06_settings-bundle-app-storage.swift

struct ContentView: View {
    @AppStorage(wrappedValue: false, "enabled_preference") var enabled_preference
    var body: some View {
        NavigationView {
            Text("The toolbar is displayed in conjunction with the switch On/Off in the Settings application - Third Party Application Settings - Sample Application Settings.\n\nNote: The AppStorage value will revert to its initial value after each app transfer after the build, so build carefully.")
                .padding()
                .toolbar {
                    ToolbarItemGroup(placement: .bottomBar) {
                        if enabled_preference {
                            Spacer()
                            Button("Log") {

                            }
                        }
                    }
                }
                .navigationTitle("AppStorage example")
        }
        .navigationBarTitleDisplayMode(.inline)
    }
}