How do I create an image overlay and add to MKMapView?

Question

I am trying to learn MapKit and am now trying to add an image as an overlay to the map view. I can\'t seem to find any sample code to help explain how to do this.

Ca

Answer 1

From just looking at Apple's documentation for the MKOverlay protocol, it doesn't look very complex. Just make a class to do whatever you need to compute the overlay and make sure it conforms to that protocol. That means you must have the coordinate and boundingMapRect properties as well as an implementation for intersectsMapRect:. The Apple docs explain it all.

Take a look at the HazardMap sample code from Apple. It uses a custom overlay view like you want to do to display an image in the overlay. You simply need to implement mapView:viewForOverlay: in your MKMapViewDelegate class and return a new instance of your subclass of MKOverlayView to get the custom overlay drawn on the screen.