Error on Serialization - arrays

Question

I'm getting this error when I try to proceed on parsing the JSON. Does anyone know what I gotta do to fix it?
Error 1: Cannot subscript a value of type 'AudiobookJSON' (aka 'Array<Dictionary<String, Any>>') with an index of type 'String'
Error on Print
File Model: Audiobook.swift:
import Foundation
struct Audiobook : Codable {
let id: Int
let descricao: String
let urlImagem: String
init(dictionary: AudiobookJSON) {
self.id = dictionary["id"] as! Int//////ERROR MESSAGE ////////
self.descricao = dictionary["descricao"] as! String/////ERROR MESSAGE
self.urlImagem = dictionary["urlImagem"] as! String////ERROR MESSAGE
}
}
Folder Networking: APIClient.swift:
import Foundation
typealias AudiobookJSON = [[String: Any]]
struct APIClient {
static func getAudiobooksAPI(completion: #escaping ([Audiobook]?) -> Void) {
let url = URL(string: "https://alodjinha.herokuapp.com/categoria")
let session = URLSession.shared
guard let unwrappedURL = url else { print("Error unwrapping URL"); return }
let dataTask = session.dataTask(with: unwrappedURL) { (data, response, error) in
guard let unwrappedDAta = data else { print("Error unwrapping data"); return }
do {
//let json = try JSONSerialization.jsonObject(with: unwrappedDAta, options: .allowFragments) as! [String:Any]
//let posts = json["data"] as? AudiobookJSON
let posts = try JSONDecoder().decode([Audiobook].self, from: unwrappedDAta)
print(posts)
completion(posts)
} catch {
print("Could not get API data. \(error), \(error.localizedDescription)")
}
}
dataTask.resume()
}
}

Answer 1

As I can see that AudiobookJSON is an array of key-value pairs that's why you are getting error: So you have to use codable like that:
First: you have to make Codable type struct like that(your codable struct variable names should be same as you are getting in response):
struct Audiobook: Codable {
let id: Int?
let descricao: String?
let urlImagem: String?
}
Second: when you get the response then parse directly using codale like that:
guard let unwrappedDAta = data else { print("Error unwrapping data"); return }
do {
let posts = try JSONDecoder().decode([Audiobook].self, from: unwrappedDAta)
print(posts)
completion(posts)
} catch let message {
print("JSON serialization error:" + "\(message)")
}
You can directly use the response like:
for audio in posts {
print("audio.id")
print("audio.descricao")
print("audio.urlImagem")
}