MKDirections not showing route on map in iOS

Question

I am working on one app, I need to show route directions between two coordinates. I have used MKDirections and have passed two coordinates as source and destination, however on mapView its not showing any route or drawing any polyline. Below is my code. In MKDirections its always showing nil. Please let me know what I am doing wrong.

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.activityIndicator.hidden = YES;
    self.routeDetailsButton.hidden = YES;
    self.routeDetailsButton.enabled = NO;
    self.mapView.delegate = self;
    self.mapView.showsUserLocation = YES;
    self.navigationItem.title = @"RouteMaster";

}

#pragma mark - MapKit delegate methods

- (void)mapView:(MKMapView *)aMapView didUpdateUserLocation:(MKUserLocation *)userLocation {
    CLLocationCoordinate2D loc = [userLocation.location coordinate];
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(loc, 1000.0f, 1000.0f);
    [self.mapView setRegion:region animated:YES];
}


- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}

- (IBAction)handleRoutePressed:(id)sender {
    // We're working

    CLLocationCoordinate2D sourceCoords = CLLocationCoordinate2DMake(28.6100, 77.2300);
    MKPlacemark *sourcePlacemark = [[MKPlacemark alloc] initWithCoordinate:sourceCoords addressDictionary:nil];

    MKMapItem *srcMapItem = [[MKMapItem alloc]initWithPlacemark:sourcePlacemark];

    CLLocationCoordinate2D destinationCoords = CLLocationCoordinate2DMake(18.9750, 72.8258);
    MKPlacemark *destinationPlacemark = [[MKPlacemark alloc] initWithCoordinate:destinationCoords addressDictionary:nil];

    MKMapItem *distMapItem = [[MKMapItem alloc]initWithPlacemark:destinationPlacemark];

    MKDirectionsRequest *request = [[MKDirectionsRequest alloc]init];
    [request setSource:srcMapItem];
    [request setDestination:distMapItem];

    MKDirections *direction = [[MKDirections alloc]initWithRequest:request];
    [direction calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {

         if (error)
             NSLog(@"Error %@", error.description);
        else
            NSLog(@"response = %@",response);
        NSArray *arrRoutes = [response routes];
        [arrRoutes enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {

            MKRoute *rout = obj;

            MKPolyline *line = [rout polyline];
            [self.mapView addOverlay:line];
            NSLog(@"Rout Name : %@",rout.name);
            NSLog(@"Total Distance (in Meters) :%f",rout.distance);

            NSArray *steps = [rout steps];

            NSLog(@"Total Steps : %lu",(unsigned long)[steps count]);

            [steps enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
                NSLog(@"Rout Instruction : %@",[obj instructions]);
                NSLog(@"Rout Distance : %f",[obj distance]);
            }];
        }];
    }];

}

#pragma mark - Utility Methods
- (void)plotRouteOnMap:(MKRoute *)route
{
    if(_routeOverlay) {
        [self.mapView removeOverlay:_routeOverlay];
    }

    // Update the ivar
    _routeOverlay = route.polyline;

    // Add it to the map
    [self.mapView addOverlay:_routeOverlay];

}


#pragma mark - MKMapViewDelegate methods
- (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay
{
    MKPolylineRenderer *renderer = [[MKPolylineRenderer alloc] initWithPolyline:overlay];
    renderer.strokeColor = [UIColor redColor];
    renderer.lineWidth = 4.0;
    return  renderer;
}

- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id)overlay {

    if ([overlay isKindOfClass:[MKPolyline class]]) {
        MKPolylineView* aView = [[MKPolylineView alloc]initWithPolyline:(MKPolyline*)overlay] ;
        aView.strokeColor = [[UIColor blueColor] colorWithAlphaComponent:0.5];
        aView.lineWidth = 10;
        return aView;
    }
    return nil;
}

You don't need to specify an addressDictionary but be aware that MKDirections does not support directions in every part of the world. This code must be showing the error "MKErrorDomain Code=5 Directions Not Available". Test this code with coordinates in the US or Europe. — , Jun 23 '14 at 12:26

score 1 · Answer 1 · answered Jul 28 '16 at 13:49

Mostly this error occur if [_mapView setRegion:region] area and polyline route path are not on same region(both should need to display on same screen). In my case I was searching for USA route path while my region was India. So it wont call to -(MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id)overlay; function.

score 0 · Accepted Answer · answered Jun 23 '14 at 09:16

0

add this method

-(MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay {

    MKPolylineRenderer  * routeLineRenderer = [[MKPolylineRenderer alloc] initWithPolyline:overlay];

    routeLineRenderer.strokeColor = [UIColor blueColor];
    routeLineRenderer.lineWidth = 4;
    return routeLineRenderer;
}

answered Jun 23 '14 at 09:16

user2931321

468
1
7
28

I have added that, however its not getting drawn, I thing its not going inside blocks statement, do i need to assign any delegate for MKOverlayRenderer. – Kashif Jilani Jun 23 '14 at 09:18
Its not showing any error, its not drawing or showing directions on mapview – Kashif Jilani Jun 23 '14 at 09:30
add after calculateDirectionsWithCompletionHandler if (error) NSLog(@"Error %@", error.description); – user2931321 Jun 23 '14 at 09:32
I have edited my question with source code. Please let me know what i am doing wrong. Its not even going inside error statement. – Kashif Jilani Jun 23 '14 at 09:41
addressdictionary cannot be nil you have to pass the address – user2931321 Jun 23 '14 at 09:48
oh, what kind of Address do we need to pass, please let me know. I am not aware of this. – Kashif Jilani Jun 23 '14 at 10:08
follow link to get address dictionary http://stackoverflow.com/questions/5604392/convert-mkplacemark-addressdictionary-string-encoded – user2931321 Jun 23 '14 at 10:21

MKDirections not showing route on map in iOS

2 Answers2