Question

我正在创建一个登录页面，一旦用户输入用户名密码，数据就会发送到API，如果输入的数据正确，则返回成功。如果结果成功，我需要获取服务器在此表单中返回的用户的用户密钥：

{
    "STATUS_DESC": "Success",
    "STATUS_CODE": 1,
    "email": "keshurai1024@gmail.com",
    "api_token": "Mqbraok1zsdasdasd4j3m"
 }

现在我需要存储这个api令牌。为此，我正在尝试这个功能，但它无法正常工作 -

@IBAction func signInBtnPressed(_ sender: Any) {

    let email : String! = self.usernameField.text
    let password : String! = self.passwordField.text

    var request = URLRequest(url: URL(string: "\(URL_BASE)\(AUTH)\(LOGIN)")!)
    request.httpMethod = "POST"
    let postString = "email=\(email!)&&password=\(password!)"
    request.httpBody = postString.data(using: .utf8)
    let task = URLSession.shared.dataTask(with: request) { data, response, error in
        guard let data = data, error == nil else {                                                 // check for fundamental networking error
            print("error=\(String(describing: error))")
            print("cant run")
            return
        }

        if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 {           // check for http errors
            print("statusCode should be 200, but is \(httpStatus.statusCode)")
            print("response = \(String(describing: response))")
            print("\(email)")
            print("\(password)")


        }
        else {
        let responseString = String(data: data, encoding: .utf8)
        print("responseString = \(String(describing: responseString))")
            print("\(URL_BASE)\(AUTH)\(LOGIN)/?\(postString)")
            Alamofire.request("\(URL_BASE)\(AUTH)\(LOGIN)/?\(postString)" , method : .post).responseJSON { response in
        let result = response.result
        if let dict = result.value as? Dictionary<String,AnyObject>
        {
            print(dict)
        let userTOKEN = dict["api_token"] as! String
            print(userTOKEN)
            }

            }
        }
    }
    task.resume()
}

请告诉我我在做什么错误以及如何纠正它..

Answer 1

尝试将数据解析为json：

 if let jsonData = data {
      do {
           let jsonResult = try JSONSerialization.jsonObject(with: jsonData, options: .allowFragments) as? [String : Any]
           print(jsonResult)
           print(jsonResult?["api_token"])

           //Here we saving aoi_token to UserDefaults:
           UserDefaults.standard.setValue(token, forKey: "api_token")
           print("\(UserDefaults.standard.value(forKey: "api_token")!)")
    } catch {
           print("JSON Processing Failed")
    }
}

要存储你的api_token，你需要使用UserDefaults：

UserDefaults.standard.setValue(token, forKey: "api_token")
print("\(UserDefaults.standard.value(forKey: "api_token")!)")

Answer 2

我不明白您使用URLSession的原因。您可以使用Alamofire作为URLSession的包装。

@IBAction func signInBtnPressed(_ sender: Any) {
    let email : String = self.usernameField.text ?? ""
    let password : String = self.passwordField.text ?? ""

    Alamofire.request("\(URL_BASE)\(AUTH)\(LOGIN)/",
                      method: .post,
                      parameters: ["email": email,
                                  "password", password],
                      encoding: URLEncoding.httpBody).responseJSON { response in 

                      if let dict = response.value as? [String: Any] {
                          let token = dict["api_token"] as! String

                          //store token
                          UserDefaults.standard.set(token, forKey: "token")  
                          UserDefaults.standard.synchronize()
                      }


                      let savedToken = UserDefaults.standard.string(forKey: "token")    
                      print(savedToken)

        }

}

如何从POST json获取数据

2 个答案: