title: Trigger when 'myLocation' button tapped (Google Maps SDK for iOS)
body: <p>I want to do some stuff when 'myLocation' button tapped.
  So far, I've the <code>UIButton</code> itself:</p>
  
  <pre><code>UIButton *btnMyLoc = (UIButton*)[self.googleMapView subviews].lastObject;
  </code></pre>
  
  <p>But it's not enough.
  Any ideas?</p>