[图片] WXML：  <block wx:for="{{cateItems[curIndex].children}}" wx:key="{{index}}">           <view style="position:relative">             <view class="nav_right_items">               <text>{{item.name}}</text>               <text style="color:red">￥{{item.price}}/斤</text>             </view>             <view class="counts">               <text class="reduce {{status}}" bindtap="reduce" data-index="{{index}}">-</text>               <input class="number" value="{{item.num}}" data-index="{{index}}" bindinput="bindValue"></input>               <text class="add" bindtap="add" data-index="{{index}}">+</text>             </view>           </view>         </block> JS： data: {     arr: ["蔬菜","调味品","米类","面类","油类","干果类","水产类","肉类","杂粮类","冻货类","酒水类","芽菜类","烫菜类"],     index: 1,     currentTab: 0,     cateItems:[         {           cate_id:1,           cate_name:'根茎类',           children: [             {                child_id: 1,                name: '（皱皮）辣椒',               price: 6,               num:0             },              {                child_id: 2,                name: '黄皮洋葱',               price: 1.5,               num:0             },             {                child_id: 3,                name: '苦菊',               price: 3.5,               num:0              },             {                child_id: 4,                name: '蛋皮',               price: 6,               num:0             }           ]         },               curNav:1,       curIndex:0,       stasus:"disabled"   }, add:function(e){     let index = e.currentTarget.dataset.index;     var curIndex = this.data.curIndex;     var children = this.data.cateItems[curIndex].children[index];     console.log(children)     var num = children.num;     var status = num<1?"disabled":"normal";     num = num + 1;     console.log(num)     children.num = num;     this.setData({       num:num,       status:status     })     console.log(children)     console.log(num)   }, 我this.setData里面写的不对吗