navigation avec passage d'objet et ses valeurs en environnement aux vues filles

NavigationExemple/ContentView.swift

@@ -7,27 +7,42 @@
 
 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 {
-    @State private var isShowingDetailView = false
+    @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: Text("Heads"), isActive: $isShowingDetailView){
-                    EmptyView()
+                NavigationLink(destination: ChangeView()){
+                    Text("Show detail view")
                 }
               
-                Button("Tap to show view"){
-                    // Some custom code here
-                    // ..
-                    self.isShowingDetailView = true
-                }
                
             }.navigationTitle("Menu principal")
         }
+        // Important à ajouter
+        .environmentObject(user)
         
     }
 }