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Project 17, part 4 - Ending the app with allowsHitTesting() - Issue the cards didn't appeared enough

Forums > 100 Days of SwiftUI

Hi everyone,

I am on day 89 (Project 17, part 4 - Ending the app with allowsHitTesting()). When testing on simulator, after removing all cards:

  • If I immediately pressed the button "Start Again", then only few cards appeared (may be 0, 1, 2, or 3 cards ...).
  • But if I waited for some more seconds, then pressed the button "Start Again", it could show enough cards (10 ones as example).

Here is the code of ContentView.swift:

//
//  ContentView.swift
//  Flashzilla
//
//  Created by TIEN on 23/02/2024.
//

import SwiftUI

extension View{
    func stacked(at position: Int, in total: Int) -> some View{
        let offset = Double(total - position)
        return self.offset( y: offset * 10)
    }
}

struct ContentView: View {
    @Environment(\.accessibilityDifferentiateWithoutColor) var accessibilityDifferentiateWithoutColor
    @Environment(\.scenePhase) var scenePhase
    @State private var cards = Array<Card>(repeating: .example, count: 10)
    @State private var timeRemaining = 100
    @State private var isActive = true

    let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()

    var body: some View {
        ZStack{
            Image(.background)
                .resizable()
                .ignoresSafeArea()
            VStack{
                Text("Time: \(timeRemaining)")
                    .font(.largeTitle)
                    .foregroundStyle(.white)
                    .padding(.horizontal, 20)
                    .padding(.vertical, 5)
                    .background(.black.opacity(0.75))
                    .clipShape(.capsule)
                ZStack{

                        ForEach(0..<cards.count, id:\.self){ index in
                            CardView(card: cards[index]){
                                withAnimation{
                                    removeCard(at: index)
                                }

                            }
                            .stacked(at: index, in: cards.count)
                            .allowsHitTesting(index == cards.count - 1)
                        }
                }
                .allowsHitTesting(timeRemaining > 0)
                //For testing
                Text("Card remaining: \(cards.count)")
                if cards.isEmpty {
                    Button("Start Again", action: resetCards)
                        .padding()
                        .background(.white)
                        .foregroundStyle(.black)
                        .clipShape(.capsule)
                        .padding()
                }
            }
            if accessibilityDifferentiateWithoutColor {
                VStack{
                    Spacer()
                    HStack{
                        Image(systemName: "xmark.circle")
                            .padding()
                            .background(.black.opacity(0.7))
                            .clipShape(.circle)
                        Spacer()
                        Image(systemName: "checkmark.circle")
                            .padding()
                            .background(.black.opacity(0.7))
                            .clipShape(.circle)
                    }
                    .foregroundStyle(.white)
                    .font(.largeTitle)
                    .padding()
                }
            }

        }
        .onReceive(timer){time in
            guard isActive else {return}
            if timeRemaining > 0 {
                timeRemaining -= 1
            }
        }
        .onChange(of: scenePhase) { oldPhase, newPhase in
            if newPhase == .active {
                if cards.isEmpty == false{
                    isActive = true
                }
            }else {
                isActive = false
            }
        }
    }
    func removeCard(at index: Int){
        guard index >= 0 else {return}
        cards.remove(at: index)
        if cards.isEmpty {
            isActive = false
        }
    }
    func resetCards(){
        cards.removeAll()
        cards = Array<Card>(repeating: .example2, count: 10)
        timeRemaining = 100
        isActive = true
    }
}

#Preview {
    ContentView()
}

Please help me to solve the problem.

Thank you!

   

I don't think my solution is related to your issue but I noticed in your resetCards() method, you're reinitialising cards the array with .example2 instead of .example when you first loaded ContentView.

  func resetCards(){
        cards.removeAll()
        cards = Array<Card>(repeating: .example2, count: 10)
        timeRemaining = 100
        isActive = true
    }

Could you try changing it to .example instead?

   

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