A sample to decode a JSON structure using Codable

Codable.playground

import Foundation
import UIKit

let json = """
[
{
"title": "Taylor Swift",
"artist": "Taylor Swift",
"url": "https://www.amazon.com/Taylor-Swift/dp/B0014I4KH6",
"image": "https://images-na.ssl-images-amazon.com/images/I/61McsadO1OL.jpg",
"thumbnail_image": "https://i.imgur.com/K3KJ3w4h.jpg"
},
{
"title": "Fearless",
"artist": "Taylor Swift",
"url": "https://www.amazon.com/Fearless-Enhanced-Taylor-Swift/dp/B001EYGOEM",
"image": "https://images-na.ssl-images-amazon.com/images/I/51qmhXWZBxL.jpg",
"thumbnail_image": "https://i.imgur.com/K3KJ3w4h.jpg"
},
{
"title": "Speak Now",
"artist": "Taylor Swift",
"url": "https://www.amazon.com/Speak-Now-Taylor-Swift/dp/B003WTE886",
"image": "https://images-na.ssl-images-amazon.com/images/I/51vlGuX7%2BFL.jpg",
"thumbnail_image": "https://i.imgur.com/K3KJ3w4h.jpg"
},
{
"title": "Red",
"artist": "Taylor Swift",
"url": "https://www.amazon.com/Red-Taylor-Swift/dp/B008XNZMOU",
"image": "https://images-na.ssl-images-amazon.com/images/I/41j7-7yboXL.jpg",
"thumbnail_image": "https://i.imgur.com/K3KJ3w4h.jpg"
},
{
"title": "1989",
"artist": "Taylor Swift",
"url": "https://www.amazon.com/1989-Taylor-Swift/dp/B00MRHANNI",
"image": "https://images-na.ssl-images-amazon.com/images/I/717DWgRftmL._SX522_.jpg",
"thumbnail_image": "https://i.imgur.com/K3KJ3w4h.jpg"
}
]
"""

enum JSONErrors:Error{
    
    case ParseError
}

struct MusicAlbums: Codable{
    
    let albumTitle: String?
    let albumArtist : String?
    let albumURL: String?
    let albumImage : String?
    let albumThumbnailImage : String?
    
    enum CodingKeys: String, CodingKey{
        
        case albumTitle = "title"
        case albumArtist = "artist"
        case albumURL = "url"
        case albumImage = "image"
        case albumThumbnailImage = "thumbnail_image"
    }
    
//    init (from decoder :Decoder) throws {
//        do {
//
//            let container = try decoder.container(keyedBy: CodingKeys.self)
//            albumTitle = try container.decode(String.self, forKey: .albumTitle)
//            albumArtist = try container.decode(String.self, forKey: .albumArtist)
//            albumURL = try container.decode(String.self, forKey: .albumURL)
//            albumImage = try container.decode(String.self, forKey: .albumImage)
//            albumThumbnailImage = try container.decode(String.self, forKey: .albumThumbnailImage)
//        } catch {
//            throw JSONErrors.ParseError
//        }
//
//    }
    init (from decoder :Decoder) throws {
        do {
            
            let container = try decoder.container(keyedBy: CodingKeys.self)
            albumTitle = try container.decodeIfPresent(String.self, forKey: .albumTitle)
            albumArtist = try container.decodeIfPresent(String.self, forKey: .albumArtist)
            albumURL = try container.decodeIfPresent(String.self, forKey: .albumURL)
            albumImage = try container.decodeIfPresent(String.self, forKey: .albumImage)
            albumThumbnailImage = try container.decodeIfPresent(String.self, forKey: .albumThumbnailImage)
        } catch {
            throw JSONErrors.ParseError
        }
        
    }
}

if let jsonData = json.data(using: .utf8)
{

        let jsonObject = try? JSONDecoder().decode([MusicAlbums].self, from: jsonData)
        print(jsonObject)

}