MD_YOSwechat/components/My_datePicker/index.wxml

<view class="picker">
    <picker-view indicator-class="indicator" style="width: 100%; height: 300px;" value="{{value}}" bindchange="pickerChange">
        <picker-view-column style="width: 100%; text-align: center;">
            <view wx:for="{{years}}" style="line-height: 90rpx">{{item}}年</view>
        </picker-view-column>
        <picker-view-column style="width: 100%; text-align: center;">
            <view wx:for="{{months}}" style="line-height: 90rpx">{{item}}月</view>
        </picker-view-column>
        <picker-view-column style="width: 100%; text-align: center;">
            <view wx:for="{{days}}" style="line-height: 90rpx">{{item}}日</view>
        </picker-view-column>
    </picker-view>
</view>