说明：vue使用时，当突然断网或其他原因造成数据加载错误时，axios方式的catch处理；

//取出内容； 
getItems:function(kid){
     var that = this;
     that.action='default';
     that.loading = true;
     that.finished = false;
     that.isfisrsload=false;
     that.tabitems=[];
     axios.get(allApi.itemsList,
          {params: {cat_id: kid,action:'type'},
           headers:{token:token,id:manage_id}})
     .then(function (res) {
          that.loading = false;
          that.finished = true;
          if (res.data.code == 0) {
            that.tabitems = res.data.data;
            that.action='items';
            if(that.tabitems.length<=0){
                        that.isfisrsload=true;
            } 
          }
      }).catch(function (res) {
          that.loading = false;
          that.finished = true;
          that.tabitems =[];
          if(that.tabitems.length<=0){
             that.isfisrsload=true;
          }
     });
},