title: Toggle UIBlurEffect in swift iOS8
body: <p>I want to toggle the blur effect on top of an image I have on my iOS8 app. I know that from the basic idea of this if/else implementation is wrong, but I've got no clue how to do it correctly since I'm new to this. Any recomendation would be gladly accepted. </p>
  
  <p>I'd also like to toggle text on top of the blurred image.</p>
  
  <p>I've got this global constant in my view controller</p>
  
  <pre><code>var cont: Int = 0
  </code></pre>
  
  <p>And here is the @IBAction related to a button on top of my image.</p>
  
  <pre><code>@IBAction func moreInfo(){
  
      /* First, create the blur effect with the "Dark" style.
      All the styles are defined in UIBlurEffectStyle */
      let blurEffect = UIBlurEffect(style: .Dark)
  
      /* Then create the effect view, using the blur effect that
      we just created. The effect is of type UIVisualEffect */
      let blurView = UIVisualEffectView(effect: blurEffect)
      blurView.frame.size = CGSize(width: 200, height: 250)
      blurView.center = CGPoint(x: 160, y: 250)
  
  
      /* Toggle blur*/
      if (cont == 0){
  
          view.addSubview(blurView)
      } else {
  
          /* view.removeFromSuperview(blurView)??? */ //Here should be a way to remove the blur
  
  
      }
  
  
  }
  </code></pre>