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

Swift 5 Using Codable

Alamofire Generic Response

PersonModel.swift (create with SwiftyJsonAccelerator)

import Foundation

class PersonModel: Codable {

  enum CodingKeys: String, CodingKey {
    case age
    case firstname
    case lastname   }

  var age: Int?   var firstname: String?   var lastname: String?

  init (age: Int?, firstname: String?, lastname: String?) {
    self.age = age
    self.firstname = firstname
    self.lastname = lastname   }

  required init(from decoder: Decoder) throws {
    let container = try decoder.container(keyedBy: CodingKeys.self)
    age = try container.decodeIfPresent(Int.self, forKey: .age)
    firstname = try container.decodeIfPresent(String.self, forKey: .firstname)
    lastname = try container.decodeIfPresent(String.self, forKey: .lastname)   }

}

Generic Get Response

func genericGET(urlString: String, completion: @escaping (T?) -> ()) {

Alamofire.request(urlString)
    .responseJSON { response in
        // check for errors
        switch response.result {
        case .success(_):

            do {
                let obj = try JSONDecoder().decode(T.self, from: response.data!)
                completion(obj)
            } catch let jsonErr {
                print("Failed to decode json:", jsonErr)
            }

            break
        case .failure(_):


            completion(nil)

            break
        }
}

}

Call this method

genericGET(urlString: "YOUR_URL") { (persons: [PersonModel]?) in
    print(persons?[0].firstname)
}