1.动态赋值

<div
    v-for="(item, index) in typeList"
    :key="item.id"
>
    <a-input
        v-if="inputSecondaryVisible && curSecondaryInputIndex === index"
        :ref="'input' + index"
        type="text"
        :value="inputSecondaryValue"
        @change="handleSecondaryInputChange"
    />
    <a-tag
        v-else
        @click="showSecondaryInput(index)"
     >
        <a-icon type="plus" /> 添 加
     </a-tag>
</div>

2.取值

showSecondaryInput(index) {
    this.curSecondaryInputIndex = index;
    this.inputSecondaryVisible = true;
    let inputRef = "secondaryInput" + index;//获取到当前input的ref
    this.$nextTick(function () {
        this.$refs[inputRef][0].focus();//通过ref对当前input获取焦点
    });
},

因为refs是一个数组，所以一定得加上[0]才能获取当前的ref。