Method destroy

js/ReadingSystem.js:1142–1150

* 销毁系统，清理资源

()

   * 销毁系统，清理资源
   */
  destroy() {
    this.eventManager.clear();
    this.lrcCache.clear();
    this.audioPreload.clear();
    this.resourceLoader.cancel();
    this.lyricLineEls = [];
    this.dom = null;
    this.state = null;
  }
}