调用方法：Vue.set( target, key, value )
target：要更改的数据源(可以是对象或者数组)
key：要更改的具体数据
value ：重新赋的值
1 <!DOCTYPE html> 2 <html> 3 <head lang="en"> 4 <meta charset="UTF-8"> 5 <title></title> 6 </head> 7 <body> 8 <div id="app"> 10 <p v-for="(item,index)in list" :key="item.id" @click="btnClick(index,item.id)"> 11 {{item.message}} 12 </p> 15 </div> 16 17 <script src="../../dist/vue.min.js"></script> 18 <script> 19 var vm2=new Vue({ 20 el:"#app", 21 data:{ 22 list:[ 23 {message:"星星",id:"1"}, 24 {message:"太阳",id:"2"}, 25 {message:"月亮",id:"3"} 26 ] 27 }, 28 methods:{ 29 btnClick(index,id){ 30 this.$set(this.list,index,{message:"小猫",id:id}); 31 } 32 } 33 }); 34 </script> 35 </body> 36 </html>