removeChild后无法再加事件
const element = this._mapItemList[index].node;
element.parent.removeChild(element);
element.active = false;
this.previewScrollView.content.addChild(item);
item.active = true;
item.on(cc.Node.EventType.TOUCH_END, this.onMapItemClick, this);
后续添加的点击事件,会无法触发

