我试图关注下一个动态插入的输入，我可以关注foobar_x，而不关注v-for循环中的输入。任何帮助，将不胜感激。
此处的Codepen：https：//codepen.io/Moloth/pen/qPRGvz
new Vue({
el: '#app',
data: {
test: "xxxxxx",
phones: [
{number: "0000000"},
{number: "1111111"},
],
},
methods: {
focusPhones: function() {
this.$refs.foobar_1.focus()
},
focusTest: function() {
this.$refs.foobar_x.focus()
}
}
})<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script src="https://unpkg.com/vuetify/dist/vuetify.js"></script>
<div id="app">
<v-text-field label="foobar_x" ref="foobar_x" v-model="test"></v-text-field>
<div v-for="(value, i) in phones" :key="i">
<v-text-field :label="'foobar_'+i" :ref="'foobar_'+i" v-model="phones[i].number"></v-text-field>
</div>
<v-btn @click.native="focusPhones()">Focus foobar_1</v-btn>
<v-btn @click.native="focusTest()">Focus foobar_x</v-btn>
</div>