How to draw a route between two locations using MapKit in Swift?

Question

How can I draw a route between user\'s current location to a specific location using MapKit in Swift?

I searched a lot, but didn\'t find any helpful

Answer 1

class MapController: UIViewController, MKMapViewDelegate {

func showRouteOnMap() {
    let request = MKDirectionsRequest()
    request.source = MKMapItem(placemark: MKPlacemark(coordinate: annotation1.coordinate, addressDictionary: nil))
    request.destination = MKMapItem(placemark: MKPlacemark(coordinate: annotation2.coordinate, addressDictionary: nil))
    request.requestsAlternateRoutes = true
    request.transportType = .Automobile

    let directions = MKDirections(request: request)

    directions.calculateDirectionsWithCompletionHandler { [unowned self] response, error in
        guard let unwrappedResponse = response else { return }

        if (unwrappedResponse.routes.count > 0) {
            self.mapView.addOverlay(unwrappedResponse.routes[0].polyline)
            self.mapView.setVisibleMapRect(unwrappedResponse.routes[0].polyline.boundingMapRect, animated: true)
        }
    }
}

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
}

The return is an array of possible routes, usually we just want to show the first. The annotations are the map annotations.