How do I use JSON element with alamofire - json

Question

I am using two textfields to pass login information to the PHP web service using Alamofire in the following way.
#IBAction func LoginButton(_ sender: Any) {
//getting the username and password
let parameters: Parameters=[
"Name":TextFieldUserName.text!,
"Pass":TextFieldPassword.text!
]
Alamofire.request(URL_USER_LOGIN, method: .post, parameters: parameters).responseJSON
{
response in
//printing response
print(response)
The following Json data is received on login.
[{"code":0,"message":"Check Username and Password....","userid":""}]
I want to use either "code" value (0 for false and 1 for true) or "message" value as String to put into an if - else statement for further steps. If Alamofire is not the best way to go about this, can someone please show another way. Thanks in advance for the help.

Answer 1

Do you need to deserialize the response from the server?
The easiest option is parsing response value as NSDictionary
if let JSON = response.result.value as? NSDictionary {
let code = JSON.value(forKey: "code") as? Int
let message = JSON.value(forKey: "message") as? String
}
You can also use the Codable protocol and the JSONDecoder to decode this response into your structure.
For example, declare struct:
struct LoginResponse: Codable {
var code: Int
var message: String
}
and decode response using JSONDecoder
let jsonDecoder = JSONDecoder()
let loginResponse = try? jsonDecoder.decode(LoginResponse.self, from: response.data)