使用google direction api绘制路径

Question

​

​

我试图用google direction api在多个地方之间绘制路径，但问题是当我缩放地图时，路径不能正确绘制。

我正在点击这个api，并从JSON的响应中画出带有'overview_polyline‘点的路径。

https://maps.googleapis.com/maps/api/directions/json?origin=(startLocationLat),(startLocationLong)&destination=(endLocationLat),(endLocationLong)&waypoints=(self.wayPointBetweenLocations)&key=AIzaSyCK0dxRGRlFqM84SUM3zbVQAdbXEXtN-x0&mode=driving

let polygon = GMSPolygon()
polygon.path = GMSPath(fromEncodedPath: "\(self.overview_points)")

请帮我弄一下这个。谢谢

Answer 1

使用GMSPolyline而不是GMSPolygon绘制路径。

示例

    let path = GMSPath(fromEncodedPath: "\(self.overview_points)")
    let directionPolyline = GMSPolyline(path: path)
    directionPolyline.strokeColor = UIColor.blue
    directionPolyline.strokeWidth = 3
    directionPolyline.map = self.mapView

Answer 2

尝试使用Google Maps Roads API part Snap to Roads获取来自JSON响应的点。