I am making a Quiz app, but I’ve gotten a bit stuck where I am now. This is the class for the quiz questions:
import Foundation
struct Question: Codable {
let level: Int
let image: String
let answers: [String]
var complete: Bool
let type: String // This can be used as the category if needed
init(level: Int, image: String, answers: [String], complete: Bool, type: String) {
self.level = level
self.image = image
self.answers = answers
self.complete = complete
self.type = type
}
}
class AllQuestions {
static let shared = AllQuestions()
var questions: [Question] = []
private init() {}
func countCompletedQuestions(forType type: String) -> Int {
return questions.filter { $0.type == type && $0.complete }.count
}
// Load questions from UserDefaults when the app starts
func loadQuestions() {
if let savedQuestions = UserDefaults.standard.data(forKey: "savedQuestions"),
let decodedQuestions = try? JSONDecoder().decode([Question].self, from: savedQuestions) {
questions = decodedQuestions
print("Questions loaded successfully.")
} else {
loadDefaultQuestions()
loadFlagQuestions()
loadCarBrandQuestions()
saveQuestions() // Save the default questions initially
}
}
// Update question completion state and save changes to UserDefaults
func updateQuestionCompletion(forQuestion question: Question) {
guard let index = questions.firstIndex(where: { $0.level == question.level && $0.image == question.image && $0.answers == question.answers }) else {
print("Question not found.")
return
}
questions[index].complete = true
saveQuestions()
print("Question updated successfully.")
}
// Save all questions to UserDefaults
func saveQuestions() {
guard !questions.isEmpty else {
print("Questions array is empty. Nothing to save.")
return
}
if let encodedQuestions = try? JSONEncoder().encode(questions) {
UserDefaults.standard.set(encodedQuestions, forKey: "savedQuestions")
print("Questions saved successfully.")
} else {
print("Failed to encode questions.")
}
}
// Example method to mark a question as complete
func markQuestionAsComplete(atIndex index: Int) {
guard index >= 0, index < questions.count else {
return
}
questions[index].complete = true
saveQuestions()
}
func resetQuestions() {
for index in 0..<questions.count {
questions[index].complete = false
}
saveQuestions()
}
func loadDefaultQuestions() {
questions = [
// Level 1
Question(level: 1, image: "FACEBOOK", answers: ["FACEBOOK", "FB"], complete: false, type: "CLASSIC"), // 1
Question(level: 1, image: "SNAPCHAT", answers: ["SNAPCHAT"], complete: false, type: "CLASSIC"), // 2
Question(level: 1, image: "INSTAGRAM", answers: ["INSTAGRAM"], complete: false, type: "CLASSIC"),// 3
Question(level: 1, image: "MESSENGER", answers: ["MESSENGER"], complete: false, type: "CLASSIC"), // 4
Question(level: 1, image: "WHATSAPP", answers: ["WHATSAPP"], complete: false, type: "CLASSIC"), // 5
Question(level: 1, image: "YOUTUBE", answers: ["YOUTUBE"], complete: false, type: "CLASSIC"), // 6
Question(level: 1, image: "VINE", answers: ["VINE"], complete: false, type: "CLASSIC"), // 7
Question(level: 1, image: "SKYPE", answers: ["SKYPE"], complete: false, type: "CLASSIC"), // 8
Question(level: 1, image: "LINKEDIN", answers: ["LINKEDIN"], complete: false, type: "CLASSIC"), // 9
Question(level: 1, image: "TWITCH", answers: ["TWITCH"], complete: false, type: "CLASSIC"), // 10
Question(level: 1, image: "TWITTER", answers: ["TWITTER"], complete: false, type: "CLASSIC"), // 11
Question(level: 1, image: "TIKTOK", answers: ["TIKTOK"], complete: false, type: "CLASSIC"), // 12
Question(level: 1, image: "OUTLOOK", answers: ["OUTLOOK"], complete: false, type: "CLASSIC"), // 13
Question(level: 1, image: "GMAIL", answers: ["GMAIL", "GOOGLE MAIL"], complete: false, type: "CLASSIC"), // 14
Question(level: 1, image: "AMAZON", answers: ["AMAZON"], complete: false, type: "CLASSIC"), // 15
// Level 2
Question(level: 2, image: "PLAYSTATION", answers: ["PLAYSTATION"], complete: false, type: "CLASSIC"), // 1
Question(level: 2, image: "PAYPAL", answers: ["PAYPAL"], complete: false, type: "CLASSIC"), // 2
Question(level: 2, image: "SPOTIFY", answers: ["SPOTIFY"], complete: false, type: "CLASSIC"),// 3
Question(level: 2, image: "NETFLIX", answers: ["NETFLIX"], complete: false, type: "CLASSIC"), // 4
Question(level: 2, image: "PHOTOSHOP", answers: ["PHOTOSHOP"], complete: false, type: "CLASSIC"), // 5
Question(level: 2, image: "BMW", answers: ["BMW"], complete: false, type: "CLASSIC"), // 6
Question(level: 2, image: "QUICKTIME", answers: ["QUICKTIME"], complete: false, type: "CLASSIC"), // 7
Question(level: 2, image: "VLC", answers: ["VLC"], complete: false, type: "CLASSIC"), // 8
Question(level: 2, image: "KIK", answers: ["KIK"], complete: false, type: "CLASSIC"), // 9
Question(level: 2, image: "TUMBLR", answers: ["TUMBLR"], complete: false, type: "CLASSIC"), // 10
Question(level: 2, image: "ANDROID", answers: ["ANDROID"], complete: false, type: "CLASSIC"), // 11
Question(level: 2, image: "APPLE", answers: ["APPLE"], complete: false, type: "CLASSIC"), // 12
Question(level: 2, image: "CHROME", answers: ["CHROME"], complete: false, type: "CLASSIC"), // 13
Question(level: 2, image: "FIREFOX", answers: ["FIREFOX"], complete: false, type: "CLASSIC"), // 14
Question(level: 2, image: "ITUNES", answers: ["ITUNES"], complete: false, type: "CLASSIC"), // 15
]
}
func loadFlagQuestions() {
let flagQuestions = [
// Level 1
Question(level: 1, image: "flag_norway", answers: ["NORWAY", NORGE"], complete: false, type: "FLAGS"),// 1
Question(level: 1, image: "flag_sweden", answers: ["SWEDEN", "SVERIGE"], complete: false, type: "FLAGS"),// 2
Question(level: 1, image: "flag_england", answers: ["ENGLAND", "ENGLAND"], complete: false, type: "FLAGS"),// 3
Question(level: 1, image: "flag_australia", answers: ["AUSTRALIA"], complete: false, type: "FLAGS"),// 30
Question(level: 1, image: "flag_brazil", answers: ["BRAZIL", "BRASIL"], complete: false, type: "FLAGS"),// 4
Question(level: 1, image: "flag_bulgaria", answers: ["BULGARIA", "BULGARIA"], complete: false, type: "FLAGS"),// 5
]
questions.append(contentsOf: flagQuestions)
}
func loadCarBrandQuestions() {
let carBrandQuestions = [
// Level 1
Question(level: 0, image: "car_jaguar", answers: ["JAGUAR"], complete: false, type: "CAR BRANDS"), // 1
Question(level: 0, image: "car_audi", answers: ["AUDI"], complete: false, type: "CAR BRANDS"), // 2
Question(level: 0, image: "car_bmw", answers: ["BMW"], complete: false, type: "CAR BRANDS"), // 3
Question(level: 0, image: "car_ford", answers: ["FORD"], complete: false, type: "CAR BRANDS"), // 4
Question(level: 0, image: "car_ferrari", answers: ["FERRARI"], complete: false, type: "CAR BRANDS"), // 5
]
questions.append(contentsOf: carBrandQuestions)
}
}
And AppDelegate:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
// Load questions once the app starts
AllQuestions.shared.loadQuestions()
return true
}
So all the Questions load fine and all, the complete boolean changed to true when the user has completed the question, but because of the if let in the loadQuestions function, the Questions will only be loaded.
But later I will need to add some more Questions after the app has been launched? And again, because of the if let in the loadQuestions, the Questions will be loaded from the UserDefault each time, so newly added questions will never be loaded.
Any suggestions?
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