MapBox polyline not shown on map - ios

Question

I have a problem when trying to add a polyline on the map.
I get directions from MKDirections, and create a RMPolylineAnnotation, but it does not appear on the map.
As I can see, the following method is called just once when the map appears:
- (RMMapLayer *)mapView:(RMMapView *)mapView layerForAnnotation:(RMAnnotation *)annotation
Here is the code I am using:
- (void)getRoute {
CLLocation *source = [[CLLocation alloc] initWithLatitude:self.mapView.userLocation.coordinate.latitude longitude:self.mapView.userLocation.coordinate.longitude];
CLLocation *destination = [[CLLocation alloc] initWithLatitude:self.mapView.selectedAnnotation.coordinate.latitude longitude:self.mapView.selectedAnnotation.coordinate.longitude];
[AppleDirectionManager getDirectionsFromPoint:source toPoint:destination transportType:MKDirectionsTransportTypeAutomobile withCompletion:^(MKDirectionsResponse *result) {
self.routeStepsArray = [[result.routes firstObject] steps];
for (MKRoute *route in result.routes) {
NSMutableArray *points = [NSMutableArray array];
for (int i = 0; i < route.polyline.pointCount; i++) {
MKMapPoint point = route.polyline.points[i];
CLLocation *location = [[CLLocation alloc] initWithLatitude:point.x longitude:point.y];
[points addObject:location];
}
dispatch_async(dispatch_get_main_queue(), ^{
NSArray *arr = [points copy];
RMPolylineAnnotation *polyline = [[RMPolylineAnnotation alloc] initWithMapView:self.mapView points:arr];
[self.mapView addAnnotation:polyline];
});
}
}];
}
- (RMMapLayer *)mapView:(RMMapView *)mapView layerForAnnotation:(RMAnnotation *)annotation {
if (annotation.isUserLocationAnnotation)
return nil;
RMMarker *marker = [[RMMarker alloc] initWithUIImage:[UIImage imageNamed:#"blabla.png"]];
[marker setCanShowCallout:YES];
[marker setName:#"blabla"];
return marker;
}
Also I can not show a custom callout for a RMPointAnnotation.

Answer 1

For RMPointAnnotation it's easily.
_polylineAnnotation = [[RMPolylineAnnotation alloc] initWithMapView:_mapView points:#[Location,Location]];
_polylineAnnotation.lineColor = [UIColor redColor];
_polylineAnnotation.lineWidth = 10.0f;
[_mapView addAnnotation:_polylineAnnotation];