classroom-music-activation/miniprogram/common-components/w-picker/index.wxml

<!-- components/w-picker/index.wxml -->
<van-popup round="{{true}}" lock-scroll="{{true}}" z-index="{{zIndex}}" show="{{innerShow}}" position="bottom" safe-area-inset-bottom="{{false}}" bind:close="onClose" bind:after-leave="onAfterLeave" bind:before-enter="onBeforeEnter">
  <!-- 单选择器 -->
  <van-picker wx:if="{{ !showAfterLeave && !isMulti && !isSearch }}" columns="{{ columns }}" visible-item-count="{{ visibleItemCount }}" item-height="{{ itemHeight }}" show-toolbar bind:cancel="onClose" default-index="{{ defaultIndex }}" bind:confirm="onSubmit" bind:change="onChange"></van-picker>
  <!-- 多选择器 -->
  <van-picker wx:if="{{ !showAfterLeave && isMulti  && !isSearch }}" columns="{{ columns }}" visible-item-count="{{ visibleItemCount }}" item-height="{{ itemHeight }}" show-toolbar bind:cancel="onClose" bind:confirm="onSubmit" bind:change="onChange"></van-picker>
</van-popup>