swift - MapKit MobileGestalt.c :1647: Could not retrieve region info

Question

我正在使用 MapKit显示两个注释和它们之间的距离。一切正常，但我一直在控制台上收到此错误。
MobileGestalt.c:1647: 无法检索区域信息
有谁知道是什么原因造成的？可能是.plist 中的一些权限吗？文件

这是完整的控制台输出:
2019-11-10 00:21:41.419108+0100 Post DACH[20420:264466] Metal API Validation Enabled
2019-11-10 00:21:41.567416+0100 Post DACH[20420:264466] libMobileGestalt MobileGestalt.c:1647: Could not retrieve region info


我的代码:

struct MapView: UIViewRepresentable {
    var requestLocation: CLLocationCoordinate2D
    var destinationLocation: CLLocationCoordinate2D
    private let mapView = WrappableMapView()

    func makeUIView(context: UIViewRepresentableContext<MapView>) -> MKMapView {
        mapView.delegate = mapView
        return mapView
    }

    func updateUIView(_ uiView: MKMapView, context: UIViewRepresentableContext<MapView>) {
        let requestAnnotation = MKPointAnnotation()
        requestAnnotation.coordinate = requestLocation
        requestAnnotation.title = "Package"
        uiView.addAnnotation(requestAnnotation)

        let destinationAnnotation = MKPointAnnotation()
        destinationAnnotation.coordinate = destinationLocation
        destinationAnnotation.title = "Destiantion"
        uiView.addAnnotation(destinationAnnotation)

        let sourcePlacemark = MKPlacemark(coordinate: requestLocation)
        let destinationPlacemark = MKPlacemark(coordinate: destinationLocation)

        let directionRequest = MKDirections.Request()
        directionRequest.source = MKMapItem(placemark: sourcePlacemark)
        directionRequest.destination = MKMapItem(placemark: destinationPlacemark)
        directionRequest.transportType = .automobile

        let directions = MKDirections(request: directionRequest)

        directions.calculate { (response, error) in
            guard let directionResponse = response else {
                if let error = error {
                    print(error.localizedDescription)
                }
                return
            }

            let route = directionResponse.routes[0]
            uiView.addOverlay(route.polyline, level: .aboveRoads)
            let rect: MKMapRect = route.polyline.boundingMapRect

            uiView.setVisibleMapRect(rect, edgePadding: .init(top: 50.0, left: 50.0, bottom: 50.0, right: 50.0), animated: true)
        }

    }
}

Answer 1

您可能错过了在代码中设置 MKMapView 委托(delegate)。

尝试设置mapView.delegate = self在您的 View 中，您已经实现了委托(delegate)方法。