A user-movable dot on a map view?

What would be the best way to place a dot (a custom png) on an MKMapView, and allow the user to move the dot around the map. Additionally, when the finger is released, the map should center on the开发者_StackOverflow dot...

Are the any techniques which could make this possible?

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I think you should check out the MKOverlayView class, as this should help you out with drawing the custom png.

You could perhaps subclass this class and override the instance methods – touchesMoved:withEvent:, – touchesEnded:withEvent and – touchesCancelled:withEvent: to handle the user input?