代码：

<picker-view  indicator-style="height: 50px;" style="width: 100%; height: 200px;" value="{{value}}" bindchange="bindChange">
  <picker-view-column >
    <view wx:for="{{years}}" wx:key="index" style="line-height: 50px">{{item}}年</view>
  </picker-view-column>
  <picker-view-column >
    <view wx:for="{{months}}"  wx:key="index" style="line-height: 50px">{{item}}月</view>
  </picker-view-column>
  <picker-view-column >
    <view wx:for="{{days}}"  wx:key="index" style="line-height: 50px">{{item}}日</view>
  </picker-view-column>
</picker-view>