// 向 info下面 每一项 插入 isShow

   test() {

       const _this = this;

       _this.info.isShow = false;

       let iteration = function(arr) {

         let newArr = [];

         if (arr != undefined && arr.length > 0) {

           newArr = arr.map(item => {

             item.isShow = false;

             if (item.children != undefined && item.children.length > 0) {

               iteration(item.children);

             }

             return item;

           });

         }

         return newArr;

       };

       _this.info.children = iteration(_this.info.children);

     },

 // 封装  点击得每个结点的id   和该结点的位置

 extendKey(json, nodeId, bol) {

       var arr = json.map(item => {

         if (item.id == nodeId) {

           item.isShow = bol;

         } else if (item.mate && item.mate.id == nodeId) {

           item.isShow = bol;

         } else {

           if (item.children) {

             this.extendKey(item.children, nodeId, bol);

           }

         }

         return item;

       });

       return arr;

     },