使用react中遇到的问题

引入antdesign中Carousel走马灯时遇到问题？

Uncaught Error: Element ref was specified as a string (slick) but no owner was set. You may have multiple copies of React loaded. (details: https://fb.me/react-refs-must-have-owner).
    at invariant (invariant.js:42)
    at coerceRef (react-dom.development.js:6736)
    at reconcileSingleElement (react-dom.development.js:7553)
    at reconcileChildFibers (react-dom.development.js:7656)
    at reconcileChildrenAtExpirationTime (react-dom.development.js:7780)
    at reconcileChildren (react-dom.development.js:7771)
    at updateHostComponent (react-dom.development.js:8024)
    at beginWork (react-dom.development.js:8257)
    at performUnitOfWork (react-dom.development.js:10244)
    at workLoop (react-dom.development.js:10308) ...

 问题出在npm 引用了两个react版本，参考官网：https://facebook.github.io/react/warnings/refs-must-have-owner.html 
使用命令 npm ls react(如果你使用cnpm，注意查看) 发现有两个版本，这里将原有的node_modules删除后重新npm install （或cnpm install）安装依赖就好了。