title: Seeing MKAnnotation Coordinates During Drag
body: <p>I want to be able to track the coordinates of my <code>MKAnnotation</code> as I drag it. Currently, I am only getting the coordinates as the drag begins.</p>
  
  <p>I have tried implementing a custom <code>MKAnnotationView</code> subclass with <code>touchesMoved</code>, however this appears not to work. (As suggested here: <a href="https://stackoverflow.com/questions/16626641/obtaining-mkannotations-coordinate-while-dragging">Obtaining MKAnnotation&#39;s coordinate while dragging</a>.)</p>
  
  <p>By receiving the new coordinates as I drag my annotation, I will in turn be able to update my polygon shape.</p>