iOS Swift Getting directions between two points and drawing to map - ios

Question

I want to get the directions between two points and draw them to my MKMapView. This is my implementation:
First, at my controller's viewDidLoad callback, I set map's view delegate to self
map.delegate = self
Then, I request all routes:
func showDirections() {
let currentPlace: MKPlacemark = MKPlacemark(coordinate: location.coordinate, addressDictionary: nil)
let place: MKPlacemark = MKPlacemark(coordinate: annotation.coordinate, addressDictionary: nil)
println(currentPlace.coordinate.latitude)
println(currentPlace.coordinate.longitude)
println(place.coordinate.latitude)
println(place.coordinate.longitude)
var request: MKDirectionsRequest = MKDirectionsRequest.new()
request.setSource(MKMapItem(placemark: currentPlace))
request.setDestination(MKMapItem(placemark: place))
request.transportType = MKDirectionsTransportType.Any
request.requestsAlternateRoutes = true
var directions: MKDirections = MKDirections(request: request)
directions.calculateDirectionsWithCompletionHandler() {
(response, error) in
println(error)
if(error == nil && response != nil) {
println("Numero de rutas: " + String(response.routes.count))
println(response.routes[0].coordinate)
for(var i = 0;i < response.routes.count; i++) {
self.map.addOverlays(response.routes[i].overlays, level: MKOverlayLevel.AboveRoads)
self.map.setNeedsDisplay()
}
for r in response.routes { println("route = \(r)") }
}
}
}
And implement this two callbacks too:
func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! {
println("redenrerForOverlay")
if(overlay.isKindOfClass(MKPolyline)) {
var renderer: MKPolylineRenderer = MKPolylineRenderer(overlay: overlay)
renderer.strokeColor = Colors.psnGreen
renderer.lineWidth = 5
return renderer
}
return nil
}
func mapView(mapView: MKMapView!, viewForOverlay overlay: MKOverlay!) -> MKOverlayView! {
println("ViewForOverlay")
if (overlay.isKindOfClass(MKPolyline)) {
var lineView: MKPolylineView = MKPolylineView(overlay: overlay)
lineView.backgroundColor = Colors.psnGreen
return lineView;
}
return nil;
}
When i run my application, I get two routes to draw, but when I call map.addOverlay, nothing happens. My rendererForOverlay/viewForOverlay are never called. Somenone know how to make it work?
Thanks in advance

Answer 1

I finnaly got the solution
For those who are interested, only change the directions callback to this:
directions.calculateDirectionsWithCompletionHandler() {
(response, error) in
if(error == nil && response != nil) {
for route in response.routes {
var r: MKRoute = route as! MKRoute
self.map.addOverlay(r.polyline, level: MKOverlayLevel.AboveRoads)
}
}
}