Question

我刚刚更新到Xcode 12，现在我的react native项目（在更新之前正在运行）将无法运行并输出此错误

An error was encountered processing the command (domain=NSPOSIXErrorDomain, code=2):
Failed to install the requested application
An application bundle was not found at the provided path.
Provide a valid path to the desired application bundle.
info Launching "app.lfgo.release"
error Failed to launch the app on simulator, An error was encountered processing the command (domain=FBSOpenApplicationServiceErrorDomain, code=4):
The request to open "app.lfgo.release" failed.
Underlying error (domain=FBSOpenApplicationErrorDomain, code=4):
    The operation couldn’t be completed. Application info provider (FBSApplicationLibrary) returned nil for "app.lfgo.release"
    Application info provider (FBSApplicationLibrary) returned nil for "app.lfgo.release"

Answer 1

升级到Xcode 12时，我也遇到了同样的事情。帮助（如果使用了锁定文件）将@ react-native-community / cli-platform-ios安装为所有@react-native-community/cli-platform-ios中的devDep和凹凸版本yarn.lock文件中的条目添加到4.13.0

Answer 2

不知道为什么要为我修复它或其他相关问题，但是...

使用npx react-native run-ios对我抛出此错误，但是当我通过xcode构建时，它工作正常。对我来说没有任何意义，但哦，好吧...

更新到Xcode 12后无法在模拟器上运行React Native Project

2 个答案: