SIGABRT error on ios simulator

Question

I use viewcontrollers with Navigation Controller . I press a UIButton on homescreeen and go another viewcontroller . When I click a UIButton on new viewcontroller , I go homescreen again. But when I press a UIButto n on homescreen, this time, it gives an error.

I created button with codes, not on storyboard.

What could be the problem? Some friends say, poptorootviewcontroller solves the problem, but I dont know adding it to button. Anyone can help?

here sa short video of it;

here is the code;

       override func viewDidLoad() {
        super.viewDidLoad()     

    let closeButton = UIButton()
    closeButton.frame = CGRect(x: screen.width - 70, y: 20, width: 60, height: 60)
    closeButton.setTitle("Skip", forState: .Normal)
    closeButton.setTitleColor(UIColor(red: 0.0/255.0, green: 0.0/255.0, blue: 0.0/255.0, alpha: 0.5), forState: .Normal)
    closeButton.titleLabel!.font =  UIFont.systemFontOfSize(16)
    closeButton.addTarget(self, action: #selector(OnboardingController2.pressed(_:)), forControlEvents: .TouchUpInside)
    view.addSubview(closeButton)
}


func pressed(sender: UIButton!) {

    audioPlayer?.stop();
    let loginPageView =  self.storyboard?.instantiateViewControllerWithIdentifier("HomePage") as! ViewController
    self.presentViewController(loginPageView, animated: true, completion: nil)

}

Answer 1

just replace the below code in your pressed button action. because when you are skipping and going to home view controller. you are presenting the controller so navigation is no more in the stack. and again when you press on the computer button it will try to push the controller and because navigation is no more in the stack it is crashing. when you are pressing the skip button try to pop view controller. like below.

func pressed(sender: UIButton!) {
    audioPlayer?.stop();
    self.navigationController?.popToRootViewControllerAnimated(true)
    // OR
    self.navigationController?.popViewControllerAnimated(true)
}