效果图如下：

 代码如下：

<template>
  <div>
    <div class="carNoBoxInput">
      <div style="padding: 6px;border: 2px solid #fff;border-radius: 6px;margin: 6px 3px 6px 6px;">
        <input class="inputBox" :value="licensePlateUnit[0]" @click="licensePlateDoor = true"/>
        <input class="inputBox" :value="licensePlateUnit[1]" @click="licensePlateDoor = true"/>
        <span class="dot"></span>
        <input class="inputBox" :value="licensePlateUnit[2]" @click="licensePlateDoor = true"/>
        <input class="inputBox" :value="licensePlateUnit[3]" @click="licensePlateDoor = true"/>
        <input class="inputBox" :value="licensePlateUnit[4]" @click="licensePlateDoor = true"/>
        <input class="inputBox" :value="licensePlateUnit[5]" @click="licensePlateDoor = true"/>
        <input class="inputBox" :value="licensePlateUnit[6]" @click="licensePlateDoor = true"/>
        <input v-if="7 === licensePlateUnit.length - 1" class="inputBox" :class="7 === licensePlateUnit.length - 1 ? 'inputBoxActive' : 'inputBox'" :value="licensePlateUnit[7]"/>
        <img v-if="7 !== licensePlateUnit.length - 1" src="../assets/newEnergy.png" style="height: 36px;width: 36px;"  alt="新能源"/>
      </div>
    </div>
    <div v-if="licensePlateDoor">
      <div v-if="licensePlateUnit.length < 1" class="carNoBox">
        <span class="carNo" v-for="item in columns" :key="item" @click="pickOn(item)">
          {{item}}
        </span>
        <span class="delBt" @click="delCarNo">X</span>
      </div>
      <div v-if="licensePlateUnit.length >= 1" class="carNoBox">
      <span class="carNo" v-for="item in numberColumns" :key="item" @click="pickOn(item)">
        {{item}}
      </span>
        <div style="display: flex;align-items: center">
          <span class="delBt" @click="delCarNo">X</span>
          <span class="delBt" style="margin-left: 6px;width: 42px" @click="confirm">确认</span>
        </div>
      </div>
    </div>
  </div>
</template>

<script>



export default {
  data() {
    return {
      licensePlateDoor: false,
      activeIndex: 0,
      licensePlateUnit: [],
      columns: [//省缩写选择
        '京', '沪', '鄂', '湘', '川', '渝', '粤', '闽', '晋', '黑',

        '津', '浙', '豫', '赣', '贵', '青', '琼', '宁', '吉', '蒙',

        '冀', '苏', '皖', '桂', '云', '陕', '甘', '藏', '新', '辽',
        '鲁'],
      numberColumns: ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0','Q', 'W', 'E',
        'R', 'T', 'Y', 'U', 'I', 'O', 'P', 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'Z',
        'X', 'C', 'V', 'B', 'N', 'M', '港','澳','学','领','警'
      ],
    }
  },
  methods: {
    pickOn(value) {
      this.licensePlateDoor = true;
      if (this.licensePlateUnit.length <= 7) {
        this.licensePlateUnit.push(value)
      }
    },
    delCarNo() {
      this.licensePlateUnit.pop();
    },
    confirm() {
      if(this.licensePlateUnit.length >= 7) {
        console.log("车牌是："+this.licensePlateUnit.join(''));
        this.licensePlateDoor = false;
      }
    },
  }
}
</script>


<style scoped>
  .carNo {
    border-radius: 6px;
    background: #fff;
    font-weight: bold;
    font-size: 20px;
    height: 28px;
    width:28px;
    margin: 6px;
    padding: 12px;
    cursor: pointer;
  }
  .inputBox {
    color: white;
    height: 30px;
    line-height: 30px;
    width: 30px;
    font-size: 28px;
    text-align: center;
    background-color: transparent;
    border: none;
    outline: none;
    caret-color: rgba(0, 0, 0, 0)
  }
  input:focus {
    border-bottom: 3px solid #fff;
    transition: all 0.5s;
  }
  .dot {
    margin-bottom: 6px;
    background-color: #fff;
    height: 6px;
    width: 6px;
    border-radius: 50%;
    display: inline-block
  }
  .delBt {
    background: #ACB3BB;
    border-radius: 6px;
    display: inline-block;
    font-weight: bold;
    font-size: 20px;
    height: 28px;
    width:28px;
    margin: 6px;
    padding: 12px;
    cursor: pointer;
  }
  .carNoBoxInput {
    display: flex;
    width: 310px;
    align-items: center;
    //height: 80px;
    border-radius: 8px;
    margin: 12px 0;
    background: #2D66D8;
  }
  .carNoBox {
    background: #D0D5D9;
    position: relative;
    width: 600px;
    border-radius: 6px;
    display: flex;
    flex-wrap: wrap;
    justify-items: center;
    align-items: center
  }
</style>