fupin/components/form/form-footer/form-footer.wxml

<view-flex class="footer" justify="space-between" align="center">
  <view class="left" wx:if="{{hasId}}">
    <view-flex bind:tap="delData" data-id="{{hasId}}" justify="center" align="center">
      删除
    </view-flex>
  </view>
  <view class="right" style="width: {{hasId ? '400rpx' : '100%'}};">
    <view-flex bind:tap="saveData" data-id="{{hasId}}" justify="center" align="center">
      保存
    </view-flex>
  </view>
</view-flex>