Flex布局 - 比例分布

<view class="cu-bar bg-white margin-top solid-bottom">
<view class="action">
<text class="cuIcon-title text-blue"></text>比例布局
</view>
</view>
<view class="padding bg-white">
<view class="flex">
<view class="flex-sub bg-grey padding-sm margin-xs radius">1</view>
<view class="flex-sub bg-grey padding-sm margin-xs radius">1</view>
</view>
<view class="flex p-xs margin-bottom-sm mb-sm">
<view class="flex-sub bg-grey padding-sm margin-xs radius">1</view>
<view class="flex-twice bg-grey padding-sm margin-xs radius">2</view>
</view>
<view class="flex p-xs margin-bottom-sm mb-sm">
<view class="flex-sub bg-grey padding-sm margin-xs radius">1</view>
<view class="flex-twice bg-grey padding-sm margin-xs radius">2</view>
<view class="flex-treble bg-grey padding-sm margin-xs radius">3</view>
</view>
</view>