data里
isActive:-1,
method里
checkedItem(index){
this.isActive=index;
},
页面里
<div v-for="(item,index) in nameoptions" v-bind:class="{active:index==isActive}" @click="checkItem(index)>{{item.name}}</div>
原文：http://www.cnblogs.com/thinkingthigh/p/7603867.html