Why is there bot an overlay view class and an overlay renderer class? Can I only use one or the other at a time? How do I decide which one to use?
Aah, here's what I needed to know: "In iOS 7 and later, use the
MKOverlayRenderer class to display overlays instead." That quotation comes from the documentation for MKOverlayView at https://developer.apple.com/documentation/mapkit/mkoverlayview.