Route not showing in MKMapView?

Question

I have these method that adds routes for MKMapView between two CLLocation. i have both valid pickUpDistanceLocation & dropOffDistanceLocation

Answer 1

For Swift 2.1 :

func addRoutesOverLayForMapView(){

    var source:MKMapItem?
    var destination:MKMapItem?
    let Scoordinate = CLLocationCoordinate2D(latitude: passLat, longitude: passLong)
    var sourcePlacemark = MKPlacemark(coordinate: CLLocationCoordinate2D(latitude: passLat, longitude: passLong), addressDictionary: nil)
    source = MKMapItem(placemark: sourcePlacemark)

    let DCoordinate = CLLocationCoordinate2D(latitude: lati, longitude: longi)
    var desitnationPlacemark = MKPlacemark(coordinate: DCoordinate, addressDictionary: nil)
    destination = MKMapItem(placemark: desitnationPlacemark)
    let request:MKDirectionsRequest = MKDirectionsRequest()
    request.source = source
    request.destination = destination
    request.transportType = MKDirectionsTransportType.Walking

    let directions = MKDirections(request: request)
    directions.calculateDirectionsWithCompletionHandler ({
        (response: MKDirectionsResponse?, error: NSError?) in

        if error == nil {

            self.showRoute(response!)
        }
        else{

            print("some error")

        }
    })
}

func showRoute(response:MKDirectionsResponse){
    for route in response.routes {
        mapView.addOverlay(route.polyline, level: MKOverlayLevel.AboveRoads)
        let routeSeconds = route.expectedTravelTime
        let routeDistance = route.distance
        print("distance between two points is \(routeSeconds) and \(routeDistance)")


    }

}


func mapView(mapView: MKMapView, rendererForOverlay overlay: MKOverlay) -> MKOverlayRenderer {

     let polylineRenderer = MKPolylineRenderer(overlay: overlay)

    if overlay is MKPolyline {
        polylineRenderer.lineDashPattern = [14,10,6,10,4,10]
        polylineRenderer.strokeColor = UIColor(red: 0.012, green: 0.012, blue: 0.012, alpha: 1.00)
        polylineRenderer.lineWidth = 2.5
        return polylineRenderer
    }
    return polylineRenderer

}

Answer 2

Actually both source and destination variables were nil.. So i got bad response from the server.If you need just try the below code

func addRoutesOverLayForMapView(){

    var source:MKMapItem?
    var destination:MKMapItem?
    var sourcePlacemark = MKPlacemark(coordinate: pickUpDistanceLocation!.coordinate, addressDictionary: nil)
    source = MKMapItem(placemark: sourcePlacemark)

    var desitnationPlacemark = MKPlacemark(coordinate: dropOffDistanceLocation!.coordinate, addressDictionary: nil)
    destination = MKMapItem(placemark: desitnationPlacemark)
    let request:MKDirectionsRequest = MKDirectionsRequest()
    request.setSource(source)
    request.setDestination(destination)
    request.transportType = MKDirectionsTransportType.Walking

    let directions = MKDirections(request: request)
    directions.calculateDirectionsWithCompletionHandler ({
        (response: MKDirectionsResponse?, error: NSError?) in

        if error == nil {

            self.showRoute(response!)
        }
        else{

        println("trace the error \(error?.localizedDescription)")

        }
    })
 }

func showRoute(response:MKDirectionsResponse){
    for route in response.routes as! [MKRoute]{
        mapView.addOverlay(route.polyline, level: MKOverlayLevel.AboveRoads)
        var routeSeconds = route.expectedTravelTime
        let routeDistance = route.distance
        println("distance between two points is \(routeSeconds) and \(routeDistance)")


    }

}

And you should implement this delegate method,dont forget to set the mapview delegate

  func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! {

        if overlay is MKPolyline {
            var polylineRenderer = MKPolylineRenderer(overlay: overlay)
            polylineRenderer.lineDashPattern = [14,10,6,10,4,10]
            polylineRenderer.strokeColor = UIColor(red: 0.012, green: 0.012, blue: 0.012, alpha: 1.00)
            polylineRenderer.lineWidth = 2.5
            return polylineRenderer
        }
        return nil

    }