<div class="cartContent" :class="{'bg' : status == 2}" v-for="(val,key) in imgListData" :id="key">
<div class="choose">
![](../assets/img/radio-checked.png)
![](../assets/img/radio-nochecked.png)
</div>
.........
</div>

data(){
     return{
      responseData:[
        {'id':'1','name':'女装','price':115,'num':1,'pic':'../static/img/1.jpg'},
        {'id':'2','name':'男装','price':110,'num':1,'pic':'../static/img/2.jpg'},
        {'id':'3','name':'童装','price':118,'num':2,'pic':'../static/img/3.jpg'}
        ],
      imgListData:[]
     }
   },

created() {
    this.allDataList()
},
methods:{
    allDataList(){
      for(let val of this.responseData){
//       val.status=false;//写这个有问题
       this.$set(val,'status',false)//此处为重点
       this.imgListData.push(val)
      }
       console.log(this.imgListData)
}

 choose(index){
    if(this.imgListData[index].status){
     this.imgListData[index].status=false;
    }else{
     this.imgListData[index].status=true
    }
 },