title: I want to give a extension method that return font of Int, It's right?
body: <p>Can I give a Int method that generate UIFont?</p>
  
  <pre><code>extension Int {
      var font: UIFont {
          return UIFont.fitMediumFont(size: CGFloat(self))
      }
  }
  </code></pre>
  
  <p>use it:</p>
  
  <pre><code>label.font = 16.font
  </code></pre>
  
  <p>My partner don't like this. But I think this API is more convenient and readable. I'm confused.</p>