Opene管理扫描/ android / app / build.gradle

试一试:

编译("com.facebook.react:react-native:0.51.0") {force = true}

而不是 编译"com.facebook.react:react-native:0.51.0" {force = true}

裁判:链接

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.)

我有这个问题很长一段时间了，上面的解决方案都没用。我在一个create-react-native-app项目中升级react native，直到我发现不是所有版本的Expo都支持最新的react native。

在文档中找到了这个页面的链接，其中显示了官方支持的React Native, React和Expo的版本组合:

来源:https://github.com/react-community/create-react-native-app/blob/master/VERSIONS.md

编辑app.json和包。Json文件来匹配相应的版本，运行NPM install可以让一切恢复正常。

对我来说，我不得不为react native打开多个node js终端，并且在运行应用程序到我的android设备之前忘记关闭。 我关闭终端，再次运行，它成功加载页面

这不是一个解决方案，但在我的情况下，我在我的设备上安装了多个RN应用程序，我不知情地试图从错误的应用程序中“重新加载”。(我正在同时开发两个应用程序)所以确保你在正确的应用程序!

还要确保在模拟器中启用了wifi