Swift 4 Codable Array's

Question

So I have an API route that returns a JSON array of objects. For example:

[
    {\"firstname\": \"Tom\", \"lastname\": \"Smith\", \"age\": 31},
    {\"firstname\         


        

Answer 1

I managed to serialize data response to codable objects.

As all you may have been familiar with converting json object [String: String] for example. That json object need to be converted to Data by using json.data(using: .utf8)!.

With Alamofire, it is easy to get that data (or at least this kind of data worked for me, already compatible with .utf8 thing), I can just use this already available function

func responseData(queue: DispatchQueue?, completionHandler: @escaping (DataResponse) -> Void) -> Self

Then just use that data as input for the Decoder in the completionHandler

let objek = try JSONDecoder().decode(T.self, from: data)

You can also make this to some generic serialization function, with a little tweak, from the documentation

Generic Response Object Serialization

to this modification

func responseCodable(
    queue: DispatchQueue? = nil,
    completionHandler: @escaping (DataResponse) -> Void)
    -> Self
{
    let responseSerializer = DataResponseSerializer { request, response, data, error in
        guard error == nil else { return .failure(BackendError.network(error: error!)) }

        guard let data = data else {
            return .failure(BackendError.objectSerialization(reason: "data is not valid"))
        }


        do{
            let objek = try JSONDecoder().decode(T.self, from: data!)
            return .success(objek)
        } catch let e {
            return .failure(BackendError.codableSerialization(error: e))
        }

    }

    return response(queue: queue, responseSerializer: responseSerializer, completionHandler: completionHandler)
}

Sample struct

struct Fids: Codable {

   var Status: Status?
   var Airport: Airport?
   var Record: [FidsRecord]
}

Use the function this way

    Alamofire.request("http://whatever.com/zzz").responseCodable { (response: DataResponse) in
        switch response.result{
        case .success(let value):
            print(value.Airport)
        // MARK: do whatever you want
        case .failure(let error):
            print(error)
            self.showToast(message: error.localizedDescription)
        }
    }