Not able to parse the JSON data from F1 url - json

Question

I am trying to access JSON data using the following url http://ergast.com/api/f1/1950/driverstandings.json
Now I am able to access the data with the following function.
In other words I am able to show the data in the console. The issue I am having is parsing the JSON data.
I am using Swifty JSON to parse the data and for some reason I am not able to show the data from the API.
The function below updates the UILabel on the storyboard.
Any help would be appreciated. Below is the entire code for the problem that I am what to solve. I want to add that there is year for the url is coming a UIPickerView on another view.
import UIKit
import Alamofire
import SwiftyJSON
class StandingViewController: UIViewController {
#IBOutlet weak var yearLabel: UILabel!
#IBOutlet weak var firstLabel: UILabel!
#IBOutlet weak var secondLabel: UILabel!
#IBOutlet weak var thirdLabel: UILabel!
#IBOutlet weak var fouthLabel: UILabel!
#IBOutlet weak var fifthLabel: UILabel!
var standing = ""
let standingDataModel = WeatherDataModel()
var currentUrl = ""
let SEASON_URL = "https://ergast.com/api/f1"
//let format = ".json"
override func viewDidLoad() {
super.viewDidLoad()
yearLabel.text = standing
userEnteredNewYear(standing: standing)
// Do any additional setup after loading the view.
}
//MARK: - Networking
/***************************************************************/
//Write the getStandingData method here:
func getStandingData (url: String) {
Alamofire.request(url, method: .get).responseJSON {
response in
if response.result.isSuccess {
print("Success we got the data!")
let standingJSON : JSON = JSON(response.result.value!)
print(standingJSON)
self.updateStandingData(json: standingJSON)
} else {
print("Error \(String(describing: response.result.error))")
self.yearLabel.text = "Connection Issues"
}
}
}
//Mark: JSON Parsing
func updateStandingData(json: JSON) {
if case standingDataModel.season = json["MRData"]["StandingsTable"]["season"].intValue {
standingDataModel.firstDriver = json["DriverStandings"][0]["Driver"]["driverId"].stringValue
updateUIWithStandingData()
} else {
yearLabel.text = "No data available"
}
}
//Mark user entered data.
func userEnteredNewYear(standing: String) {
currentUrl = SEASON_URL + "/" + String(standing) + "/driverstandings.json"
getStandingData(url: currentUrl)
}
func updateUIWithStandingData() {
yearLabel.text = "\(standingDataModel.season)"
firstLabel.text = standingDataModel.firstDriver
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destination.
// Pass the selected object to the new view controller.
}
*/
}

Answer 1

I'd recommend ditching SwiftyJSON. Create real model objects instead and use Swift's built-in Codable:
struct F1Data: Codable {
let mrData: MRData
enum CodingKeys: String, CodingKey {
case mrData = "MRData"
}
}
struct MRData: Codable {
let xmlns: String
let series: String
let url: String
let limit, offset, total: String
let standingsTable: StandingsTable
enum CodingKeys: String, CodingKey {
case xmlns, series, url, limit, offset, total
case standingsTable = "StandingsTable"
}
}
struct StandingsTable: Codable {
let season: String
let standingsLists: [StandingsList]
enum CodingKeys: String, CodingKey {
case season
case standingsLists = "StandingsLists"
}
}
struct StandingsList: Codable {
let season, round: String
let driverStandings: [DriverStanding]
enum CodingKeys: String, CodingKey {
case season, round
case driverStandings = "DriverStandings"
}
}
struct DriverStanding: Codable {
let position, positionText, points, wins: String
let driver: Driver
let constructors: [Constructor]
enum CodingKeys: String, CodingKey {
case position, positionText, points, wins
case driver = "Driver"
case constructors = "Constructors"
}
}
struct Constructor: Codable {
let constructorId: String
let url: String
let name: String
let nationality: String
}
struct Driver: Codable {
let driverId: String
let url: String
let givenName, familyName, dateOfBirth, nationality: String
}
do {
let f1Data = try JSONDecoder().decode(F1Data.self, from: jsonData)
let season = f1Data.mrData.standingsTable.season
let firstDriver = f1Data.mrData.standingsTable.standingsLists[0].driverStandings[0].driver.driverId
} catch {
print(error)
}