Problem parsing JSON data from server Swift - ios

Question

I'm trying to parse data from the server, but I get this error:
failure(Swift.DecodingError.typeMismatch(Swift.Dictionary<Swift.String, Any>, Swift.DecodingError.Context(codingPath: [], debugDescription: "Expected to decode Dictionary<String, Any> but found an array instead.", underlyingError: nil)))
The parameters should be passed as an array of objects, as well as the response object. I can't figure out what should I change in my code so the response is well structured.
This is what a response looks like:
[
{
'code' : number,
'error' => boolean,
'code_error' => number,
'data_error' => string,
'message' => 'Falta Campo requerido'
}
]
These are the parameters that should be passed:
[
{
'email' => 'required|string|email',
'event_type' => 'required|string',
'watermark' => 'required|string',
'date' => 'required',
'location' => 'required|string',
'segment' => 'required',
'time' => 'required',
'country' => 'required',
'city' => 'required'
}
]
And this is what my code looks like.
Data:
struct MarcaAguaResData: Codable {
let code: Int
let error: Bool
let message: String
}
struct MarcaAguaErrorResponse: Decodable, LocalizedError {
let code: Int
let error: Bool
let message: String
let code_error: Int
let data_error: String
}
Server:
class MarcaAguaService {
func marcaAgua(parameters: [String: Any],
completion: #escaping (Result<MarcaAguaResData, Error>)-> Void) {
let urlString = baseUrl + "events"
guard let url = URL(string: urlString) else {
completion(.failure(NetworkingError.badUrl))
return
}
var request = URLRequest(url: url)
var components = URLComponents()
var queryItems = [URLQueryItem]()
for (key, value) in parameters {
let queryItem = URLQueryItem(name: key, value: String(describing: value))
queryItems.append(queryItem)
}
components.queryItems = queryItems
let queryItemsData = components.query?.data(using: .utf8)
request.httpBody = queryItemsData
request.httpMethod = "POST"
request.setValue("Bearer \(token_login)", forHTTPHeaderField: "Authorization")
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
let session = URLSession.shared
let task = session.dataTask(with: request) { (data, response, error) in
DispatchQueue.main.async {
guard let unwrappedResponse = response as? HTTPURLResponse else {
completion(.failure(NetworkingError.badResponse))
return
}
switch unwrappedResponse.statusCode {
case 200 ..< 300:
print("success")
default:
print("failure")
}
if let unwrappedError = error {
completion(.failure(unwrappedError))
return
}
if let unwrappedData = data {
do{
let json = try JSONSerialization.jsonObject(with: unwrappedData, options: .allowFragments)
print("BBBB")
print(json)
if let successRes = try? JSONDecoder().decode(MarcaAguaResData.self, from: unwrappedData){
completion(.success(successRes))
}else{
let errorResponse = try JSONDecoder().decode(MarcaAguaErrorResponse.self, from: unwrappedData)
print("Error \(errorResponse)")
completion(.failure(errorResponse))
}
}catch{
print("AAA")
completion(.failure(error))
}
}
}
}
task.resume()
}
}

Answer 1

To be [MarcaAguaResData].self which is an array instead of MarcaAguaResData.self which is a dictionary
if let successRes = try? JSONDecoder().decode([MarcaAguaResData].self, from: unwrappedData){
completion(.success(successRes))
}else{
let errorResponse = try JSONDecoder().decode([MarcaAguaErrorResponse].self, from: unwrappedData)
print("Error \(errorResponse)")
completion(.failure(errorResponse))
}
With
completion: #escaping (Result<[MarcaAguaResData], Error>)-> Void)