ios - MKDirections : Directions Not Available

Question

我正在创建一个类似 UBER 的应用，我正在使用 MapKit，我想显示两个位置之间的路线，为此我有使用下面的代码

    viewMap.delegate = self

    let sourceLocation = CLLocationCoordinate2D(latitude: sourceLatitude, longitude: sourceLongitude)
    let destinationLocation = CLLocationCoordinate2D(latitude: destinationLatitude, longitude: destinationLongitude)

    let sourcePlacemark = MKPlacemark(coordinate: sourceLocation, addressDictionary: nil)
    let destinationPlacemark = MKPlacemark(coordinate: destinationLocation, addressDictionary: nil)

    let sourceMapItem = MKMapItem(placemark: sourcePlacemark)
    let destinationMapItem = MKMapItem(placemark: destinationPlacemark)

    let sourceAnnotation = MKPointAnnotation()
    sourceAnnotation.title = strSource

    if let location = sourcePlacemark.location {
        sourceAnnotation.coordinate = location.coordinate
    }


    let destinationAnnotation = MKPointAnnotation()
    destinationAnnotation.title = strDestination

    if let location = destinationPlacemark.location {
        destinationAnnotation.coordinate = location.coordinate
    }

    self.viewMap.showAnnotations([sourceAnnotation,destinationAnnotation], animated: true )

    let directionRequest = MKDirectionsRequest()

    directionRequest.source = sourceMapItem
    directionRequest.destination = destinationMapItem
    directionRequest.transportType = .automobile

    let directions = MKDirections(request: directionRequest)

    directions.calculate {
        (response, error) -> Void in

        guard let response = response else {
            if let error = error {
                print("Route Error: \(error)")
            }

            return
        }

        let route = response.routes[0]
        self.viewMap.add((route.polyline), level: MKOverlayLevel.aboveRoads)

        let rect = route.polyline.boundingMapRect
        self.viewMap.setRegion(MKCoordinateRegionForMapRect(rect), animated: true)
    }

扩展 HomeVC:MKMapViewDelegate

func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
    let renderer = MKPolylineRenderer(overlay: overlay)
    renderer.strokeColor = #colorLiteral(red: 0.2392156869, green: 0.6745098233, blue: 0.9686274529, alpha: 1)
    renderer.lineWidth = 2.0

    return renderer
}

我已经检查了所有可能的解决方案，我也获得了源位置和目标位置的纬度和经度，但我仍然无法正常工作，并且出现以下错误。

请帮我解决这个问题!

Answer 1

Apple map 方向仅适用于特定国家/地区。请在此处查看完整列表。 Apple Map Availability list (查看 map :方向部分)。您应该在您的应用中查看 Google Map SDK 是否针对以上链接中未列出的国家/地区。