title: change title font of map callouts swift
body: <p>I would like to know if there is any way to change title font without creating a custom view? Something like this:</p>
  
  <pre><code>annotation.title.font = UIFont.systemFontOfSize(12.0)
  </code></pre>
  
  <p>I searched around, everyone says that I have to create a custom view like this <a href="http://blog.asynchrony.com/2010/09/building-custom-map-annotation-callouts-part-1/" rel="noreferrer">tutorial</a>, but it is so complicated and it's in objective-c.</p>
  
  <p>Hope somebody have a simple way to change the font.</p>
  
  <p>Thank you.</p>