title: UISlider with visual tracking popup view. Popup hidden behind other view elements
body: <p>I've been following (successfully) the following tutorial on how to build a UISlider subclass that draws a visual tracking popup view.</p>
  
  <p><a href="http://blog.neuwert-media.com/2011/04/customized-uislider-with-visual-value-tracking/" rel="nofollow">http://blog.neuwert-media.com/2011/04/customized-uislider-with-visual-value-tracking/</a></p>
  
  <p>My final issue comes to the fact that the popup view is being hidden by other view imageView elements. I've been looking for some sort of display order or preference setting but with no luck that would insist on displaying my popupview above the images.</p>