struct ContentView: View { var body: some View { print("ContentView.body") return NavigationView { XView() } .environmentObject(Env()) } } struct XView: View { @EnvironmentObject var env: Env var body: some View { NavigationLink(destination: YView(), isActive: $env.isRootNavitaionActive) { Text("To Y") } .navigationBarTitle("X") } } struct YView: View { @EnvironmentObject var env: Env var body: some View { VStack { NavigationLink(destination: ZView()) { Text("To Z") } Button(action: { self.env.isRootNavitaionActive = false }) { Text("Tap this") } } .navigationBarTitle("Y") } } struct ZView: View { @EnvironmentObject var env: Env @State var text: String = "(Before tap)" var body: some View { VStack { Text(text) Button(action: { self.text = "(After tap)" self.env.isRootNavitaionActive = false }) { Text("Tap this") } } .navigationBarTitle("Z") } } final class Env: ObservableObject { @Published var isRootNavitaionActive = false }
