I am trying to implement an application which has a map and on that map there are several pins. Also I am implementing a custom callout view for the map annotations by sub classing the MKAnnotationView class.
Every thing is working fine but I am unable to draw the callout arrow and cannot calculate the exact position of the callout arrow so that it shows right on top of the annotation pin.
Currently I am just adding my custom callout view as a subview of MKAnnotationView and altering its frame. But cannot draw and position the callout arrow on the map.
You should check out the SMCalloutView project which has built out this functionality.