     
     func getNewsWithId(newsId : String!) {
         activityIndicatorView.startAnimation()
+        self.isLoading = true
         //获取新闻详情
         viewModel.loadNewsDetail(newsId, complate: { (newsDetail) -> Void in
             if let img = newsDetail.image {

    /// 判断是否有图
    var hasPic : Bool = false
    /// 是否正在加载
    var isLoading : Bool = true
    /// 是否有下一条
    var hasNext : Bool = false
    /// 是否有上一条

            if !viewModel.hasNext {
                return
            }
            if self.isLoading {
                return
            }
            self.isLoading = true
            getNextNews()
        }
    }

