我正在尝试通过简单地按照这里的指南来设置一个新的 React Native 项目：https://facebook.github.io/react-native/docs/getting-started
我可以很好地从 Xcode 构建和运行它，只得到一些"语义警告"。
但是，当我运行yarn react-native run-ios时，出现以下错误：
Leos-MacBook-Pro:citymysteryrn leo$ yarn react-native run-ios
yarn run v1.19.1
$ /Users/leo/Projekt/ReactNative/CityMysteryRN/node_modules/.bin/react-native run-ios
info Found Xcode workspace "CityMysteryRN.xcworkspace"
info Building (using "xcodebuild -workspace CityMysteryRN.xcworkspace -configuration Debug -scheme CityMysteryRN -destination id=85422E57-5311-43D4-9292-E02982FB7B67 -derivedDataPath build/CityMysteryRN")
..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
info Installing "DerivedData/Build/Products/Debug-iphonesimulator/CityMysteryRN.app"
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.
Print: Entry, ":CFBundleIdentifier", Does Not Exist
error Command failed: /usr/libexec/PlistBuddy -c Print:CFBundleIdentifier DerivedData/Build/Products/Debug-iphonesimulator/CityMysteryRN.app/Info.plist
Print: Entry, ":CFBundleIdentifier", Does Not Exist
. Run CLI with --verbose flag for more details.
Error: Command failed: /usr/libexec/PlistBuddy -c Print:CFBundleIdentifier DerivedData/Build/Products/Debug-iphonesimulator/CityMysteryRN.app/Info.plist
Print: Entry, ":CFBundleIdentifier", Does Not Exist
at checkExecSyncError (child_process.js:621:11)
at Object.execFileSync (child_process.js:639:15)
at runOnSimulator (/Users/leo/Projekt/ReactNative/CityMysteryRN/node_modules/@react-native-community/cli-platform-ios/build/commands/runIOS/index.js:189:45)
at processTicksAndRejections (internal/process/task_queues.js:93:5)
at async Command.handleAction (/Users/leo/Projekt/ReactNative/CityMysteryRN/node_modules/@react-native-community/cli/build/cliEntry.js:160:7)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
我知道有很多与此相关的问题(和答案(，但这似乎是一个非常广泛的问题，我无法解决。我已经尝试了大多数打印的东西：条目，"：CFBundleIdentifier"，不存在没有任何运气。
我还尝试将这个项目与我知道正在运行的旧 React Native 项目进行比较，并确定了以下差异，但不知道它们是否重要：
node_modules/react-native/中缺少文件夹third-party- 构建文件夹包含文件夹
ios/build/MyProjectName包含Logs、info.plist等，而较旧的项目将这些文件和文件夹直接放在ios/build/
这是yarn react-native info的输出
System:
OS: macOS 10.15.1
CPU: (4) x64 Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz
Memory: 296.96 MB / 8.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 12.13.1 - /var/folders/5k/d42fx4ms6pv83hp9q0f9xvh40000gn/T/yarn--1574448680125-0.03761777189202431/node
Yarn: 1.19.1 - /var/folders/5k/d42fx4ms6pv83hp9q0f9xvh40000gn/T/yarn--1574448680125-0.03761777189202431/yarn
npm: 6.12.1 - /usr/local/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
SDKs:
iOS SDK:
Platforms: iOS 13.2, DriverKit 19.0, macOS 10.15, tvOS 13.2, watchOS 6.1
IDEs:
Xcode: 11.2.1/11B500 - /usr/bin/xcodebuild
npmPackages:
@react-native-community/cli: ^2.9.0 => 2.10.0
react: 16.8.6 => 16.8.6
react-native: 0.60.5 => 0.60.5
npmGlobalPackages:
react-native-git-upgrade: 0.2.7
react-native: 0.53.3
/ios/MyProjectName/Info.plist中的CFBundleIdentifier如下所示：
<key>CFBundleIdentifier</key>
<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
这不是一个正确的解决方案，但是。
我受够了，备份了我的MacBook，把整个东西擦干净了。它现在可以工作了。