Test JSON

PhotoManager.swift

struct BaseModel : 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 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 url_s : String?
    let height_s : Int?
    let width_s : 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 url_s = "url_s"
        case height_s = "height_s"
        case width_s = "width_s"
    }

    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)
        url_s = try values.decodeIfPresent(String.self, forKey: .url_s)
        height_s = try values.decodeIfPresent(Int.self, forKey: .height_s)
        width_s = try values.decodeIfPresent(Int.self, forKey: .width_s)
    }
}

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)
    }
}

func callAPI() {
    if let url = URL(string: "https://api.flickr.com/services/rest/?method=flickr.photos.getRecent&extras=url_s&api_key=aabca25d8cd75f676d3a74a72dcebf21&format=json&nojsoncallback=1") {
       URLSession.shared.dataTask(with: url) { data, response, error in
          if let data = data {
              do {
                 let res = try JSONDecoder().decode(BaseModel.self, from: data)
                  print(res.photos?.photo)
              } catch let error {
                 print(error)
              }
           }
       }.resume()
    }
}


callAPI()

https://github.com/PheonixCoder/FlickClickr/tree/main/FlickrApp