vue实现移动端H5数字键盘组件

我们平时扫码付款的时候，经常会输入一些数字进行付款，仔细看了下键盘和系统的键盘有点不一样，于是今天买甘蔗的时候扫码付款就想了一下要怎么去实现一个。话不多说，直接上代码。

结果如下：

代码如下：

<template>
  <div class="keyboard-wrapper">
    <input type="text" v-model="NUM" @focus="show = true" οnfοcus="this.blur()"/>
    <div class="keyboard" v-if="show">
      <div class="num">
        <table>
          <tr>
            <td @click="change(1)" :class="[active === 1 ? 'active' : '']" @touchstart="msDown(1)" @touchend="msUp(1)">1</td>
            <td @click="change(2)" :class="[active === 2 ? 'active' : '']" @touchstart="msDown(2)" @touchend="msUp(2)">2</td>
            <td @click="change(3)" :class="[active === 3 ? 'active' : '']" @touchstart="msDown(3)" @touchend="msUp(3)">3</td>
            <td rowspan="2" class="del" @click="del">×</td>
          </tr>
          <tr>
            <td @click="change(4)" :class="[active === 4 ? 'active' : '']" @touchstart="msDown(4)" @touchend="msUp(4)">4</td>
            <td @click="change(5)" :class="[active === 5 ? 'active' : '']" @touchstart="msDown(5)" @touchend="msUp(5)">5</td>
            <td @click="change(6)" :class="[active === 6 ? 'active' : '']" @touchstart="msDown(6)" @touchend="msUp(6)">6</td>
          </tr>
          <tr>
            <td @click="change(7)" :class="[active === 7 ? 'active' : '']" @touchstart="msDown(7)" @touchend="msUp(7)">7</td>
            <td @click="change(8)" :class="[active === 8 ? 'active' : '']" @touchstart="msDown(8)" @touchend="msUp(8)">8</td>
            <td @click="change(9)" :class="[active === 9 ? 'active' : '']" @touchstart="msDown(9)" @touchend="msUp(9)">9</td>
            <td rowspan="2" class="comfirm" @click="comfirm">确定</td>
          </tr>
          <tr>
            <td colspan="2" @click="change(0)" :class="[active === 0 ? 'active' : '']" @touchstart="msDown(0)" @touchend="msUp(0)">0</td>
            <td colspan="1" @click="change('.')" :class="[active === '.' ? 'active' : '']" @touchstart="msDown('.')" @touchend="msUp('.')">.</td>
          </tr>
        </table>
      </div>
    </div>
  </div>
</template>

<script>

export default {
  name: 'App',
  data () {
    return {
      active: null,
      show: false,
      NUM: '',
      result: []
    };
  },
  computed: {
    // 统计打中的地鼠数量
    num: function () {
      return this.result.join('');
    }
  },
  created () {
  },
  mounted () {
  },
  methods: {
    msDown (v) {
      this.active = v;
    },
    msUp (v) {
      this.active = '';
    },
    stopInput () {
      return false;
    },
    change (val, $event) {
      if (this.result.length === 0 && val === '.') {
        return false;
      } else {
        this.result.push(val);
        this.NUM = this.result.join('');
      }
    },
    del () {
      this.result.pop();
      this.NUM = this.result.join('');
      this.$emit('del', this.NUM);
    },
    comfirm () {
      this.$emit('comfirm', this.NUM);
      this.show = false;
    }
  }
};
</script>
<style lang="less" scoped>
.keyboard-wrapper {
  user-select: none;
  input {
    width:100%;
    height:50px;
    font-size:25px;
  }
  .keyboard {
    position: fixed;
    bottom: 0;
    width: 100%;
    .num {
      table {
        width: 100%;
        border: 1px solid #ccc;
        border-collapse: collapse;
        background: #fff;
        td {
          height: 50px;
          vertical-align: middle;
          color: #333;
          font-size: 20px;
          border: 1px solid #ccc;
          text-align: center;
        }
        td.active{
          background:#ccc;
        }
        .del {
          background: #eee;
        }
        .comfirm {
          font-size: 16px;
          width: 80px;
          background: #118eeb;
          color: #fff;
        }
      }
    }
  }
}
</style>