I have the fllowing TabViews in the ContentView. For the onAppear, it works fine. However, I am trying also to reload the tabs and move to the home after the user login from another view.

Following is the code of the ContentView

//  ContentView.swift
//  Matjri
//

//

import SwiftUI

struct ContentView: View {
    @ObservedObject var user = User()

    var body: some View {
        HStack{
            if (user.tokenIsActive) {
                TabView {
                    HomeView()
                        .tabItem {
                            VStack {
                                Image(systemName: "house")
                                Text("Home")
                            }
                    }.tag(0)

                    UserPostsView()
                        .tabItem {
                            VStack {
                                Image(systemName: "person.fill")
                                Text("Me")
                            }
                    }.tag(1)

                    NewPostView()
                        .tabItem {
                            VStack {
                                Image(systemName: "plus")
                                Text("Add")
                            }
                    }.tag(2)
                    SearchView()
                        .tabItem {
                            VStack{
                                Image(systemName: "magnifyingglass")
                                Text("Search")
                            }
                    }.tag(3)
                }
            } else {
                TabView {
                    HomeView()
                        .tabItem {
                            VStack {
                                Image(systemName: "house")
                                Text("Home")
                            }
                    }.tag(0)

                    LoginView()
                        .tabItem {
                            VStack {
                                Image(systemName: "person.fill")
                                Text("Me")
                            }
                    }.tag(1)

                    SearchView()
                        .tabItem{
                            VStack{
                                Image(systemName: "magnifyingglass")
                                Text("Search")
                            }
                    }.tag(2)
                }
            }

        }
        .onAppear() {
            self.checkLoginValidity()
        }
    }

    func checkLoginValidity() {

        let userLogged = UserDefaults.standard.object(forKey: "userIsLogged") as? Bool ?? false

        if (userLogged) {
            let existinLogin = UserDefaults.standard.object(forKey: "loginExpiry") as! Date

            if (existinLogin > Date().addingTimeInterval(86400 * 2)){
                self.user.tokenIsActive = true

            } else {
                self.user.tokenIsActive = false
            }
        } else {
            self.user.tokenIsActive = false
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

When the user login from the LoginView, I set the tokenIsActive to true

struct LoginView: View {

    @ObservedObject var user = User()

    ........

    //Login successful

    self.user.tokenIsActive = true

TabView is not updating. How can I achieve this and I move the user to the homeview after login.

My reference: https://www.hackingwithswift.com/quick-start/swiftui/observable-objects-environment-objects-and-published