gistfile1.m

- (void)viewDidLoad
{
    [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.

    MKPlacemark *firstPlacemark = [[MKPlacemark alloc] initWithCoordinate:CLLocationCoordinate2DMake(55.755768, 37.617671)
                                                        addressDictionary:nil];
    MKPlacemark *secondPlacemark = [[MKPlacemark alloc] initWithCoordinate:CLLocationCoordinate2DMake(55.910528, 37.736339)
                                                         addressDictionary:nil];
    
    [self.mapView showAnnotations:@[ firstPlacemark, secondPlacemark ] animated:NO];
    
    MKMapItem *firstMapItem = [[MKMapItem alloc] initWithPlacemark:firstPlacemark];
    MKMapItem *secondMapItem = [[MKMapItem alloc] initWithPlacemark:secondPlacemark];
    
    MKDirectionsRequest *routeRequest = [[MKDirectionsRequest alloc] init];
    routeRequest.source = firstMapItem;
    routeRequest.destination = secondMapItem;
    
    MKDirections *directions = [[MKDirections alloc] initWithRequest:routeRequest];
    [directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {
        MKRoute *firstRoute = [response.routes firstObject];
        [self.mapView addOverlay:firstRoute.polyline level:MKOverlayLevelAboveLabels];
    }];
}

- (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id <MKOverlay>)overlay
{
    MKOverlayPathRenderer *pathRenderer = [[MKOverlayPathRenderer alloc] initWithOverlay:overlay];
    pathRenderer.fillColor = [UIColor redColor];
    pathRenderer.strokeColor = [UIColor magentaColor];
    return pathRenderer;
}