如何使用mapView和CLLocationManager在iOS Swift中的两个位置之间绘制方向

Question

I am using mapView.showUserLocation = true to plot user location and display it as an Annotation on my MKMapView object.

Now, when I have obtained the users' location, I want to plot a path from that set of coords to my destination. I tried using MKDirections for this

Here is how I was trying to do it:

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)
    }

}

However, when I tried debugging it, I get the following error: 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}

I did some research and found out that MKDirections in not available in India , so I was wondering how to can get around showing Navigation Directions to the user.

Thanks for the help!

Answer 1

Better to use google api to draw polyline from source & destination. You can use the api

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

Then you get the json data of lat long(s) from where path can be drawn. Decode the json data and draw polyline in MKMapkit

Answer 2

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

You are most likely to get this error if the location doesn't belong to any of the countries in this list: http://www.apple.com/ios/feature-availability/#maps-directions

While on iOS simulator, you can easily customize your current location. Two ways to do it:

iOS Simulator -> 'Debug' tab -> Location -> {Choose}

Xcode -> 'Debug' tab -> Simulate Location -> {Choose}

So i suggest you to Use this. GoogleMaps SDK and draw route.

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