如何在iOS上动态更新Mapbox的MGLShapeSource的MGLPointFeature属性值？

let shapeSource = MGLShapeSource(identifier: "myShapeSource", url: URL(string: "your_geojson_url"))
mapView.style?.addSource(shapeSource)

let circleLayer = MGLCircleStyleLayer(identifier: "myCircleLayer", source: shapeSource)
mapView.style?.addLayer(circleLayer)

if let shapeSource = mapView.style?.source(withIdentifier: "myShapeSource") as? MGLShapeSource {
    if let features = shapeSource.features(in: mapView.visibleCoordinateBounds) as? [MGLPointFeature] {
        for feature in features {
            // 更新属性值
            feature.attributes["propertyKey"] = "propertyValue"
        }
        
        // 重新加载数据
        shapeSource.shape = MGLShapeCollectionFeature(shapes: features)
    }
}