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miniprogram_npm/@vant/weapp/picker/index.wxml

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+<wxs src="./index.wxs" module="computed" />
+
+<view class="van-picker custom-class">
+  <include wx:if="{{ toolbarPosition === 'top' }}" src="./toolbar.wxml" />
+
+  <view wx:if="{{ loading }}" class="van-picker__loading">
+    <loading color="#1989fa"/>
+  </view>
+
+  <view
+    class="van-picker__columns"
+    style="{{ computed.columnsStyle({ itemHeight, visibleItemCount }) }}"
+    catch:touchmove="noop"
+  >
+    <picker-column
+      class="van-picker__column"
+      wx:for="{{ computed.columns(columns) }}"
+      wx:key="index"
+      data-index="{{ index }}"
+      custom-class="column-class"
+      value-key="{{ valueKey }}"
+      initial-options="{{ item.values }}"
+      default-index="{{ item.defaultIndex || defaultIndex }}"
+      item-height="{{ itemHeight }}"
+      visible-item-count="{{ visibleItemCount }}"
+      active-class="active-class"
+      bind:change="onChange"
+    />
+    <view class="van-picker__mask" style="{{ computed.maskStyle({ itemHeight, visibleItemCount }) }}" />
+    <view
+      class="van-picker__frame van-hairline--top-bottom"
+      style="{{ computed.frameStyle({ itemHeight }) }}"
+    />
+  </view>
+
+  <include wx:if="{{ toolbarPosition === 'bottom' }}" src="./toolbar.wxml" />
+</view>