Not works NMANavigationManagerDelegate in HERE Map iOS SDK

Question

I'm using the HERE iOS SDK and I'm implementing a turn-by-turn navigation but method didUpdateManeuvers of NMANavigationManagerDelegate or any else is not called.

When I try to simulate move and use:

let source = NMARoutePositionSource(route: route.route)
NMAPositioningManager.sharedInstance().dataSource = source 

all works fine, but when I simulate move through GPX file or test in live, methods of delegate is not called...

My code:

class HereMapViewController: UIViewController {

    @IBOutlet private weak var mapView: NMAMapView!

    fileprivate var navigationManager = NMANavigationManager.sharedInstance()
    var route : NMAMapRoute?


    // MARK: - life cycle

    override func viewDidLoad() {
        super.viewDidLoad()

        setupUI()
    }

    deinit {
        navigationManager.stop()
    }


    // MARK: - private

    private func setupUI() {
        mapView.copyrightLogoPosition = .center
        mapView.zoomLevel = 10
        mapView.positionIndicator.isVisible = true
        mapView.gestureDelegate = self
        navigationManager.voicePackageMeasurementSystem = NMAMeasurementSystem.imperialUS
        navigationManager.backgroundNavigationEnabled = true
        navigationManager.isVoiceEnabled = true

        navigationManager.delegate = self
        setupRoute()
    }

    private func setupRoute() {
        guard let mapRoute = route, let routeStart = mapRoute.route.start else {
                return
        }

        let start = NMAGeoCoordinates(latitude: routeStart.navigablePosition.latitude,
                                      longitude: routeStart.navigablePosition.longitude)

        mapView.add(mapObject: mapRoute)
        mapView.set(boundingBox: mapRoute.route.boundingBox!, animation: NMAMapAnimation.none)

        startNavigation()
        mapView.set(geoCenter: start, animation: .none)
    }
    private func startNavigation() {
        guard let route = route else {
            return
        }

        navigationManager.map = mapView
        NMAPositioningManager.sharedInstance().dataSource = NMAHEREPositionSource()
        navigationManager.startTurnByTurnNavigation(route.route)
        navigationManager.mapTrackingEnabled = false
        navigationManager.mapTrackingAutoZoomEnabled = false
        navigationManager.mapTrackingOrientation = .dynamic
        navigationManager.isSpeedWarningEnabled = true

    }
}


//MARK: - NMANavigationManagerDelegate

extension HereMapViewController : NMANavigationManagerDelegate {
    // Signifies that there is new instruction information available
    func navigationManager(_ navigationManager: NMANavigationManager, didUpdateManeuvers currentManeuver: NMAManeuver?, _ nextManeuver: NMAManeuver?) {
        print("didUpdateManeuvers")
    }

    // Signifies that the system has found a GPS signal
    func navigationManagerDidFindPosition(_ navigationManager: NMANavigationManager) {
        print("New position has been found")
    }

    func navigationManager(_ navigationManager: NMANavigationManager, didFindAlternateRoute routeResult: NMARouteResult) {
        print("didFindAlternateRoute")
    }

    func navigationManager(_ navigationManager: NMANavigationManager, didUpdateRoute routeResult: NMARouteResult) {
        print("didUpdateRoute")
    }
}


//MARK: - NMAMapGestureDelegate

extension HereMapViewController : NMAMapGestureDelegate {

    func mapView(_ mapView: NMAMapView, didReceiveTwoFingerPan translation: CGPoint, at location: CGPoint) {
        navigationManager.mapTrackingAutoZoomEnabled = false
    }
}

I want to track, when I should change manoeuvre or when I need to create a new route if user went the wrong way. I will be grateful for the help.

Answer 1

Your snippet works for me. Make sure you don't get any console errors:

Access to this operation is denied.

or

This app has attempted to access privacy-sensitive data without a usage description. The app's Info.plist must contain both “NSLocationAlwaysAndWhenInUseUsageDescription” and “NSLocationWhenInUseUsageDescription” keys with string values explaining to the user how the app uses this data

NMAHEREPositionSource requires NSMotionUsageDescription key to be set in Info.plist. You can check if NMADevicePositionSource works for you.

To simulate movement with GPX file, use NMALoggedPositionSource

To force positioning broadcast, you can use startPositioning

Answer 2

You need to make sure you set your class properly to receive delegate behavior.

Check out this question's answers, particularly the second one from MakeAppPie. Delegates in swift?

Make sure you have followed all the steps.

Answer 3

Maybe you miss this line

navigationManager.setTrafficAvoidanceMode(.manual)

I have the same problem :/