swift - 计算路线的 Sygic 问题

Question

当我尝试在我的 Sygic 离线 map View 中添加路线时遇到问题。在调试器中，我收到这条消息“路由接口(interface):询问未知的传输模式。”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，我做了一些更改以在 mapview 初始化之后触发 computeRoute 方法

Answer 1

实际上我发现您的代码有两个问题。

1. 在 func computeRoute(from fromCoordinate: SYGeoCoordinate, to
toCoordinate: SYGeoCoordinate) 你定义局部变量routing它隐藏了实例变量。这导致路由是在它可以计算任何路由之前释放。所以只需删除它let routing = SYRouting() 来自该方法并使用实例路由变量。
2. 另一个也可能是一个问题并导致问题。你先来在初始化 map 之前在 viewDidLoad 中进行路由。那么如果路由更快你将添加 SYRoute 对象来映射和那可能会崩溃。我知道这只是一些快速设置，但是为避免任何问题，至少将调用 computeRoute 移动到mapView(_, didFinishInitialization) 方法。