关于ccui.Button

Cocos2d-x JavaScript
#1

var WelcomeLayer = cc.Layer.extend({
ctor: function () {
this._super();
this.welcomeInit();
},

welcomeInit: function () {
    var bg = new cc.LayerColor(cc.color(124, 254, 246, 255));
    this.addChild(bg);

    var label_title = new cc.LabelTTF("HELLO", 24);
    label_title.setColor(cc.color.YELLOW);
    label_title.setPosition(cc.p(160, 240));
    this.addChild(label_title, 10);

    var btn_go = new ccui.Button();
    btn_go.setTitleText("点击进入游戏");
    btn_go.setTitleColor(cc.color.BLACK);
    btn_go.setTouchEnabled(true);
    btn_go.setTitleFontSize(30);
    btn_go.setPosition(cc.p(500, 240));
    //btn_go.setPosition(cc.pSub(label_title.getPosition(), cc.p(0, label_title.getContentSize().height)));
    this.addChild(btn_go);
    //btn_go.addTouchEventListener(on_Click, this);

    btn_go.addTouchEventListener(function (sender, type) {
        cc.log("2");
        if (type == ccui.Widget.TOUCH_ENDED) {
            cc.log("1");
        }
    }, this);
},

});

var WelcomeScene = cc.Scene.extend({
onEnter: function () {
var layer = new WelcomeLayer();
this.addChild(layer);
}
});

我想问下，我之前写addTouchEventListener这个方法的时候好用，怎么现在log打不出来了啊，纠结很久了，没找到问题，能帮帮忙么