uniapp微信小程序遮罩层u-popup禁止底层穿透

• 添加 @touchmove.prevent，遮罩层底部的页面就不会滑动了
• 微信开发者工具不生效，真机生效

<u-popup :show="showEwm" @close="closeEwm" mode="center" @touchmove.prevent>
  <view class="ewmshow">
    ················
  </view>
</u-popup>