路径计算中的Sygic问题

Question

当我试图在我的Sygic脱机地图视图中添加一个路由时，我遇到了一个问题。在调试器中，我得到了一条消息“路由接口:请求未知传输模式”。这是我写的代码：

   class SygicMapViewController: UIViewController, SYNavigationDelegate,SYRoutingDelegate,SYMapViewDelegate,CLLocationManagerDelegate{
    let mapView = SYMapView()
    let routing = SYRouting()
    var  locationManager = CLLocationManager()
    override func viewDidLoad() {
        super.viewDidLoad()
        mapView.delegate = self
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation
        locationManager.requestAlwaysAuthorization()
        locationManager.requestWhenInUseAuthorization()
        locationManager.startUpdatingLocation()
    }
    func setupMapView(){
        let tiltFor2D: SYAngle = 0
        mapView.tilt = tiltFor2D
        mapView.zoom = 12
        mapView.rotation = 180
        mapView.frame = CGRect(x: 0, y: 0, width: self.view.frame.size.width, height:self.view.frame.size.height+20)
        self.view.addSubview(mapView)
        mapView.renderEnabled = true
    }
    func addMarkers(){

    }
    func mapView(_ mapView: SYMapView, didFinishInitialization success: Bool) {
        setupMapView()
        SYNavigation.shared().delegate = self
        routing.delegate = self
        let startPoint = SYGeoCoordinate(latitude: 37.270665, longitude:  9.873921)
        let endPoint = SYGeoCoordinate(latitude: 37.242681, longitude: 9.911932)
        computeRoute(from: startPoint!, to: endPoint!)
    }
    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        print(error)
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    func computeRoute(from fromCoordinate: SYGeoCoordinate, to toCoordinate:
        SYGeoCoordinate) {
        let startWaypoint = SYWaypoint(position: fromCoordinate, type: .start, name: "Begin")
        let endWaypoint = SYWaypoint(position: toCoordinate, type: .end, name: "End")
        let routingOptions = SYRoutingOptions()
        routingOptions.transportMode = .unknown// For other options see SYTransportMode
        routingOptions.routingType = .economic// For other options see SYRoutingType
        routing.computeRoute(startWaypoint, to: endWaypoint, via: nil, with: routingOptions)
    }

    func routing(_ routing: SYRouting, computingFailedWithError error: SYRoutingError) {
        print(error)
    }

    func routing(_ routing: SYRouting, didComputePrimaryRoute route: SYRoute?) {
        SYNavigation.shared().start(with: route)
        // You might want to put it also on the map
        let mapRoute = SYMapRoute(route: route!, type: .primary)
        mapView.add(mapRoute)
        mapView.cameraMovementMode = .followGpsPosition
    }
}

我通过在computeRoute方法中选择本地路由变量来纠正这个问题，并在地图视图实现后进行了一些更改以触发computeRoute方法

Answer 1

实际上，我在代码中看到了两个问题。

1. 在func computeRoute(from fromCoordinate: SYGeoCoordinate, to toCoordinate: SYGeoCoordinate)中，定义局部变量routing，它隐藏实例变量。这会导致路由在计算任何路由之前被取消分配。因此，只需从该方法中删除该let routing = SYRouting()，并使用实例routing变量即可。
2. 另一个也可能是一个问题，并造成问题。在地图初始化之前，您可以在viewDidLoad中开始路由。然后，如果路由更快，您将添加SYRoute对象进行映射，这可能会崩溃。我知道这只是一些快速的设置，但为了避免任何问题，请将调用转移到computeRoute，至少转移到mapView(_, didFinishInitialization)方法。