Swift - warning: attempt to present on whose view is not in the window hierarchy

Question

I got this problem when I click back button inside my SecondViewController.

2014-12-24 12:08:58.838 UPASS[5158:71438] Warning: Attempt to present <APPNAME.ThirdViewController: 0x7ae6bcc0> on <APPNAME.SecondViewController: 0x7af72060> whose view is not in the window hierarchy!

code

import UIKit

class SecondViewController: UIViewController {

    @IBAction func btnSubmit(sender: AnyObject) {
        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

        let thirdViewController = storyBoard.instantiateViewControllerWithIdentifier("successView") as ThirdViewController
        self.presentViewController(thirdViewController, animated:true, completion:nil)
    }

    @IBAction func btnBack(sender: AnyObject) {
        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

        let firstViewController = storyBoard.instantiateViewControllerWithIdentifier("methodView") as FirstViewController
        self.presentViewController(firstViewController, animated:true, completion:nil)

    }

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = UIColor(patternImage: UIImage(named: "bgCreateUser.jpg")!)
        // Do any additional setup after loading the view.
    }


}

Does this situation arise when "btnBack" is called or are you talking about pressing a back button on your nav bar? If it's the back button on your nav bar, please add the code from the previous view controller where you present SecondViewController? — Lyndsey Scott
this one not back button inside nav bar. It's just normal button. — Mohammad Nurdin

Woodster Woodster · Accepted Answer · 2014-12-24T04:24:30

Is btnBack supposed to go back to an earlier view controller? If so, instead of presenting a fresh instance, return to the previous one using:

dismissViewControllerAnimated(true, completion:nil)

Swift - warning: attempt to present on whose view is not in the window hierarchy

4 Answers