uniapp中picker只选择月和日demo效果（整理）

<template>
  <view style="margin-top: 200rpx;">
    <!-- mode="multiSelector" 多列选择器 -->
    <view>
      <picker :range="years" :value="echoVal" @change="yearChange" mode="multiSelector">
        {{ years[0][yearsIndex1] }}-{{ years[1][yearsIndex2] }}
      </picker>
    </view>
  </view>
  </view>
</template>
<script>
  export default {
    data() {
      return {
        years: [],
        yearsIndex1: 0,
        yearsIndex2: 0,
        echoVal: [], //当前日期回显
      }
    },
    // 页面加载
    onLoad(e) {
      var date = new Date();
      var year = date.getFullYear(); //获取完整的年份(4位)
      var month = date.getMonth() + 1; //获取当前月份(0-11,0代表1月)
      var nowDay = date.getDate(); //获取当前日(1-31)
      var d = new Date(year, month, 0);
      var day = d.getDate(); //获取一个月多少天
      console.log(month, date.getDate());
      this.yearsIndex1 = month - 1;
      this.yearsIndex2 = nowDay - 1;
      var list = [];
      for (var i = 0; i < day; i++) {
        var aa = i + 1;
        if (aa < 9) {
          aa = '0' + aa
        } else {
          aa = "" + aa
        }
        list.push(aa)
      }
      var arr = ['01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12'];
      this.years.push(arr);
      this.years.push(list);
      this.echoVal.push(month - 1);
      this.echoVal.push(nowDay - 1);
    },
    methods: {
      yearChange: function(e) {
        console.log(e)
        //获得对象的 detail的 value
        //通过数组的下标改变显示在页面的值
        this.yearsIndex1 = e.detail.value[0];
        this.yearsIndex2 = e.detail.value[1];
      }
    }
  }
</script>
<style>
</style>