SwiftUI how to interact with the backend service and fetch the value

 class LoginManager : ObservableObject {

    @Published var isLoggedIn = false

    

    func doLogin(username: String, password: String) {

        //in here, you'll do your network call

        //I've mocked it with a simple async call for now

        DispatchQueue.main.asyncAfter(deadline: .now() + 1) {

            //set this once you get the correct response from your server

            //this triggers isActive on the NavigationLink below

            self.isLoggedIn = true

        }

    }

}

struct ContentView : View {

    @ObservedObject private var loginManager = LoginManager()

    

    @State var username = ""

    @State var password = ""

    

    var body: some View {

        NavigationView {

            Button(action: {

                loginManager.doLogin(username: username, password: password)

            }) {

                //Login fields...

                Text("Log me in")

            }.overlay(

                NavigationLink(destination: LoggedInView(), isActive: $loginManager.isLoggedIn) {

                    EmptyView()

                }

            )

        }

    }

}

struct LoggedInView : View {

    var body: some View {

        Text("Logged in")

    }

}

references

https://stackoverflow.com/questions/66107887/direct-to-new-view-in-swiftui-after-successful-http-request-login