title: Swift 2 MapKit Annotations - How to group annotations?
body: <p>I have close to 8.000 annotations in my map and I'd like to group them depending of the zoom that the user do in the app.</p>
  
  <p>All the latitudes and longitudes are already into the CoreData as Double.</p>
  
  <p>Case I have two different annotation images in the same point, I'd like to show two groups, one with the cross and one with the heart.</p>
  
  <p>When the user click over the annotation and if this annotation is a grouped annotation, I'd like to show to the user how many annotations has at this location, "forcing" the user to zoom in to see the annotations individually.</p>
  
  <p>Bellow are the images of my app and the current annotations.</p>
  
  <p>Thank you!</p>
  
  <p><a href="https://i.stack.imgur.com/Np02H.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Np02H.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/HLfWA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HLfWA.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/PxwKz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PxwKz.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/DoXlh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DoXlh.png" alt="enter image description here"></a></p>