van-picker中columns绑定数组对象的用法-van-

参考链接：https://www.zhihu.com/question/509169405/answer/2292170011

 <!-- 案件来源 -->
        <van-field readonly clickable v-model="form.caseFromName" name="picker" label="案件来源" placeholder="请选择" @click="caseFromCodeShow = true" required :rules="[{ required: true, message: '请选择' }]" />
        <van-popup v-model="caseFromCodeShow" position="bottom">
          <van-picker value-key="label" show-toolbar :columns="caseFromColumns" @confirm="caseFromonConfirm" @cancel="caseFromCodeShow = false" />
        </van-popup>

caseFromColumns: [
        { label: '巡逻发现', value: '0' },
        { label: '投诉举报', value: '1' },
        { label: '重大舆情', value: '2' },
        { label: '专项巡查任务', value: '3' }
      ],

   // 案件来源点击确定
   caseFromonConfirm(e) {
     this.form.caseFromName = e.label
     this.form.caseFromCode = e.value
     this.caseFromCodeShow = false
   },`