Attempt to present ViewController whose view is not in the windows hierarchy

Question

I meet a strange problem: I made 2 view controllers for wich I can switch the view with code:

var currentViewController:UIViewController=UIApplication.shared         


        

Answer 1

Use like this

let vc = self.view?.window?.rootViewController
func showController()
{
    let ViewControllernew1 = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "viewController2")

    vc.present(ViewControllernew1, animated: true, completion: nil)
}

Maybe the issue is with the currentViewController.