Push View programmatically in callback, SwiftUI

Question

It seems to me that Apple is encouraging us to give up using UIViewController in SwiftUI, but without using view controlelrs, I feel a little bit powerless. Wha

Answer 1

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 Xcode this 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: UserData

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