用Alamofire，我是否还需要使用swiftyJSON？ 或者只是为了解析？

Answer 1

如果您不想在项目中导入Alamofire以执行简单任务，则可以使用URLSession 。

这里有一些方法：GET，POST，DELETE METHODS和教程

获取方法

 func makeGetCall() { // Set up the URL request let todoEndpoint: String = "https://jsonplaceholder.typicode.com/todos/1" guard let url = URL(string: todoEndpoint) else { print("Error: cannot create URL") return } let urlRequest = URLRequest(url: url) // set up the session let config = URLSessionConfiguration.default let session = URLSession(configuration: config) // make the request let task = session.dataTask(with: urlRequest) { (data, response, error) in // check for any errors guard error == nil else { print("error calling GET on /todos/1") print(error!) return } // make sure we got data guard let responseData = data else { print("Error: did not receive data") return } // parse the result as JSON, since that's what the API provides do { guard let todo = try JSONSerialization.jsonObject(with: responseData, options: []) as? [String: Any] else { print("error trying to convert data to JSON") return } // now we have the todo // let's just print it to prove we can access it print("The todo is: " + todo.description) // the todo object is a dictionary // so we just access the title using the "title" key // so check for a title and print it if we have one guard let todoTitle = todo["title"] as? String else { print("Could not get todo title from JSON") return } print("The title is: " + todoTitle) } catch { print("error trying to convert data to JSON") return } } task.resume() } 

后方法

 func makePostCall() { let todosEndpoint: String = "https://jsonplaceholder.typicode.com/todos" guard let todosURL = URL(string: todosEndpoint) else { print("Error: cannot create URL") return } var todosUrlRequest = URLRequest(url: todosURL) todosUrlRequest.httpMethod = "POST" let newTodo: [String: Any] = ["title": "My First todo", "completed": false, "userId": 1] let jsonTodo: Data do { jsonTodo = try JSONSerialization.data(withJSONObject: newTodo, options: []) todosUrlRequest.httpBody = jsonTodo } catch { print("Error: cannot create JSON from todo") return } let session = URLSession.shared let task = session.dataTask(with: todosUrlRequest) { (data, response, error) in guard error == nil else { print("error calling POST on /todos/1") print(error!) return } guard let responseData = data else { print("Error: did not receive data") return } // parse the result as JSON, since that's what the API provides do { guard let receivedTodo = try JSONSerialization.jsonObject(with: responseData, options: []) as? [String: Any] else { print("Could not get JSON from responseData as dictionary") return } print("The todo is: " + receivedTodo.description) guard let todoID = receivedTodo["id"] as? Int else { print("Could not get todoID as int from JSON") return } print("The ID is: \(todoID)") } catch { print("error parsing response from POST on /todos") return } } task.resume() } 

删除方法

 func makeDeleteCall() { let firstTodoEndpoint: String = "https://jsonplaceholder.typicode.com/todos/1" var firstTodoUrlRequest = URLRequest(url: URL(string: firstTodoEndpoint)!) firstTodoUrlRequest.httpMethod = "DELETE" let session = URLSession.shared let task = session.dataTask(with: firstTodoUrlRequest) { (data, response, error) in guard let _ = data else { print("error calling DELETE on /todos/1") return } print("DELETE ok") } task.resume() } 

Answer 2

谢谢@MAhipal Singh的回答。 我将在这里发布我使用的Alamafire示例，所以它都在一个堆栈问题中。 它比我更容易，我之前尝试使用的解决方案不起作用，因为我遇到了关于我忘记证书的问题。

 func loginRest(login:String, password:String, deviceId:String){ let urlStr = restServices.REST_MAIN_URL + restServices.REST_LOGIN let params = ["login":login, "password":password, "deviceId":deviceId] let paramsJson = try! JSONSerialization.data(withJSONObject: params) var headers: HTTPHeaders = ["Content-Type": "application/json"] Alamofire.request(urlStr, method: .post, parameters: params, encoding: JSONEncoding.default, headers: headers).responseJSON { (response) in switch response.result { case .success: print("SUKCES with \(response)") case .failure(let error): print("ERROR with '\(error)") } } 

如果post是正确的，响应是（控制台打印）：

 SUKCES with SUCCESS: { firstLogin = 1; token = "dfkafjkfdsakfadsjfksjkfaadjfkjdfkjfskjfdkafjakfjakfjsafksjdafjy878328hjh"; }