如何像下方排版那样显示，一排三个
<block wx:for="{{indexdb}}" wx:for-index="idx" wx:for-item="list" > <view class="weui-flex" > <view class="weui-flex__item" wx:for="{{3}}"> <view class="weui-flex__item center" > <view bindtap="kantie" data-id="{{list._id}}" class="placeholder">{{list.name}}{{idx}} view> view> view> view> block> <view class="weui-flex center hang"> <view class="weui-flex__item"><view class="placeholder">1id0 view> view> <view class="weui-flex__item"><view class="placeholder">2idapp1 view> view> <view class="weui-flex__item"><view class="placeholder">3id2 view> view> view><view class="weui-flex center hang"> <view class="weui-flex__item"><view class="placeholder">4id3app view> view> <view class="weui-flex__item"><view class="placeholder"> view> view> <view class="weui-flex__item"><view class="placeholder"> view> view> view>
给样式加上纵向排列：
display: flex;
flex-direction: column;
横向排列：
display: flex;
flex-direction: row;