第四个示例简易电梯导航用iphoneX扫码浏览导航条的内容没有正常显示

[etoseto]

https://weex.apache.org/zh/docs/components/scroller.html#%E7%A4%BA%E4%BE%8B
需要为class为 elevator 的样式中添加 flex-direction: row;

[YorkShen]

Thanks.

Could you please create a PR for us, I'm really appreciated your contribution for Weex.