How do I remove this Polyline of the map route? - ios

Question

Hi guys so what I'm trying to do is create a button that triggers the findRandomPlace() func. Its suppose to show me a random place in places array. When it gives me a random place it should draw the polyline from the source to destination (which it does) and then if I don't like that place I can click the Button again and it should show me another place (which it does), the problem is the polyline from the last place. I don't know how to remove it.
let route = response.routes[0]
self.Map.add(route.polyline, level: .aboveRoads)
The above code is what draws the polyline but im not sure what I can do to remove it.
Thanks in advance if you could pitch in any ideas.
var previousIndex:Int = 999999
func findRandomPlace() {//need an if statement to check if its near u or in the area
let randomIndex = Int(arc4random_uniform(UInt32(places.count)))
if randomIndex != previousIndex {//Makes sure next place can't be current place
previousIndex = randomIndex
Name.text = (places[randomIndex][0])
Description.text = (places[randomIndex][1])
//Draw Direction Line
let positionX:Double? = Double(places[randomIndex][2])
let positionY:Double? = Double(places[randomIndex][3])
let sourceCoordinates = manager.location?.coordinate
let destinationCoordinates = CLLocationCoordinate2DMake(positionX!, positionY!)
print(sourceCoordinates!)
let sourcePlacemark = MKPlacemark(coordinate: sourceCoordinates!)
let destinationPlacemark = MKPlacemark(coordinate: destinationCoordinates)
let sourceItem = MKMapItem(placemark: sourcePlacemark)
let destinationItem = MKMapItem(placemark: destinationPlacemark)
let directionRequest = MKDirectionsRequest()
directionRequest.source = sourceItem
directionRequest.destination = destinationItem
directionRequest.transportType = .walking
let directions = MKDirections(request: directionRequest)
directions.calculate(completionHandler: {
response, error in
//Draw Polyline and Zoom Into It
guard let response = response else {
if let error = error {
print("error")
}
return
}
let route = response.routes[0]
self.Map.add(route.polyline, level: .aboveRoads)
let rect = route.polyline.boundingMapRect
self.Map.setRegion(MKCoordinateRegionForMapRect(rect), animated: true)
})
} else {
findRandomPlace()
}
}

Answer 1

I figured it out myself.
I am ashamed it took so long but I'm happy I found out in the end.
self.Map.removeOverlays(self.Map.overlays)