Method loadPlayTime

js/ReadingSystem.js:674–679

* 加载播放进度

()

   * 加载播放进度
   */
  loadPlayTime() {
    const time = getPlayTime(this.state.bookPath, this.state.currentUnitIndex);
    if (time > 0) {
      this.state.savedPlayTime = time;
    }
  }

  /**
   * 加载保存的播放速度