Method addGraphics

src/openlayers/overlay/Graphic.js:285–290

* @function Graphic.prototype.addGraphics * @description 追加点要素，不会覆盖之前的要素。 * @param {Array. } graphics - 点要素对象数组。

(graphics)

     * @param {Array.<OverlayGraphic>}  graphics - 点要素对象数组。
     */
    addGraphics(graphics) {
        this.graphics = this.graphics || [];
        let sGraphics = !Util.isArray(graphics) ? [graphics] : [].concat(graphics);
        this.graphics = this.graphics.concat(sGraphics);
        this.update();
    }

    /**
     * @function Graphic.prototype.getGraphicBy