title: UIPopoverPresentationController dimming background darker
body: <p>I want darker background dim color for <code>UIPopover</code>. I know this can be achieved by subclassing <code>UIPopoverBackgroundView</code> as mentioned  <a href="https://stackoverflow.com/questions/21167466/how-to-add-dimmed-background-to-a-custom-uipopoverbackgroundview">here</a> but I am looking for any simpler way to do this. </p>
  
  <p>P.S. <strong>I am using Objective C not Swift</strong>.</p>