React-native iOS 构建失败

React-native iOS build is failed

react-native iOS 构建失败并出现以下错误。

GB-MAC-01s-MacBook-Pro:rrtest muruganandham.kuppan$ react-native run-ios
Found Xcode project rrtest.xcodeproj
Building using "xcodebuild -project rrtest.xcodeproj -configuration Debug -scheme rrtest -destination id=E7283C81-5F0D-4732-BF8B-19DB3C904DA2 -derivedDataPath build"
Ignoring unf_ext-0.0.7.5 because its extensions are not built.  Try: gem pristine unf_ext --version 0.0.7.5
▸ Running script 'Start Packager'
** BUILD FAILED **


Installing build/Build/Products/Debug-iphonesimulator/rrtest.app
An error was encountered processing the command (domain=NSPOSIXErrorDomain, code=22):
Failed to install the requested application
The bundle identifier of the application could not be determined.
Ensure that the application's Info.plist contains a value for CFBundleIdentifier.
Print: Entry, ":CFBundleIdentifier", Does Not Exist

我尝试了一些解决方案,但没有成功。

编辑:附加信息

我把react native端口改成了8088,在project里面修改了。

我是如何解决这个问题的?

获取进程运行在8081端口

sudo lsof -i :8081

然后杀了它。

sudo kill -9 336

*336是PID(进程ID)