ios - 如何从 POST json 获取数据

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，我需要获取服务器以这种形式返回的用户的用户 key :

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

现在我需要存储这个 api token 。为此，我正在尝试这个功能，但它不起作用 -

@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()
}

请告诉我我犯了什么错误，我该如何改正..

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")
    }
}

要存储您的 api_token，您需要使用 UserDefaults:

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