title: Apply blur effect on tap or selected area if UIImageView
body: <p>I have a simple setup:</p>
  
  <p>UIViewController->UIView->UIImageView</p>
  
  <p>I want to achieve blur on UIImage which is loaded in UIImageView <strong>only on the area that user select or tap or move the finger</strong>.</p>
  
  <p>Is it possible using UIVisualEffectView?</p>