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POChange coordinate of MKOverlay for an MKOverlayView
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copied!<p>I have an overlay on the map, and I would like to change its coordinates. To do this seamlessly I'm going to call the <a href="http://developer.apple.com/library/ios/#documentation/MapKit/Reference/MKOverlayView_class/Reference/Reference.html#//apple_ref/occ/cl/MKOverlayView">setNeedsDisplayInMapRect:</a> method after the change has been made to the view.</p> <p>I've tested this out by just changing the fillColor and it works fine:</p> <pre><code>overlayView.fillColor = [[UIColor greenColor] colorWithAlphaComponent:0.3]; [overlayView setNeedsDisplayInMapRect:mapView.visibleMapRect]; </code></pre> <p>However I've seemingly hit a brick wall trying to also change the center coordinates of my overlay view (which is an <a href="http://developer.apple.com/library/ios/#documentation/MapKit/Reference/MKCircleView_class/Reference/Reference.html">MKCircleView</a> with an <a href="http://developer.apple.com/library/IOs/#documentation/MapKit/Reference/MKCircle_class/Reference/Reference.html">MKCircle</a>). There is a method in <a href="http://developer.apple.com/library/IOs/#documentation/MapKit/Reference/MKAnnotation_Protocol/Reference/Reference.html#//apple_ref/occ/intf/MKAnnotation">MKAnnotation</a>, which MKCircle conforms to, called <a href="http://developer.apple.com/library/ios/#documentation/MapKit/Reference/MKAnnotation_Protocol/Reference/Reference.html#//apple_ref/occ/intf/MKAnnotation">setCoordinate:</a> - which seems like what I need. Unfortunately though, the <code>circle</code> property in MKCircleView is readonly. Moreover the <code>overlay</code> property in <a href="http://developer.apple.com/library/ios/#documentation/MapKit/Reference/MKOverlayView_class/Reference/Reference.html#//apple_ref/occ/cl/MKOverlayView">MKOverlayView</a> is also readonly.</p> <p>Is there actually a way of changing the coordinates for an overlay, without resort to remove the overlay view and adding a new one (which would cause very noticeable flicker on the screen.) ?</p>

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