cocos2d-js，用schedule刷新时间

this.schedule是cc.Node的内置函数。

实现起来非常简单：

var GameLayer = cc.Layer.extend({
  onEnter: function() {
    var timelb = cc.LabelTTF.create( new Date().toLocaleString(), "宋体", 18, cc.size(180, 180), cc.TEXT_ALIGNMENT_LEFT);
     timelb.x = 100;
     timelb.y = 80;
     timelb.color = cc.color(255, 0, 0);
     this.addChild(timelb,10);
     this.schedule(function(){
           timelb.setString(new Date().toLocaleString());
      }, 1);   //1秒更新一次
  }
};)