appointment-mp/dist/picker/index.wxml

<view class="van-picker custom-class">
  <view
    wx:if="{{ showToolbar }}"
    class="van-picker__toolbar van-hairline--top-bottom toolbar-class"
  >
    <view class="van-picker__cancel" data-type="cancel" bindtap="emit">
      {{ cancelButtonText || '取消' }}
    </view>
    <view wx:if="{{ title }}" class="van-picker__title van-ellipsis">{{ title }}</view>
    <view class="van-picker__confirm" data-type="confirm" bindtap="emit">
      {{ confirmButtonText || '确认' }}
    </view>
  </view>
  <view wx:if="{{ loading }}" class="van-picker__loading">
    <loading color="#1989fa"/>
  </view>
  <view
    class="van-picker__columns"
    style="height: {{ itemHeight * visibleItemCount }}px"
    catch:touchmove="noop"
  >
    <picker-column
      class="van-picker__column"
      wx:for="{{ simple ? [columns] : columns }}"
      wx:key="index"
      data-index="{{ index }}"
      custom-class="column-class"
      value-key="{{ valueKey }}"
      initial-options="{{ simple ? item : item.values }}"
      default-index="{{ item.defaultIndex }}"
      item-height="{{ itemHeight }}"
      visible-item-count="{{ visibleItemCount }}"
      active-class="active-class"
      bind:change="onChange"
    />
    <view
      class="van-picker__frame van-hairline--top-bottom"
      style="height: {{ itemHeight }}px"
    />
  </view>
</view>