Method getTopLeft

src/mapboxgl/overlay/MapvLayer.js:210–218

* @function MapvLayer.prototype.getTopLeft * @description 获取左上的坐标。

()

     * @description 获取左上的坐标。
     */
   getTopLeft() {
    var map = this.map;
    var topLeft;
    if (map) {
        var bounds = map.getBounds();
        topLeft = bounds.getNorthWest();
    }
    return topLeft;
}

  /**
  * @function MapvRenderer.prototype.bindEvent