Question

I have a MKMapView in my app with some overlays, which are shown correctly.
These overlays draw images inside the

- (void) drawMapRect:(MKMapRect)mapRect zoomScale:(MKZoomScale)zoomScale inContext:(CGContextRef)context

The MapView allows zooming and i want to avoid drawing the images at a specific zoom level

Is there a way to determine inside this method whether the overlay rectangle is greater than the mapview rectangle?

Answer 1

Let’s say your overlay is made from myOverlay (MyOverlay *) and myOverlayView (MyOverlayView *)

Inside - (void)drawMapRect:(MKMapRect)mapRect zoomScale:(MKZoomScale)zoomScale inContext:(CGContextRef)context you can get reference to myOverlay like this:

MyOverlay *myOverlay = (MyOverlay *)self.overlay;

It should be easy to compare myOverlay.boundingRect and mapRect from here on.