Drawing a dashed line on GoogleMaps for iOS

gistfile1.m

- (void)drawDashedLineOnMapBetweenOrigin:(CLLocation *)originLocation destination:(CLLocation *)destinationLocation {
    [self.mapView clear];

    CGFloat distance = [originLocation distanceFromLocation:destinationLocation];
    if (distance < kMinimalDistance) return;

    // works for segmentLength 22 at zoom level 16; to have different length,
    // calculate the new lengthFactor as 1/(24^2 * newLength)
    CGFloat lengthFactor = 2.7093020352450285e-09;
    CGFloat zoomFactor = pow(2, self.mapView.camera.zoom + 8);
    CGFloat segmentLength = 1.f / (lengthFactor * zoomFactor);
    CGFloat dashes = floor(distance / segmentLength);
    CGFloat dashLatitudeStep = (destinationLocation.coordinate.latitude - originLocation.coordinate.latitude) / dashes;
    CGFloat dashLongitudeStep = (destinationLocation.coordinate.longitude - originLocation.coordinate.longitude) / dashes;

    CLLocationCoordinate2D (^offsetCoord)(CLLocationCoordinate2D coord, CGFloat latOffset, CGFloat lngOffset) =
        ^CLLocationCoordinate2D(CLLocationCoordinate2D coord, CGFloat latOffset, CGFloat lngOffset) {
        return (CLLocationCoordinate2D) { .latitude = coord.latitude + latOffset,
                                          .longitude = coord.longitude + lngOffset };
    };

    GMSMutablePath *path = GMSMutablePath.path;
    NSMutableArray *spans = NSMutableArray.array;
    CLLocation *currentLocation = originLocation;
    [path addCoordinate:currentLocation.coordinate];

    while ([currentLocation distanceFromLocation:destinationLocation] > segmentLength) {
        CLLocationCoordinate2D dashEnd = offsetCoord(currentLocation.coordinate, dashLatitudeStep, dashLongitudeStep);
        [path addCoordinate:dashEnd];
        [spans addObject:[GMSStyleSpan spanWithColor:UIColor.blueColor]];

        CLLocationCoordinate2D newLocationCoord = offsetCoord(dashEnd, dashLatitudeStep / 2.f, dashLongitudeStep / 2.f);
        [path addCoordinate:newLocationCoord];
        [spans addObject:[GMSStyleSpan spanWithColor:UIColor.clearColor]];

        currentLocation = [[CLLocation alloc] initWithLatitude:newLocationCoord.latitude
                                                     longitude:newLocationCoord.longitude];
    }

    GMSPolyline *polyline = [GMSPolyline polylineWithPath:path];
    polyline.map = self.mapView;
    polyline.spans = spans;
    polyline.strokeWidth = 4;
}

Same, it doesn't work anymore.