title: Pulse ring animation around a Google Maps marker iOS
body: <p>I want to add a pulse ring animation around a marker as a current user location in iOS google maps (like Uber). I tried with adding <code>CABasicAnimation</code> to marker layer by <code>addAnimation</code>. It is not working.  </p>
  
  <p>Also I tried animate the scale of the marker but the scale change did not happen. Can anybody help me with this thing?</p>