Method addMVTMapLayer

src/openlayers/mapping/WebMap.js:846–875

* @private * @function WebMap.prototype.addMVTMapLayer * @description 添加地图服务mapboxstyle图层 * @param {Object} mapInfo - 地图信息 * @param {Object} layerInfo - mapboxstyle图层信息

(mapInfo, layerInfo, zIndex)

   * @param {Object} layerInfo - mapboxstyle图层信息
   */
  addMVTMapLayer(mapInfo, layerInfo, zIndex) {
    layerInfo.zIndex = zIndex;
    // 获取地图详细信息
    return this.getMapboxStyleLayerInfo(mapInfo, layerInfo)
      .then((msLayerInfo) => {
        // 创建图层
        return this.createMVTLayer(msLayerInfo).then((layer) => {
          let layerID = Util.newGuid(8);
          if (layerInfo.name) {
            layer.setProperties({
              name: layerInfo.name,
              layerID: layerID,
              layerType: 'VECTOR_TILE'
            });
          }
          // 后续逻辑非需要visibleScales  否则修改很复杂
          layerInfo.visibleScales = layer.getSource().getTileGrid().getResolutions().map((res) => {
            return Util.resolutionToScale(res, 96, layerInfo.coordUnit || 'm');
          });
          //否则没有ID，对不上号
          layerInfo.layer = layer;
          layerInfo.layerID = layerID;

          this.map.addLayer(layer);
        });
      })
      .catch(function (error) {
        throw error;
      });
  }
  /**
   * @private
   * @function WebMap.prototype.createView