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 Swift-specific links or tutorials.

Answer 1

Swift 4

class MapController: UIViewController, MKMapViewDelegate {  // MARK: - showRouteOnMap  func showRouteOnMap(pickupCoordinate: CLLocationCoordinate2D, destinationCoordinate: CLLocationCoordinate2D) {      let sourcePlacemark = MKPlacemark(coordinate: pickupCoordinate, addressDictionary: nil)     let destinationPlacemark = MKPlacemark(coordinate: destinationCoordinate, addressDictionary: nil)      let sourceMapItem = MKMapItem(placemark: sourcePlacemark)     let destinationMapItem = MKMapItem(placemark: destinationPlacemark)      let sourceAnnotation = MKPointAnnotation()      if let location = sourcePlacemark.location {         sourceAnnotation.coordinate = location.coordinate     }      let destinationAnnotation = MKPointAnnotation()      if let location = destinationPlacemark.location {         destinationAnnotation.coordinate = location.coordinate     }      self.mapView.showAnnotations([sourceAnnotation,destinationAnnotation], animated: true )      let directionRequest = MKDirectionsRequest()     directionRequest.source = sourceMapItem     directionRequest.destination = destinationMapItem     directionRequest.transportType = .automobile      // Calculate the direction     let directions = MKDirections(request: directionRequest)      directions.calculate {         (response, error) -> Void in          guard let response = response else {             if let error = error {                 print("Error: \(error)")             }              return         }          let route = response.routes[0]          self.mapView.add((route.polyline), level: MKOverlayLevel.aboveRoads)          let rect = route.polyline.boundingMapRect         self.mapView.setRegion(MKCoordinateRegionForMapRect(rect), animated: true)     } }  // MARK: - MKMapViewDelegate  func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {      let renderer = MKPolylineRenderer(overlay: overlay)      renderer.strokeColor = UIColor(red: 17.0/255.0, green: 147.0/255.0, blue: 255.0/255.0, alpha: 1)      renderer.lineWidth = 5.0      return renderer } 

Answer 2

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.