index.wxml
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<import src="./toolbar.wxml" />
<view class="van-picker custom-class">
<template is="toolbar" wx:if="{{ toolbarPosition === 'top' }}" data="{{ showToolbar, cancelButtonText, title, confirmButtonText }}"></template>
<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="{{ isSimple(columns) ? [columns] : columns }}"
wx:key="index"
data-index="{{ index }}"
custom-class="column-class"
value-key="{{ valueKey }}"
initial-options="{{ isSimple(columns) ? item : 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="background-size: 100% {{ (itemHeight * visibleItemCount - itemHeight) / 2 }}px" />
<view
class="van-picker__frame van-hairline--top-bottom"
style="height: {{ itemHeight }}px"
/>
</view>
<template is="toolbar" wx:if="{{ toolbarPosition === 'bottom' }}" data="{{ showToolbar, cancelButtonText, title, confirmButtonText }}"></template>
</view>
<wxs module="isSimple">
function isSimple(columns) {
return columns.length && !columns[0].values;
}
module.exports = isSimple;
</wxs>