title: Changing Storyboard in swift
body: <p>I am trying to switch from Main.storyboard to Main2.storyboard.
  Main.storyboard is connected to ViewController.swift and Main2.storyboard is connected to Main2.swift</p>
  
  <p>In ViewController.swift I have a button to switch to Main2.stoaryboard</p>
  
  <pre><code>@IBAction func btnSwitchStoryboard(sender: AnyObject) {
          let viewController = UIStoryboard(name: "Main2", bundle: nil).instantiateViewControllerWithIdentifier("Main2")
  
          self.presentViewController(viewController, animated: true, completion: nil)
      }
  </code></pre>
  
  <p>The problem is: When I press the button, the Main2.storyboard comes up from the button and goes down after one second, that I am back on Main.storyboard.</p>
  
  <p>How is it possible to stay at Main2.storyboard?</p>
  
  <p><em>I am developing on iOS 9.2 / xCode 7.2.1 / Swift</em></p>