mapkit overlay is readonly, how to remove them or refresh the entire mapview?

Question

The solution online to remove overlays and refresh mapview does absolutely nothing. I am sure I have all the delegates set correctly and everything hooked up. Looking for creative ways to solve this problem. What I intend to do is to show "directions" (the polyline) to new destination coordinates only, but not the old destination. But once they are added, they cannot be removed it seems...

 [mapView removeOverlays:[mapView overlays]];

and

 [mapView setNeedsDisplay];

both does nothing!

Try logging [mapView overlays] just before and after your call to removeOverlays: — Jesse Rusak, Jul 24 '12 at 16:12

score 0 · Answer 1 · answered Aug 06 '12 at 01:26

0

Are you sure there is nothing else wrong? The method to remove an overlay works fine, I use it all the time like this:

if (_directionsOverlay != nil) {
    [self.mapView removeOverlay:_directionsOverlay];
    _directionsOverlay = nil;
}

answered Aug 06 '12 at 01:26

myell0w

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score 0 · Answer 2 · answered Feb 19 '13 at 16:40

0

Make sure the call runs on the UI thread.

answered Feb 19 '13 at 16:40

goelectric

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mapkit overlay is readonly, how to remove them or refresh the entire mapview?

2 Answers2