Adding MKPolyline Overlay to MKMapView crashes application

Question

My application was working fine on iOS6 but it is crashing on iOS 7 due to bad access when I add overlay to MKMapView.My code is as follows

MKPolyline *polyl         


        

Answer 1

Use following If you are creating poly lines in thread other than main thread:

[self performSelectorOnMainThread:@selector(addPolyLineToMap:) withObject:polyline waitUntilDone:NO];

-(void)addPolyLineToMap:(MKPolyline*)apolyline{
    [mapview addOverlay:apolyline];
}