问MKMapCamera调高在某些地方不起作用

EN

var mapCamera: MKMapCamera {
        
        // MARK: This sets the camera perspective and position.  It may be generally a 2D view showing the map from directly above or it may be a 3D view looking down the line

        return MKMapCamera(
            lookingAtCenter: cameraCenter(),
            fromDistance: cameraDistanceUsed * locations.cameraZoom,
            pitch: locations.cameraAngle,
            heading: locations.bearing()
        )
    }
    
    func cameraCenter() -> CLLocationCoordinate2D {
        
        // MARK: This sets the center of the map
        
        if locations.cameraZoom == CameraZoom.birdsEye.rawValue  {
            // In the 2D (birds-eye) view, set the camera center to be the midpoint of the scene so that the entire scene is visible.
            return locations.midpoint.scene
            
        } else {
            // In the 3D view, set the camera center to be the midpoint between the user and the target so that the map is aligned with the direction of the user
            return locations.midpoint.target
        }
    }

func makeUIView(context: Context) -> MKMapView {

        // MARK: This creates the satellite map
        
        let mapView = MKMapView()
        
        // Sets the map type to Satellite view
        mapView.preferredConfiguration = MKImageryMapConfiguration(elevationStyle: .realistic)
                
        // Shows the user's location on the map
        mapView.showsUserLocation = true
        
        // Sets the map camera and the coordinator
        mapView.delegate = context.coordinator
        mapView.camera = mapCamera
        
        mapView.isPitchEnabled = true
        
        //
        DispatchQueue.main.async {
            self.courseMap = mapView
        }
        
        return mapView
    }

enum CameraAngle: Double {
    
    // MARK:  This sets the value for the camera angle on the map.
    // Degrees of "0" means the camera is directly above the map, in a 2D "birds-eye" view.  Increasing the degrees of results in a more 3D view looking down the target line.
    
    case birdsEye = 0
    case threeD = 80
}

enum CameraZoom: Double {
    
    // MARK:  This sets the value for the camera zoom on the map.
    // Zoom factor of "2.2" is used for the 2D "birds-eye" view.  A lower zoom factor is used for 3D view looking down the target line since you don't need to see too far in the distance.
    
    case birdsEye = 2.2
    case threeD = 0.5
}

Button {
     // Change the camera angle and distance from the ground to create the 3D view where available
     locations.cameraAngle = CameraAngle.threeD.rawValue
     locations.cameraZoom = CameraZoom.threeD.rawValue
                    
} label: {
     Image(systemName: "chevron.up")
         .font(.title)
}

Button {
     // Raise the camera and set the angle to 0º to create the 2D "bird's eye" view of the map
    locations.cameraAngle = CameraAngle.birdsEye.rawValue
    locations.cameraZoom = CameraZoom.birdsEye.rawValue
                    
} label: {
    Image(systemName: "chevron.down")
        .font(.title)                        
}