Question

这是我第一次使用swift在iOS开发中使用REST。我无法找到任何工作或直接（简单）的例子来做我需要的事情。

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。当我传递好的值（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它的例子（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休息服务。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？或者它只是用于解析？

Answer 1

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

这里有一些方法：GET，POST，DELETE METHODS和tutorial

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()
}

POST METHOD

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。我在这里发布了我用过的Alamafire的例子，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了证书的问题。

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)")
        }  
    }

如果帖子合适，则响应是（控制台打印）：

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

带有post和get响应示例的快速JSON登录REST

2 个答案:

这里有一些方法：GET，POST，DELETE METHODS和tutorial