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JSON Parsing with Codable in Swift - Nested JSON Model

#Swift, to supporting decoding and encoding we must adopt the #NSCoding protocol and implement its methods. 

#Apple has introduced a new way to decode and encode the #JSON data using with Codable since Swift 4. 

You need to consume the following API to search and display images. - Flickr

Https:// The API results in search results for a

Documentation on this page to get the image URLS:


Open Test Api -

Model: - 

import Foundation

struct ResponseCodable : Codable {

    let photos : Photos?

    let stat : String?

    enum CodingKeys: String, CodingKey {

        case photos = "photos"

        case stat = "stat"


    init(from decoder: Decoder) throws {

        let values = try decoder.container(keyedBy: CodingKeys.self)

        photos = try values.decodeIfPresent(Photos.self, forKey: .photos)

        stat = try values.decodeIfPresent(String.self, forKey: .stat)



struct Photos : Codable {

    let page : Int?

    let pages : Int?

    let perpage : Int?

    let total : Int?

    let photo : [Photo]?

    enum CodingKeys: String, CodingKey {

        case page = "page"

        case pages = "pages"

        case perpage = "perpage"

        case total = "total"

        case photo = "photo"


    init(from decoder: Decoder) throws {

        let values = try decoder.container(keyedBy: CodingKeys.self)

        page = try values.decodeIfPresent(Int.self, forKey: .page)

        pages = try values.decodeIfPresent(Int.self, forKey: .pages)

        perpage = try values.decodeIfPresent(Int.self, forKey: .perpage)

        total = try values.decodeIfPresent(Int.self, forKey: .total)

        photo = try values.decodeIfPresent([Photo].self, forKey: .photo)



struct Photo : Codable {

    let id : String?

    let owner : String?

    let secret : String?

    let server : String?

    let farm : Int?

    let title : String?

    let ispublic : Int?

    let isfriend : Int?

    let isfamily : Int?

    let is_primary : Int?

    let has_comment : Int?

    enum CodingKeys: String, CodingKey {

        case id = "id"

        case owner = "owner"

        case secret = "secret"

        case server = "server"

        case farm = "farm"

        case title = "title"

        case ispublic = "ispublic"

        case isfriend = "isfriend"

        case isfamily = "isfamily"

        case is_primary = "is_primary"

        case has_comment = "has_comment"


    init(from decoder: Decoder) throws {

        let values = try decoder.container(keyedBy: CodingKeys.self)

        id = try values.decodeIfPresent(String.self, forKey: .id)

        owner = try values.decodeIfPresent(String.self, forKey: .owner)

        secret = try values.decodeIfPresent(String.self, forKey: .secret)

        server = try values.decodeIfPresent(String.self, forKey: .server)

        farm = try values.decodeIfPresent(Int.self, forKey: .farm)

        title = try values.decodeIfPresent(String.self, forKey: .title)

        ispublic = try values.decodeIfPresent(Int.self, forKey: .ispublic)

        isfriend = try values.decodeIfPresent(Int.self, forKey: .isfriend)

        isfamily = try values.decodeIfPresent(Int.self, forKey: .isfamily)

        is_primary = try values.decodeIfPresent(Int.self, forKey: .is_primary)

        has_comment = try values.decodeIfPresent(Int.self, forKey: .has_comment)



Request method:-

        var photoList = [Photo]()

        if let url = URL(string: urlString) {

            if let data = try? Data(contentsOf: url) {

                // we're OK to parse!

                parse(json: data)



func parse(json: Data) {

        let decoder = JSONDecoder()


            let jsonPetitions = try decoder.decode(ResponseCodable.self, from: json)


            let dataInfo =

            photoList = dataInfo!






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