<block wx:for="{{a}}" wx:for-item="item" >
   <view data-index="{{index}}">  
    <block wx:for="{{item.b}}" >
               <input type="text" bindfocus="index"  data-index="{{index}}">
       </block>
   <view>
</block>


input获得焦点的时候怎么获取上一层循环的index呢?


==================RE:======================
自己定义index和item
<block wx:for="{{a}}" wx:for-index="father_index" wx:for-item="father_item">


 <view data-index="{{father_index}}">


   <block wx:for="{{father_item}}" wx:for-index="son_index" wx:for-item="son_item">


     <input type="text" value="{{son_item.value+father_index+son_index}}" data-index="{{father_index}}" />


   </block>


 </view>


</block>






data: {


   a: [


     [{ value: "a" }, { value: "b" }, { value: "c" }],


     [{ value: "d" }, { value: "e" }, { value: "f" }],


     [{ value: "g" }, { value: "h" }, { value: "i" }]


   ]


 }