MapView inside custom cell delegate issue - ios

Question

I have created a tableview with a cell that has a mapView. I'm adding the annotation and trying to make a route between them. I have made the same thing with the same code from another view controller which is working fine but couldn't make the same in the tableview custom cell that has the map. It is not entering inside the viewForAnnotation or rendererForOverlay. I have enabled the mapDelegate to the view controller. So please where would be my issue?
let cell = tableView.dequeueReusableCellWithIdentifier("cell8") as! MapViewTableViewCell
cell.mapView.delegate = self //Tested didn't work
cell.mapView.setRegion(cell.mapView.regionThatFits(MKCoordinateRegionMakeWithDistance(sourceLocation.placemark.coordinate, 1800, 1800)), animated: true)
cell.calculateRoute(cell.endLocations, secondArray: cell.waypointLocations)
for item in cell.endLocations {
let annotation = MKPointAnnotation()
annotation.coordinate = item.placemark.coordinate
if cell.endLocations.indexOf(item) == 0 {
annotation.title = "start"
}
else {
annotation.title = "end"
}
cell.mapView.addAnnotation(annotation)
}
return cell
And I have made and extension for map
extension CarViewController : MKMapViewDelegate{
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
if (annotation.title! == "start") {
let pinAnnotation = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "identifier")
pinAnnotation.pinColor = .Green
return pinAnnotation
}
else if (annotation.title! == "end") {
let pinAnnotation = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "identifier")
pinAnnotation.pinColor = .Purple
return pinAnnotation
}
return nil
}
func mapView(mapView: MKMapView, rendererForOverlay overlay: MKOverlay) -> MKOverlayRenderer {
if overlay is MKPolyline {
let polylineRenderer = MKPolylineRenderer(overlay: overlay)
polylineRenderer.strokeColor = UIColor.greenColor()
polylineRenderer.alpha = 0.80
polylineRenderer.lineWidth = 5
return polylineRenderer
}
return MKPolylineRenderer()
}
}