text: cc.Class({
    extends: cc.Component,
  
    properties: {
      menuAudio: {
        default: null,
        type: cc.AudioClip
      }
    },
  
    onLoad() {
      this.node.on('touchend', this.on_touch_ended, this);
    },
  
    on_touch_ended() {
      // 播放音效
      cc.audioEngine.playEffect(this.menuAudio, false);
      cc.tween(this.node).
      to(.2, {
        scale: 1.2
      }, {
        easing: 'quadIn'
      }).
      to(.2, {
        scale: 1
      }, {
        easing: 'quadIn'
      }).
      call(() => {
        cc.director.loadScene("about");
      }).start()
    },
  });
  