Push View programmatically in callback, SwiftUI

I've found the answer. If you want to show another view on callback you should

1. Create state @State var pushActive = false

2. When ViewModel notifies that login is successful set pushActive to true

   func handleSuccessfullLogin() {    self.pushActive = true    print("handleSuccessfullLogin")}

3. Create hidden NavigationLink and bind to that state

   NavigationLink(destination:    ProfileView(viewModel: ProfileViewModelImpl()),   isActive: self.$pushActive) {     EmptyView()}.hidden()

I'm adding some snippets here because I think it simplifies some things and makes reusing navigation links easier:

1. Add View Navigation Extensions

extension View {    func navigatePush(whenTrue toggle: Binding<Bool>) -> some View {        NavigationLink(            destination: self,            isActive: toggle        ) { EmptyView() }    }    func navigatePush<H: Hashable>(when binding: Binding<H>,                                   matches: H) -> some View {        NavigationLink(            destination: self,            tag: matches,            selection: Binding<H?>(binding)        ) { EmptyView() }    }    func navigatePush<H: Hashable>(when binding: Binding<H?>,                                   matches: H) -> some View {        NavigationLink(            destination: self,            tag: matches,            selection: binding        ) { EmptyView() }    }}

Now, you can call on any view (make sure they (or a parent) are in a navigation view)

2. Use at leisure

struct Example: View {    @State var toggle = false    @State var tag = 0    var body: some View {        NavigationView {            VStack(alignment: .center, spacing: 24) {                Text("toggle pushed me")                    .navigatePush(whenTrue: $toggle)                Text("tag pushed me (2)")                    .navigatePush(when: $tag, matches: 2)                Text("tag pushed me (4)")                    .navigatePush(when: $tag, matches: 4)                Button("toggle") {                    self.toggle = true                }                Button("set tag 2") {                    self.tag = 2                }                Button("set tag 4") {                    self.tag = 4                }            }        }    }}

as @Bhodan mentioned you can do it by changing state

Using EnvironmentObject with SwiftUI

1. Add UserData ObservableObject :

class UserData: ObservableObject, Identifiable {    let id = UUID()    @Published var firebase_uid: String = ""    @Published var name: String = ""    @Published var email: String = ""    @Published var loggedIn: Bool = false}

the loggedIn property will be used to monitor when a change in user logs in or out

2. Now add it as an @EnvironmentObject in your SceneDelegate.swift file in Xcodethis just makes it so its accessible everywhere in your app

class SceneDelegate: UIResponder, UIWindowSceneDelegate {    var window: UIWindow?    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).        // Create the SwiftUI view that provides the window contents.        let userData = UserData()        let contentView = ContentView().environmentObject(userData)        // Use a UIHostingController as window root view controller.        if let windowScene = scene as? UIWindowScene {            let window = UIWindow(windowScene: windowScene)            window.rootViewController = UIHostingController(rootView: contentView)            self.window = window            window.makeKeyAndVisible()        }    }

Once you make any change to the loggedIn property any UI that is Binded to it will respond to the true/false value change

the as @Bhodan mentioned just add this to your view and it will respond to that change

struct LoginView: View {@EnvironmentObject var userData: UserDatavar body: some View {NavigationView {VStack {NavigationLink(destination: ProfileView(), isActive: self.$userData.loggedin) {    EmptyView()    }.hidden()   }  } }}