Simple Example Appstorage and presenting sheet

AppStorage+SheetExample.swift

//
//  ContentView.swift
//  SimpleAppStorageOnboarding
//
//  Created by Tunde Adegoroye on 05/05/2022.
//

import SwiftUI

struct ContentView: View {
    
    // 1. Setup Appstorage to save value as to whether to show welcome screen or not, this is saved in user defaults on the phone and will be used between opening the app if we should show the welcome screen or not
    
    @AppStorage("showWelcome") private var showWelcome: Bool = true
    
    var body: some View {
        ZStack {
            Color.blue.ignoresSafeArea()
            Text("Home view")
                .bold()
        }
        .foregroundColor(.white)
        // 2. Use Sheet to present the welcome screen with our view ontop
        .sheet(isPresented: $showWelcome) {
            VStack {
                Text("Welcome view")
                    .bold()
                // 3. Give user the ability to dismiss the screen with the button, and also set the value in user defaults to false so we don't see this appear again after another app launch, unless you delete the app and reinstall it
                Button("Tap me to dismiss") {
                    showWelcome = false
                }
            }
            // 4. Give user the alternative to dismiss the screen with the drag down, and also set the value in user defaults to false so we don't see this appear again after another app launch, unless you delete the app and reinstall it
            .onDisappear {
                
                showWelcome = false
            }
        }
    }
}

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