SWIFT Mapview MKRoutePolyline interiorPolygons: unrecognized selector sent to instance 0x14ed4b4d0

Question

I'm trying to make a navigation application

But this app crashes when I try to navigate and show "MKRoutePolyline

innerPolygons: unrecognized selector sent to instance 0x14ed4b4d0 "

What is wrong with my code?

import UIKit import MapKit class MapViewController: UIViewController, MKMapViewDelegate { var farm:Farm! var currentPlacemark:CLPlacemark? let locationManager = CLLocationManager() var currentTransportType = MKDirectionsTransportType.Automobile var currentRoute:MKRoute? @IBOutlet var mapView:MKMapView! @IBAction func showDirection(sender: AnyObject){ let directionRequest = MKDirectionsRequest() directionRequest.source = MKMapItem.mapItemForCurrentLocation() let destinationPlacemark = MKPlacemark(placemark: currentPlacemark!) directionRequest.destination = MKMapItem(placemark: destinationPlacemark) directionRequest.transportType = currentTransportType let directions = MKDirections(request: directionRequest) directions.calculateDirectionsWithCompletionHandler { (routeResponse, routeError) -> Void in guard let routeResponse = routeResponse else { if let routeError = routeError { print("Error: \(routeError)") } return } let route = routeResponse.routes[0] self.currentRoute = route self.mapView.removeOverlays(self.mapView.overlays) self.mapView.addOverlay(route.polyline, level: MKOverlayLevel.AboveRoads) } } func mapView(mapView: MKMapView, rendererForOverlay overlay: MKOverlay) -> MKOverlayRenderer { let renderer = MKPolygonRenderer(overlay: overlay) renderer.strokeColor = UIColor.yellowColor() renderer.lineWidth = 3.0 return renderer } 

Answer 1

It seems that you want to make a line.
but a polygon is a shape
so your code should be:

 let renderer = MKPolylineRenderer(overlay: overlay) 

But not:

 let renderer = MKPolygonRenderer(overlay: overlay) 

in

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