cocos creator 按钮缩放加音频效果JS组件代码

cc.Class({
    extends: cc.Component,

    properties: {
        pressedScale: 1,
        transDuration: 0,
        
         buttonAudio: {
            default: null,
            url: cc.AudioClip
        }
    },

    // use this for initialization
    onLoad: function () {
        var self = this;
      /*  var audioMng = cc.find('Menu/AudioMng') || cc.find('Game/AudioMng')
        if (audioMng) {
            audioMng = audioMng.getComponent('AudioMng');
        }*/
        self.initScale = this.node.scale;
        self.button = self.getComponent(cc.Button);
        self.scaleDownAction = cc.scaleTo(self.transDuration, self.pressedScale);
        self.scaleUpAction = cc.scaleTo(self.transDuration, self.initScale);
        
        function onTouchDown (event) {
            this.stopAllActions();
          /*  if (audioMng) audioMng.playButton();*/
          cc.audioEngine.play(self.buttonAudio, false, 1);

            this.runAction(self.scaleDownAction);
        }
        function onTouchUp (event) {
            this.stopAllActions();
            this.runAction(self.scaleUpAction);
        }
        
        this.node.on('touchstart', onTouchDown, this.node);
        this.node.on('touchend', onTouchUp, this.node);
        this.node.on('touchcancel', onTouchUp, this.node);
    }
});