React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: object.

React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: object._第1张图片
typeinvalid.png

版本信息:
"react": "16.0.0-alpha.12",
"react-native": "0.46.4",
"react-navigation": "^1.0.0-beta.11"
node:8.0.0
npm:5.0.1

这是版本问题最后无奈只能降低版本。
如果是已经在项目中用了react-navigation那么升级后是没有这个问题的。
如果是新建项目然后使用react-navigation那就会有这个问题。
然后将新项目降级到0.44 删除node_module 使用npm i. 运行还是会报错。
再次删除node_module
运行yarn install.
一切OK。

降级后的版本:
"react": "16.0.0-alpha.6",
"react-native": "^0.44.0",
"react-navigation": "^1.0.0-beta.11"

issue:
https://github.com/react-community/react-navigation/issues/2197
https://github.com/react-community/react-navigation/issues/2177
https://segmentfault.com/q/1010000010286008

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