Set UITabBarController as rootViewController - ios

Question

I have a UITabBarController and I want to show this screen and not the login screen if the user session is still active.
My UITabBarController has 3 ViewControllers and the problem is that I don't see the TabBar links in the bottom and I'm unable to navigate.
Without the following code everything works fine. I mean after login I can navigate.
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
FirebaseApp.configure()
if Auth.auth().currentUser != nil {
window = UIWindow(frame: UIScreen.main.bounds)
window?.makeKeyAndVisible()
window?.rootViewController = HomeTabBarController()
}
return true
}
I have also tried the following code to set the rootViewController but it's the same problem.
When I try to set one of the other view controllers as root (one of the children), the Tab Bar doesn't show at all
var rootView: MyRootViewController = MyRootViewController()
if let window = self.window{
window.rootViewController = rootView
}
What am I doing wrong here?

Answer 1

I was facing same issue and I came across your post, the problem with your code is that HomeTabBarController() is creating a whole new TabBarController so to fix it try the following approach I used.
if Auth.auth().currentUser != nil {
print("******************************User Present******************************")
self.window = UIWindow(frame: UIScreen.main.bounds)
let storyboard = UIStoryboard(name: "Main", bundle: nil)
// create view controllers from storyboard
// Interface Builder -> Identitiy Inspector -> Storyboard ID
// Set up the Tab Bar Controller to have two tabs
let tabBarController = storyboard.instantiateViewController(withIdentifier: "HomeTabBarController") as! HomeTabBarController
// Make the Tab Bar Controller the root view controller
window?.rootViewController = tabBarController
window?.makeKeyAndVisible()
}
Edit Make sure to add the Identifier to your TabBarController
// Interface Builder -> Identitiy Inspector -> Storyboard ID

Answer 2

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
//// this code changes the initial point of aap///////
window = UIWindow(frame: UIScreen.main.bounds)
let nav = UINavigationController()
let myview = SettingTabbar()
nav.viewControllers = [myview]
window?.rootViewController = nav
window?.makeKeyAndVisible()
return true
}
And Function SettingTabbar is:
func SettingTabbar()->(UITabBarController)
{
//Setting TabBar
let tabbar = UITabBarController()
//Designing Tabbar Item Images
let table = UITabBarItem(title: nil, image:UIImage(named: "002-list") , tag: 0)
let collection = UITabBarItem(title: nil, image: UIImage(named: "001-collect"), tag: 1)
let insert = UITabBarItem(title: nil, image: UIImage(named: "add"), tag: 2)
//Getting TabBar ViewControllers
let TableView = newViewController()
let CollectionView = PersonCollectionViewController()
let InsertRec = nextViewController()
//Setting ViewControllers on TabBar Items
TableView.tabBarItem = table
CollectionView.tabBarItem = collection
InsertRec.tabBarItem = insert
let controllers = [TableView,CollectionView,InsertRec]
tabbar.viewControllers = controllers
tabbar.viewControllers = controllers.map{UINavigationController(rootViewController: $0)}
//Setting Title
tabbar.navigationItem.title = "Person Record"
return tabbar
}

Answer 3

The problem is this line:
window?.rootViewController = HomeTabBarController()
That is the wrong HomeTabBarController. It is a totally new HomeTabBarController with no children. You need to fetch the HomeTabBarController that’s in the storyboard.

Answer 4

I finally found the solution: As #matt suggested I had to fetch the HomeTabBarController that’s in the storyboard.
window = UIWindow(frame: UIScreen.main.bounds)
let storyboard = UIStoryboard.init(name: "Main", bundle: nil)
// controller identifier sets up in storyboard utilities
// panel (on the right), it called Storyboard ID
let viewController = storyboard.instantiateViewController(withIdentifier: "HomeTabBarController") as! HomeTabBarController
self.window?.rootViewController = viewController
self.window?.makeKeyAndVisible()
window?.makeKeyAndVisible()
window?.rootViewController = viewController