I'm very new with Swift code and I have problems with the challenge: Make the game show only 8 questions, at which point they see a final alert judging their score and can restart the game.

I created a new variable "questionAsked" to count the number of times is asking about the flags. Then I have created a "reset" method along with a variable so that when "questionAsk" reaches 8, the alert to restart the game comes out.

Now I have problems with inserting this method into the code. Could you help me if I'm on track or what do I have to do to make it work?

Thank you very much!

//
//  ContentView.swift
//  GuessTheFlag
//
//  Created by Lucas on 10/11/21.
//

import SwiftUI

struct ContentView: View {
    @State private var showingScore = false
    @State private var scoreTitle = ""
    @State private var score = 0

    @State private var endGame = false
    @State private var questionAsked = 0

    @State private var countries = ["Estonia", "France", "Germany", "Ireland", "Italy", "Nigeria", "Poland", "Russia", "Spain", "UK", "US"].shuffled()
    @State private var correctAnswer = Int.random(in: 0...2)

    var body: some View {
        ZStack {
            RadialGradient(stops: [
                .init(color: Color(red: 0.1, green: 0.2, blue: 0.45), location: 0.3),
                .init(color: Color(red: 0.76, green: 0.15, blue: 0.26), location: 0.3)
            ], center: .top, startRadius: 200, endRadius: 800)
                .ignoresSafeArea()

            VStack {
                Spacer()

                Text("Guess the Flag")
                    .font(.largeTitle.bold())
                    .foregroundColor(.white)

                VStack (spacing: 15){
                    VStack {
                        Text("Tap the flag of")
                            .font(.subheadline.weight(.heavy))
                            .foregroundStyle(.secondary)
                        Text(countries[correctAnswer])
                            .font(.largeTitle.weight(.semibold))
                    }

                    ForEach(0..<3) { number in
                        Button {
                            flagTapped(number)
                        } label: {
                            Image(countries[number])
                                .renderingMode(.original)
                                .clipShape(Capsule())
                                .shadow(radius: 10)
                        }
                    }
                }
                .frame(maxWidth: .infinity)
                .padding(.vertical, 20)
                .background(.ultraThinMaterial)
                .clipShape(RoundedRectangle(cornerRadius: 40))

                Spacer()
                Spacer()

                Text("Question: \(questionAsked)")
                Text("Score: \(score) ")
                    .foregroundColor(.white)
                    .font(.title.bold())
                Spacer()
            }
            .padding()
        }
        .alert(scoreTitle, isPresented: $showingScore) {
            Button("Continue", action: askQuestion)
        } message: {
            Text("Your score is \(score)")
        }
        .alert(scoreTitle, isPresented: $endGame) {
            Button("Continue", action: askQuestion)
        } message: {
            Text("Great! Your final score is \(score)")
        }
    }

    func flagTapped(_ number: Int) {
            if number == correctAnswer {
                scoreTitle = "Correct!"
                score += 1
            } else {
                scoreTitle = "Wrong! That's the flag of \(countries[number])"
            }
            showingScore = true
    }

     func askQuestion() {
            countries.shuffle()
            correctAnswer = Int.random(in: 0...2)
            questionAsked += 1
    }

    func reset()  {
        if questionAsked == 8 {
            endGame = true
        }
    }

}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

The only thing I can think of rename reset to resetme or something like that because reset is a reserved function from Apple

https://developer.apple.com/documentation/coredata/nsmanagedobjectcontext/1506807-reset

Brillant! Works! Thank you very much for the help!