mkpolygonrenderer

问题 Ok I'm at my wits end. I'm new to MapKit and writing a health stats app that plots data on a MKMapView relative to where patients live. I can drop annotations, and draw polygons of postcode areas with no problem. However I'd like to write text on the map polygon (and not an annotation). Here's my code, I've subclassed MKPolygonRender to access drawRect. Polygons are perfect but no text. I've tried write to the first point in the polygon (I will find centre eventually) Been stuck for several