How can I clear MKMapView's cache of map tiles?

Question

I am working on an MKMapView based iPhone / iPad mapping app that overlays my own basic base map to provide for some limited functionality even when users are offline and ca

Answer 1

I stumbled across this question, and it's certainly an interesting problem. Clearly, the MKMapView is saving the tiles to disk somewhere (because it survives a reboot). I wonder if a potential solution would be to 1) locate where cached tiles are being saved, and then 2) programatically delete that cache when your app starts. This would require a jailbroken device to give you file access outside your application sandbox. Obviously unsuitable for distribution, but for testing would presumably be acceptable.

That said, when I had this problem I ended up just implementing my own tiled map view and running a reachability test to determine whether to display the google map or my offline mode.