如何在iOS Swift中使用mapView和CLLocationManager绘制两个位置之间的方向

Question

我使用mapView.showUserLocation = true绘制用户位置，并将其显示为MKMapView对象上的注释。

现在，当我获得用户的位置时，我想要绘制一条从这组和弦到我的目的地的路径。我试着用MKDirections来做这个

我就是这么做的：

func mapView(mapView: MKMapView, didUpdateUserLocation userLocation: MKUserLocation) {
    mapView.showsUserLocation = true
    print("test")
    //Setting Up Source Location
    let sourceLocation = self.mapView.userLocation.coordinate
    let sourcePlacemark = MKPlacemark(coordinate: sourceLocation, addressDictionary: nil)
    let sourceMapItem = MKMapItem(placemark: sourcePlacemark)
    let sourceAnnotation = MKPointAnnotation()
    sourceAnnotation.title = "You are Here"

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

    //Setting Up Destination Location
    let destinationLocation = CLLocationCoordinate2D(latitude: 28.6621292, longitude: 77.30198310000003)
    let destinationPlacemark = MKPlacemark(coordinate: destinationLocation, addressDictionary: nil)
    let destinationMapItem = MKMapItem(placemark: destinationPlacemark)
    let destinationAnnotation = MKPointAnnotation()
    destinationAnnotation.title = "Conclave is Here"

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


    self.mapView.removeAnnotations(self.mapView.annotations)
    self.mapView.showAnnotations([sourceAnnotation,destinationAnnotation], animated: true)


    //Plotting a course from Source to Destination
    let directionRequest = MKDirectionsRequest()
    directionRequest.source = sourceMapItem
    directionRequest.destination = destinationMapItem
    directionRequest.transportType = .Automobile

    // Calculate the direction
    let directions = MKDirections(request: directionRequest)

    // 8.
    directions.calculateDirectionsWithCompletionHandler {
        (response, error) -> Void in

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

            return
        }

        let route = response.routes[0]
        self.mapView.addOverlay((route.polyline), level: MKOverlayLevel.AboveRoads)

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

}

然而，当我尝试调试它时，我会得到以下错误：Error: Error Domain=MKErrorDomain Code=5 "Directions Not Available" UserInfo=0x1742f7600 {NSLocalizedFailureReason=A route could not be determined between these locations., MKErrorGEOError=-403, MKDirectionsErrorCode=1, NSLocalizedDescription=Directions Not Available}

我做了一些研究，发现MKDirections在印度中是不可用的，所以我想知道如何向用户显示导航指南。

谢谢你的帮助！

Answer 1

Error Domain=MKErrorDomain Code=5 "Directions Not Available"

如果该位置不属于此列表中的任何国家：http://www.apple.com/ios/feature-availability/#maps-directions，则最有可能出现此错误。

在iOS模拟器上，您可以轻松地自定义当前位置。这样做有两种方法：

iOS模拟器-> 'Debug‘选项卡-> Location -> {Choose}

Xcode -> 'Debug‘选项卡->模拟位置-> {Choose}

，所以我建议您使用这个. GoogleMaps SDK并绘制路径。

https://gist.github.com/himanshu-benzatine/10670936c8f16ea1ae482bc6bb684adc

Answer 2

更好地使用google从源和目的地绘制polyline。您可以使用api

https://maps.googleapis.com/maps/api/distancematrix/json?units=imperial&origins=%@&destinations=%@&key=

然后，从可以绘制路径的位置获取lat long的json数据。在MKMapkit中解码json数据并绘制折线