title: UIMapKit change bubble color
body: <p>I was wondering if there's an easy way to change the color of the annotation's bubbles in a map.</p>
  
  <p>I know you can subclass MKAnnotationView, but it seems a lot of work just to change the color. Is there another way?</p>
  
  <p>This is what I'm trying to do. This design is missing the pin, though, it has to be like that but with a pin, like when using MKPinAnnotationView. <img src="https://i.stack.imgur.com/dJ6Ob.jpg" alt="enter image description here"></p>