title: Tab Bar Icon Size
body: <p>Apple <a href="https://developer.apple.com/ios/human-interface-guidelines/icons-and-images/custom-icons/" rel="noreferrer">says</a>:</p>
  
  <blockquote>
    <p>Depending on the device and orientation, the system displays either a regular or compact tab bar. Your app should include custom tab bar icons for both sizes.</p>
  </blockquote>
  
  <p>Unfortunately, they fail to specify when you get which.</p>
  
  <p>Also I might include those images for both sizes, but will the system switch between them automatically (how?) or do I have to do it myself?</p>