使用post和get响应示例的swift JSON登录REST

Question

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是否如此好用,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,我还需要使用swiftyJSON吗？或者只是为了解析？

Answer 1

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

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()
}

POST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()
}