在两个纬度和经度之间绘制折线

Question

我为源和目的地传递了两个纬度和经度，但是没有在两个点之间绘制折线。总是出现错误错误。下面的代码我在源坐标中传递了当前位置，在destCoordinates中传递了行驶位置。我想在sourceCoordinates和destCoordinates之间画一条折线。

  if(CLLocationManager.locationServicesEnabled()){
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.startUpdatingLocation()
    }

    //let sourceCoordinates = locationManager.location?.coordinate


      let sourceCoordinates = CLLocationCoordinate2DMake(19.115950,72.856448)
    let destCoordinates = CLLocationCoordinate2DMake(19.119670,72.853616)
    let sourcePlacemark = MKPlacemark(coordinate: sourceCoordinates)
         let destPlacemark = MKPlacemark(coordinate: destCoordinates)

    let sourceItem = MKMapItem(placemark: sourcePlacemark)
    let destItem = MKMapItem(placemark: destPlacemark)

    let directionRequest = MKDirectionsRequest()

    directionRequest.source=sourceItem
    directionRequest.destination=destItem



    directionRequest.transportType = .walking
    let directions = MKDirections(request: directionRequest)
    directions.calculate(completionHandler: {
    response,error in
        guard let response = response else{

           if let error = error {
            print("something wrong")
            }
            return
        }
        let route = response.routes[0]
        self.upcoming_info_map.add(route.polyline,level: .aboveRoads)
        let rekt = route.polyline.boundingMapRect
        self.upcoming_info_map.setRegion(MKCoordinateRegionForMapRect(rekt), animated: true)

    })

对于绘制折线，我使用此功能

    func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
    let renderer = MKPolygonRenderer(overlay:overlay)
    renderer.strokeColor = UIColor.blue
    renderer.lineWidth = 5.0
    return renderer
}

Answer 1

使用此方法。获取位置列表并绘制折线

    func addPolyLineToMap(googlemaplist: [CLLocation?]){


    var coordinates = googlemaplist.map({ (location: CLLocation!) -> CLLocationCoordinate2D in
        return location.coordinate
    })

    print("locatios count")
    print(googlemaplist.count)

    var polyline = MKPolyline(coordinates: &coordinates, count: googlemaplist.count)

    DispatchQueue.main.async {
        self.MapKit.add(polyline)

    }
}