title: How to edit the UIBlurEffect intensity?
body: <p>I don't want my background image to be too blury. Isn't there a property to adjust the blur intensity?</p>
  
  <pre><code>let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.Light)
  blurEffect.???
  let effectView = UIVisualEffectView(effect: blurEffect)
  effectView.frame = backgroundAlbumCover.bounds
  backgroundAlbumCover.addSubview(effectView)
  </code></pre>