ARGeoAnchor 在 RealityKit 应用程序中给我错误的坐标

Question

我正在尝试在我触摸屏幕的平面上添加一个 GeoAnchor。我已经设置了 ARGeoTrackingConfiguration，如下所示：

func makeUIView(context: Context) -> ARView {
        
        let arView = ARView(frame: .zero)
        
        let session = arView.session
        let config = ARGeoTrackingConfiguration()
        
        config.planeDetection = .horizontal
        session.run(config)
        
        
        // Start listening for location updates from Core Location
        locationManager.requestWhenInUseAuthorization()
        locationManager.startUpdatingLocation()
        
        
        arView.addGestureRecognizer(UITapGestureRecognizer(target: context.coordinator, action: #selector(Coordinator.onTap)))
        context.coordinator.arView = arView
        
       
        
        return arView
    }

在我的协调员中，我执行以下操作：

 @objc func onTap(_ recognizer: UITapGestureRecognizer) {
        
        guard let arView = arView else {
            return
        }
        
        let location = recognizer.location(in: arView)
        let results = arView.raycast(from: location, allowing: .estimatedPlane, alignment: .any)
        
        if let result = results.first {
            
            arView.session.getGeoLocation(forPoint: result.worldTransform.translation) { coordinate, altitude, error in
                print(coordinate)
                let geoAnchor = ARGeoAnchor(coordinate: coordinate, altitude: altitude)
                let anchor = AnchorEntity(anchor: geoAnchor)
                let box = ModelEntity(mesh: MeshResource.generateBox(size: 0.3), materials: [SimpleMaterial(color: .green, isMetallic: true)])
                anchor.addChild(box)
                arView.scene.addAnchor(anchor)
            }
        }
        
    }

getGeoLocation 函数总是返回坐标为 -180 和 -180，这是错误的。我所在的地区可以使用 GeoAnchors，但我不确定为什么它们不起作用。

In the documentation of arView.session.getGeoLocation it says "To succeed, this function requires an ARGeoTrackingConfiguration session with state equal to ARGeoTrackingStatus.State.localized". 

我不确定应该在哪里设置 ARGeoTrackingStatus.State.localized。

任何帮助！

Answer 1

您必须等待

ARSession.currentFrame

报告

.localized

的 geoTrackingStatus。然后 getGeoLocation 就可以工作了。