Change view controller using action button

Question

How can I switch the view controller using UIButton? Here is my code:

@IBAction func scanAction(sender: AnyObject) {
      //switch view controller 
}

When I click the Scan button, it will go to a login form.

My view controller in Main.storyboard is like this

How might I proceed?

Answer 1

I already found the answer

let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

let nextViewController = storyBoard.instantiateViewControllerWithIdentifier("nextView") as NextViewController
self.presentViewController(nextViewController, animated:true, completion:nil)

Answer 2

One way is to just have a modal segue from a button. No IBOutlet required.

Programatically:

@IBAction func scanButton (sender: UIButton!) {

    performSegueWithIdentifier("nextView", sender: self)

}

You should add a modal segue and name the identifier. You connect the VC1 to VC2.