title: How to set a custom font for entire iOS app without specifying size
body: <p>I'm trying to apply a custom font throughout my <code>iOS app</code>. I found that I could use:</p>
  
  <pre><code> [[UILabel appearance] setFont:[UIFont fontWithName:@"Proxima Nova" size:17.0]];
  </code></pre>
  
  <ul>
  <li><p>To set the default font and size for all <code>UILabels</code>. However, not all my <code>UILabels</code> share the same font size. </p></li>
  <li><p>In <a href="https://stackoverflow.com/questions/8707082/set-a-default-font-for-whole-ios-app">Set a default font for whole iOS app?</a>, someone had the same concern, and was told to set the size parameter to 0.0 to only set the font and not font size. </p></li>
  <li>When I tried doing this, all the <code>UILabel</code> text in my app disappeared (because evidently <code>iOS</code> took the 0.0 font size literally). </li>
  </ul>
  
  <p>Any suggestions as to how I can universally set a font but not size? Thanks a lot!</p>