微信小程序项目中使用了weui组件库，有按照官方指引：https://wechat-miniprogram.github.io/weui/docs/quickstart.html#%E4%BD%BF%E7%94%A8%E4%B9%8B%E5%89%8D
用 useExtendedLib 扩展库 方式引入，在界面使用时，样式不生效。求解。
相关问题
相关文档
- WeUI Component Library: Mini Program/Development/Extended/WeUI Component Library
- Introduction to the WeUI Component Library: Mini Program/Development/Extended/WeUI Component Library
- Background of the project: Mini Program/Development/Extended/WeUI Component Library
- Related document: Mini Program/Development/Extended/WeUI Component Library
- Online preview: Mini Program/Development/Extended/WeUI Component Library
请具体描述问题出现的流程，并提供能复现问题的简单代码片段（https://developers.weixin.qq.com/miniprogram/dev/devtools/minicode.html）。