picker-view如果切换显示为空白 - WXOPEN Club

使用picker-view时，如果hidden默认设置为true的话，切换为false就会显示空白。默认设置为false则切换正常。不论hidden设置在外层view还是直接设置在picker-view标签上，都会出现这种情况

<view><text bindtap="changeHidden">显示</text></view>

<view class="weui-footer weui-footer_fixed-bottom"" hidden="{{sel_hidden}}>

<picker-view indicator-style="height: 50px;" class="cal-num_model_sel" style="width: 100%; height: 450rpx;" value="{{formModel.value}}" bindchange="bindChange">

<picker-view-column>

<view wx:for="{{formModel.years}}" style="line-height: 50px">{{item}}年</view>

</picker-view-column>

<picker-view-column>

<view wx:for="{{formModel.months}}" style="line-height: 50px">{{item}}月</view>

</picker-view-column>

<picker-view-column>

<view wx:for="{{formModel.days}}" style="line-height: 50px">{{item}}日</view>

</picker-view-column>

</picker-view>

</view>

显示如下图：