使用MapKit的MKMapView划线添加覆盖物

swift5

  // MARK: MKMapViewDelegate
func mapView(mapView: MKMapView, rendererForOverlay overlay: MKOverlay) -> MKOverlayRenderer {
    guard let polyline = overlay as? MKPolyline else {
        return MKOverlayRenderer()
    }
    
    let renderer = MKPolylineRenderer(polyline: polyline)
    renderer.lineWidth = 3.0
    renderer.alpha = 0.5
    renderer.strokeColor = UIColor.blueColor()
    return renderer
}
    
func createPolyline() {
        let point1 = CLLocationCoordinate2DMake(-73.761105, 41.017791);
        let point2 = CLLocationCoordinate2DMake(-73.760701, 41.019348);
        let point3 = CLLocationCoordinate2DMake(-73.757201, 41.019267);
        let point4 = CLLocationCoordinate2DMake(-73.757482, 41.016375);
        let point5 = CLLocationCoordinate2DMake(-73.761105, 41.017791);
        
        let points: [CLLocationCoordinate2D]
        points = [point1, point2, point3, point4, point5]
         // let geodesic = MKPolyline(coordinates: points, count: 5)
        let geodesic = MKGeodesicPolyline(coordinates: points, count: 5)
        mapView.addOverlay(geodesic)
        UIView.animate(withDuration: 1.5, animations: { () -> Void in
            let span = MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01)
            let region1 = MKCoordinateRegion(center: point1, span: span)
            self.mapView.setRegion(region1, animated: true)
        })
    }

OC

- (void) createGeoPolyline {

    CLLocationCoordinate2D point1 = { -73.761105, 41.017791 };
    CLLocationCoordinate2D point2 = { -73.760701, 41.019348 };
    CLLocationCoordinate2D point3 = { -73.757201, 41.019267 };
    CLLocationCoordinate2D point4 = { -73.757482, 41.016375 };
    CLLocationCoordinate2D point5 = { -73.761105, 41.017791 };

   CLLocationCoordinate2D points[] = {point1, point2, point3, point4, point5};

//MKPolyline 也是可以的
    MKGeodesicPolyline *geodesic = [MKGeodesicPolyline polylineWithCoordinates:&points[0] count:5];
    [self.mapView addOverlay:geodesic];

    [UIView animateWithDuration:1.5 animations:^{
        MKCoordinateRegion region;
        region.center = point1;

        MKCoordinateSpan span;
        span.latitudeDelta  = 0.01;
        span.longitudeDelta = 0.01;
        region.span = span;
        [self.mapView setRegion:region animated:YES];
    }];
}

    func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! {
        if overlay is MKPolyline {
            var polylineRenderer = MKPolylineRenderer(overlay: overlay)
            polylineRenderer.strokeColor = UIColor.blueColor()
            polylineRenderer.lineWidth = 5
            return polylineRenderer
        }

        return nil
    }

参考文章