Flex布局 - 固定尺寸

<view class="cu-bar bg-white solid-bottom margin-top">
<view class="action">
<text class="cuIcon-title text-blue"></text>固定尺寸
</view>
</view>
<view class="padding bg-white">
<view class="flex flex-wrap">
<view class="basis-xs bg-grey margin-xs padding-sm radius">xs(20%)</view>
<view class="basis-df"></view>
<view class="basis-sm bg-grey margin-xs padding-sm radius">sm(40%)</view>
<view class="basis-df"></view>
<view class="basis-df bg-grey margin-xs padding-sm radius">sub(50%)</view>
<view class="basis-lg bg-grey margin-xs padding-sm radius">lg(60%)</view>
<view class="basis-xl bg-grey margin-xs padding-sm radius">xl(80%)</view>
</view>
</view>