Smooth MKPolyline to follow the road

Get full code : https://github.com/javedmultani16/MapKitWithPolyLine

Here is code for the same:

var locRoute : MKRoute?
    var directionsRequest = MKDirections.Request()
    var arrayPlacemarks = [MKMapItem]()
    var selectedPin:MKPlacemark? = nil
    let locationManager = CLLocationManager()

And write below code on ViewDidLoad():

override func viewDidLoad() {
        super.viewDidLoad()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestWhenInUseAuthorization()
        locationManager.requestLocation()

        locationSearchTable.mapView = mapView
        mapView.delegate = self
    }

Now go for delegate methods:

extension ViewController : MKMapViewDelegate {
    func mapView(_: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView?{
        if annotation is MKUserLocation {
            //return nil so map view draws "blue dot" for standard user location
            //Add source location as user location
            let arrayPlacemarksource = MKPlacemark(coordinate: annotation.coordinate, addressDictionary: nil)
            arrayPlacemarks.append(MKMapItem(placemark…