title: SlideMenuController left menu showing from start
body: <p>I'm using SlideMenuControllerSwift but it's showing a portion of my left view from start, when I didn't even clicked the menu button. Any idea why this happens? </p>
  
  <pre><code>let vc = UIStoryboard(name: "Main", bundle: nil).instantiateInitialViewController()!
      let leftViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "filterViewControllerID")
      let slide = SlideMenuController(mainViewController: vc, leftMenuViewController: leftViewController)
      UIApplication.shared.keyWindow?.rootViewController = slide
  </code></pre>
  
  <p>This is a screenshot:</p>
  
  <p><a href="https://i.stack.imgur.com/KQkw9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KQkw9.png" alt="enter image description here"></a></p>