var winSize = cc.director.getWinSize();        //add main node        var mainNode = cc.Node.create();        var scale = winSize.height / 320;        mainNode.attr({anchorX: 0, anchorY: 0, scale: scale, x: (winSize.width - 480 * scale) / 2, y: (winSize.height - 320 * scale) / 2});        this.addChild(mainNode);        //read widget        var widget = ccs.uiReader.widgetFromJsonFile(res.ui_start);        mainNode.addChild(widget,-1);        //var widget = ccs.uiReader.widgetFromJsonFile(res.ui_start);        //this.addChild(widget,100); // 取得父节点        var a = widget.getChildByName("ImageView_50");// 取得父节点上的按钮        var left_button = a.getChildByName("Button_shengcun");        left_button.addTouchEventListener(this.onNewGame ,this);

新版本里的getChildByName函数已经不会遍历所有控件了，它仅仅会去当前控件下的子控件里去找，所以子控件的子控件就获取不到了