问题描述

mapView中添加polyline

想在MapView中添加Polyline。代码如下：

CLLocationCoordinate2D coord[2];coord[1].latitude = 45.42207;coord[1].longitude = 9.123888;coord[2].latitude = 45.422785;coord[2].longitude = 9.12377;MKPolyline *polyline = [[MKPolyline alloc] init];polyline = [MKPolyline polylineWithCoordinates:coord count:2];[self.mapView addAnnotation:polyline];

但是报错： EXC_BAD_ACCESS.

解决方案

试试：

CLLocationCoordinate2D coord[2];coord[0].latitude = 45.42207;coord[0].longitude = 9.123888;coord[1].latitude = 45.422785;coord[1].longitude = 9.12377;MKPolyline *polyline = [[MKPolyline alloc] init];polyline = [MKPolyline polylineWithCoordinates:coord count:2];- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay {    MKPolylineView *polyLineView = [[MKPolylineView alloc] initWithPolyline:polyline];    polyLineView.fillColor = [UIColor blueColor];    polyLineView.strokeColor = [UIColor greenColor];    polyLineView.lineWidth = 7;    return polyLineView;}