如何在谷歌地图ios中为GMSPolyline添加动画

import GoogleMaps
import CoreLocation

class ViewController: UIViewController {

    var mapView: GMSMapView!
    var polyline: GMSPolyline!

    override func viewDidLoad() {
        super.viewDidLoad()

        // 创建地图视图
        let camera = GMSCameraPosition.camera(withLatitude: 37.7749, longitude: -122.4194, zoom: 12.0)
        mapView = GMSMapView.map(withFrame: view.bounds, camera: camera)
        view.addSubview(mapView)

        // 创建GMSPolyline对象
        let path = GMSMutablePath()
        path.addLatitude(37.7749, longitude: -122.4194)
        path.addLatitude(37.7749, longitude: -122.3894)
        polyline = GMSPolyline(path: path)
        polyline.strokeWidth = 5.0
        polyline.map = mapView

        // 创建动画效果
        let animation = CABasicAnimation(keyPath: "path")
        animation.fromValue = polyline.path
        animation.toValue = path
        animation.duration = 5.0
        animation.repeatCount = .infinity

        // 将动画添加到地图视图上
        mapView.layer.add(animation, forKey: "pathAnimation")
    }
}