Method getMapState

src/mapboxgl/overlay/GraphicLayer.js:212–239

* @function GraphicLayer.prototype.getMapState * @description 获取当前地图状态。 * @returns {Object} 地图状态，包含地图状态信息。

()

      * @returns {Object} 地图状态，包含地图状态信息。
      */
     getMapState() {
        let state = {};
        let center = this.map.getCenter();
        let longitude = center.lng;
        let latitude = center.lat;
        let zoom = this.map.getZoom();
        let maxZoom = this.map.getMaxZoom();
        let pitch = this.map.getPitch();
        let bearing = this.map.getBearing();

        let mapViewport = {
            longitude: longitude,
            latitude: latitude,
            zoom: zoom,
            maxZoom: maxZoom,
            pitch: pitch,
            bearing: bearing
        };
        for (let key in mapViewport) {
            state[key] = mapViewport[key];
        }
        //当使用扩展的mapboxgl代码时有效
        if (this.map.getCRS && this.map.getCRS() !== mapboxgl.CRS.EPSG3857) {
            state.coordinateSystem = this.coordinateSystem;
            state.isGeographicCoordinateSystem = this.isGeographicCoordinateSystem;
        }
         return state;
     }
 }