vant的DatetimePicker 和 Popup结合使用

效果图

<van-popup v-model="show" position="center" :overlay="true" transition="0s easing">
     <div class='picker_box'>
         <p class='set'>设置店铺折扣率</p>
         <div class='num'>
             <span class='shi'>{{shi}}</span>
             <span>.</span>
             <span class='ge'>{{ge}}</span> 
             <span>折</span>   
         </div>
         <van-picker :columns="columns" :visible-item-count=3   @cancel="onCancel" @confirm="onConfirm" @change="onChange"   />
     </div>
 </van-popup>
 //在script里首先定义一个对象数组
 const citys = {
	  '1': ['0','1','2','3','4','5','6','7','8','9'],
	  '2': ['2'],
	  '3': ['3'],
	  '4': ['4'],
	  '5': ['5'],
	  '6': ['6'],
	  '7': ['7'],
	  '8': ['8'],
	  '9': ['9'],
};
//data里
columns: [
        {
          values: Object.keys(citys),
          className: 'column1'
        },
        {
          values: citys['1'],
          className: 'column2'
        }
      ],
//methods里面  ，显示遮罩层
	xian(){
        this.show=true;
    },