vue动态生成dom并且自动绑定事件

<div id="app">
<table v-for="table in tables">
  <tr v-for="row in table.row">
    <td style="width:80px;float:left" v-for="item in row">
      <input type="text" v-model="item.val" style="width:40px">
      <div style="width:40px;float:left">{{item.val}}</div>
    </td>
  </tr>
</table>
<button v-on:click="add">添加2x2的表格</button>
</div>

<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script type="text/javascript">
    var vm = new Vue({
   el : "#app",
   data:{
    tables : []
   },
   methods:{
      add:function(){
      row = [];
      rmax = 2;
      cmax = 2;
       for( i = 0; i < rmax; i++){
        column = [];
        for( f = 0; f < cmax; f++){
          column = column.concat({

              val:"",

          });
        }
        row.push(column);
      }
       this.tables.push({
        row:row,
      });
    }
  }
   });
</script>