      - parameter errorCallBack:   errorCallBack description
      */
     func getData (successCallBack : ViewModelSuccessCallBack?, errorCallBack : VieModelErrorCallBack?) {
-        self.successCallBack = successCallBack
-        self.errorCallBack = errorCallBack
         ZFNetworkTool.get(LATEST_NEWS_URL, params: nil, success: { (json) -> Void in
             
             let allNews : ZFLatestNews = ZFLatestNews(object: json)

            let stories1 = allNews.stories
            
            // 回调给controller
            if self.successCallBack != nil {
                self.successCallBack!(dataSoure:stories1!, headerSource:topStories!)
            }
            }) { (error) -> Void in
                
        }
    }
    /**
     获取往日的新闻
     

        dateFormat.dateFormat = "yyyyMMdd"
        let dateStr : String =  dateFormat.stringFromDate(date)
        
        //若果需要查询 11 月 18 日的消息，before 后的数字应为 20131119
        ZFNetworkTool.get(BEFORE_NEWS + dateStr, params: nil, success: { (json) -> Void in
            
