How can I go back to the initial view controller in Swift?

SWIFT: You should use an unwind segue.

1. First of all, put the following line in your FirstViewController:

   @IBAction func prepareForUnwind(segue: UIStoryboardSegue) {
   
   }
   

   The function actually doesn’t have any code inside it.

2. Now, go to your storyboard and create an unwind segue for LogoutViewController by control-dragging from the yellow button to the Exit button. Like this:

3. Select the unwind segue created for FirstViewController.

4. Change the segue identifier:

5. Go to the code of LogoutViewController and just call the unwind segue normally:

   self.performSegueWithIdentifier("unwindToViewController1", sender: self)
   

   Swift 4

   self.performSegue(withIdentifier: "unwindToViewController1", sender: self)