尝试更改包中指定的react-native版本。将json(在dependencies - react-native下)改为与错误消息中显示的“Native Version”相同。然后再次运行'npm install'。

I've never seen this error before, but whenever I can't get Xcode and React-Native to play well together, I do a couple of things. Check what version of Xcode I'm working with. If it needs to be updated, I update it. Then clearing watchman and the cache are the second place I go. I don't use the reset cache command. It always says that I need to verify the cache, so I skip that (you can do it though, I just get confused). I use rm -rf $TMPDIR/react-* to get rid of any cached builds. If that doesn't work, I try to build the app in Xcode, then work my way from there, to build it with react-native run-ios. With this error message, it seems you might start by trying to build it with Xcode. Hope that helps...let me know your progress with it. Good luck! (Also, you could update to RN 0.51 as another attempt to get your versions synced.)

在手动更新我的包后，我就遇到了这个问题。 从Expo Go应用程序中删除所有项目并运行Expo update自动为我解决了这个问题。

还要确保在模拟器中启用了wifi

我有同样的问题，而建立我的react原生应用程序的android和我做了以下工作。

错误控制台中“JavaScript版本0.50.1”是包中的react-native版本。json文件。确保它与错误控制台中“本机版本0.50.0”的版本相同。

我已经在错误控制台中按照提示将react-native版本更新为“Native version 0.50.0”。 重新构建应用react-native run-android。

在我的例子中，我手动更改了expo版本。我得到了同样的问题，因为我忘记更新app.json中的sdkVersion和package.json中的babel-preset-expo

然后运行:expo r -c清除缓存并启动应用程序。