How to send data in extension to Button function - ios

Question

I'm trying to make a quiz application using the API, I can take api data and show on app but I cannot transfer data from extension in viewController to button pressed.right now, when click the button, I want the clicked option to be green or red, how can I do it?
QuizManager
import Foundation
protocol quizManagerDelegate {
func didUpdateQuiz(_ Quizmanager: QuizManager ,quiz: QuizModel)
}
struct QuizManager {
var delegate: quizManagerDelegate?
func performRequest(){
let urlString = "https://opentdb.com/api.php?amount=1&type=multiple"
if let url = URL(string: urlString){
let session = URLSession(configuration: .default)
let task = session.dataTask(with: url) { data, response, error in
if error != nil {
print(error!)
return
}
if let safeData = data{
if let quiz = self.parseJSON(quizdata: safeData){
delegate?.didUpdateQuiz(self, quiz: quiz)
}
}
}
task.resume()
}
}
func handle(data: Data?, response: URLResponse?, error: Error?) -> Void {
}
func parseJSON(quizdata: Data) -> QuizModel? {
let decoder = JSONDecoder()
do{
let decodedData = try decoder.decode(Welcome.self, from: quizdata)
let correct = decodedData.results?[0].correct_answer ?? "error"
let quest = decodedData.results?[0].question ?? "error"
let incorrect = decodedData.results?[0].incorrect_answers ?? ["error"]
let question = QuizModel(correctAnswer: correct, question: quest, falseAnswer: incorrect)
return question
} catch {
print(error)
return nil
}
}
}
QuizData
import Foundation
// MARK: - Welcome
struct Welcome: Codable {
let results: [Result]?
}
// MARK: - Result
struct Result: Codable {
let category: String?
let question, correct_answer: String?
let incorrect_answers: [String]?
}
QuizModel
import Foundation
struct QuizModel {
let correctAnswer : String
let question : String
let falseAnswer : [String]
}
ViewController
import UIKit
import GameKit
class ViewController: UIViewController {
#IBOutlet weak var ChoiceButton4: UIButton!
#IBOutlet weak var ChoiceButton3: UIButton!
#IBOutlet weak var ChoiceButton2: UIButton!
#IBOutlet weak var ChoiceButton1: UIButton!
#IBOutlet weak var QuestionTextView: UITextView!
var quizMangager = QuizManager()
#IBAction func OptionsButtonPressed(_ sender: UIButton) {
}
override func viewDidLoad() {
super.viewDidLoad()
QuestionTextView.layer.cornerRadius = 15
quizMangager.delegate = self
quizMangager.performRequest()
}
}
extension ViewController : quizManagerDelegate{
func didUpdateQuiz(_ Quizmanager: QuizManager, quiz: QuizModel) {
DispatchQueue.main.async { [self] in
self.QuestionTextView.text = quiz.question
var allOptions = []
allOptions.append(quiz.falseAnswer[0])
allOptions.append(quiz.falseAnswer[1])
allOptions.append(quiz.falseAnswer[2])
allOptions.append(quiz.correctAnswer)
let generatedValue = Array(allOptions.shuffled().prefix(4))
print(generatedValue)
print(quiz.correctAnswer)
ChoiceButton1.setTitle(generatedValue[0] as? String, for: .normal)
ChoiceButton2.setTitle(generatedValue[1] as? String, for: .normal)
ChoiceButton3.setTitle(generatedValue[2] as? String, for: .normal)
ChoiceButton4.setTitle(generatedValue[3] as? String, for: .normal)
}
}
}
ViewController
import UIKit
import GameKit
class ViewController: UIViewController {
#IBOutlet weak var ChoiceButton4: UIButton!
#IBOutlet weak var ChoiceButton3: UIButton!
#IBOutlet weak var ChoiceButton2: UIButton!
#IBOutlet weak var ChoiceButton1: UIButton!
#IBOutlet weak var QuestionTextView: UITextView!
var quizMangager = QuizManager()
#IBAction func OptionsButtonPressed(_ sender: UIButton) {
}
override func viewDidLoad() {
super.viewDidLoad()
QuestionTextView.layer.cornerRadius = 15
quizMangager.delegate = self
quizMangager.performRequest()
}
}
extension ViewController : quizManagerDelegate{
func didUpdateQuiz(_ Quizmanager: QuizManager, quiz: QuizModel) {
DispatchQueue.main.async { [self] in
self.QuestionTextView.text = quiz.question
var allOptions = []
allOptions.append(quiz.falseAnswer[0])
allOptions.append(quiz.falseAnswer[1])
allOptions.append(quiz.falseAnswer[2])
allOptions.append(quiz.correctAnswer)
let generatedValue = Array(allOptions.shuffled().prefix(4))
print(generatedValue)
print(quiz.correctAnswer)
ChoiceButton1.setTitle(generatedValue[0] as? String, for: .normal)
ChoiceButton2.setTitle(generatedValue[1] as? String, for: .normal)
ChoiceButton3.setTitle(generatedValue[2] as? String, for: .normal)
ChoiceButton4.setTitle(generatedValue[3] as? String, for: .normal)
}
}
}

Answer 1

You need to "hold onto the quiz data."
So, add a var property to your view controller:
var quizMangager = QuizManager()
// add this
var theQuiz: QuizModel?
then, in your didUpdateQuiz func, set that property:
func didUpdateQuiz(_ Quizmanager: QuizManager, quiz: QuizModel) {
DispatchQueue.main.async { [self] in
// add this
self.theQuiz = quiz
self.QuestionTextView.text = quiz.question
// ... no other changes
Now, connect all your buttons to #IBAction func OptionsButtonPressed and try this:
#IBAction func OptionsButtonPressed(_ sender: UIButton) {
guard let thisQuiz = theQuiz,
let btnTitle = sender.currentTitle
else { return }
if btnTitle == thisQuiz.correctAnswer {
sender.setTitleColor(.systemGreen, for: [])
} else {
sender.setTitleColor(.systemRed, for: [])
}
}