CODEWITHSUNDEEP
iosswift
John
John

Reputation: 323

Change root ViewController programmatically

I'm trying to change root ViewController of my app programmatically. Once user registers I want different root ViewController. This is my code

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "tabBarVC")

UIApplication.shared.keyWindow?.rootViewController = vc
UIApplication.shared.keyWindow?.makeKeyAndVisible()

self.present(vc, animated: true, completion: nil)

After vc is presented I kill the app, and when I run it again the root ViewControler is the same. What am I doing wrong? I also tried the same code in AppDelegate, but no success.

Upvotes: 1

Views: 5671

Answers (1)

Shehata Gamal
Shehata Gamal

Reputation: 100503

Set this in appDelegate's didFinishLaunchingWithOptions method according to current app settings , also you should use window not keyWindow

if(userExists)
{
   let vc = storyboard.instantiateViewController(withIdentifier: "tabBarVC")

   UIApplication.shared.window.first?.rootViewController = vc

}
else
{
   let vc = storyboard.instantiateViewController(withIdentifier: "loginVC")

   UIApplication.shared.window.first?.rootViewController = vc
}

Don't use present as this will automatically change the root

Also another way to access windows (used when AppDelegate has a value)

let appDelegate = UIApplication.shared.delegate as? AppDelegate
let mainStoryboard = UIStoryboard(name: "Main", bundle: nil)
let homeController =  mainStoryboard.instantiateViewController(withIdentifier: "HomeViewController") as! HomeViewController
appDelegate?.window?.rootViewController = homeController

Upvotes: 1

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