swiftUI-navigation/NavigationExemple/ContentView.swift

//
//  ContentView.swift
//  NavigationExemple
//
//  Created by Arthur Dambrine on 02/04/2021.
//

import SwiftUI

class User: ObservableObject {
    @Published var score = 0
}

struct ChangeView: View {
    @EnvironmentObject var user: User
    
    var body: some View {
        VStack{
            Text("Score : \(user.score)")
            Button("Increase"){
                self.user.score += 1
            }
        }
    }
}


struct ContentView: View {
    @ObservedObject var user = User()
    
    var body: some View {
        NavigationView{
            
            VStack(alignment: /*@START_MENU_TOKEN@*/.center/*@END_MENU_TOKEN@*/, spacing: 20){
                Text("Score: \(user.score)")
                
                NavigationLink(destination: ChangeView()){
                    Text("Show detail view")
                }
              
               
            }.navigationTitle("Menu principal")
        }
        // Important à ajouter
        .environmentObject(user)
        
    }
}

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