title: Set background color of active tab bar item in Swift
body: <p>I'm hoping to accomplish this without the use of images, if at all possible. Is there a way to create the effect shown in the image programmatically without have to render each tab out as an image?</p>
  
  <p>Every question I've reviewed on SO has the tabs saved as JPGs, which is more work than I feel it should be.</p>
  
  <p>Any ideas?<img src="https://i.stack.imgur.com/fQAYd.jpg" alt="Tab Bar"></p>