iboss_wx_app/components/dkbase/dk-select-field/dk-select-field.wxml

<view>
  <van-field required="{{required}}" autosize border="{{ border }}" readonly="{{ false }}" id="vanField"
    label="{{label}}" placeholder="{{placeholder}}" input-class="{{inputClass}}" readonly="{{readonly}}" errorMessage="{{errorMessage}}" label-class="{{labelClass}}" value="{{fieldValue}}" extra-event-params="{{true}}" bind:input="inputField" bind:blur="blurField">
    <view slot="right-icon" catchtap="open">
      <van-icon slot="right-icon" name="{{iconUrl}}" color="#c8c9cc;" size="20px"></van-icon>
    </view>
  </van-field>

  <van-transition
    show="{{ selectListShow && selectList.length !== 0}}"
    name="fade-down"
    duration="{{ { enter: 300, leave: 1000 } }}"
    enter-class="van-enter-class"
    enter-active-class="van-enter-active-class"
    leave-active-class="van-leave-active-class"
    leave-to-class="van-leave-to-class"
  >
  <view style="position: relative;width: 100%;height: auto;top: 5px;">
    <view class="select-list">
      <view class="select-list-item">
        <van-cell-group style="max-height: 400rpx;">
          <van-cell size="large" wx:for="{{selectList}}" data-key="{{item.code}}" data-item="{{item}}" data-index="{{indext}}" title="{{item.supName}}" bind:tap="clickCell"/>
        </van-cell-group>
      </view>
    </view>
  </view>
  </van-transition>

</view>