本机ios 0.69.1 React-Codegen构建失败

Question

最近我使用npx react-native init myapp --template react-native-template-typescript创建了一个新项目，所有东西都在安卓系统中运行，但是当我尝试为iOS构建时，由于FBReactNativeSpec.h文件中的React-Codegen错误，构建失败了。下面是xcode的生成错误输出：

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整支日志：

In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
/Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:2206:46: error: 'value' is unavailable: introduced in iOS 12.0
  d[@"window"] = window.has_value() ? window.value().buildUnsafeRawValue() : nil;
                                             ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:19:
In file included from /Users/macbookair/Desktop/justChat/ios/Pods/Headers/Public/RCTTypeSafety/RCTTypeSafety/RCTConvertHelpers.h:8:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/optional:953:27: note: 'value' has been explicitly marked unavailable here
    constexpr value_type& value() &
                          ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
/Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:2208:46: error: 'value' is unavailable: introduced in iOS 12.0
  d[@"screen"] = screen.has_value() ? screen.value().buildUnsafeRawValue() : nil;
                                             ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:19:
In file included from /Users/macbookair/Desktop/justChat/ios/Pods/Headers/Public/RCTTypeSafety/RCTTypeSafety/RCTConvertHelpers.h:8:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/optional:953:27: note: 'value' has been explicitly marked unavailable here
    constexpr value_type& value() &
                          ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
/Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:2210:88: error: 'value' is unavailable: introduced in iOS 12.0
  d[@"windowPhysicalPixels"] = windowPhysicalPixels.has_value() ? windowPhysicalPixels.value().buildUnsafeRawValue() : nil;
                                                                                       ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:19:
In file included from /Users/macbookair/Desktop/justChat/ios/Pods/Headers/Public/RCTTypeSafety/RCTTypeSafety/RCTConvertHelpers.h:8:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/optional:953:27: note: 'value' has been explicitly marked unavailable here
    constexpr value_type& value() &
                          ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
/Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:2212:88: error: 'value' is unavailable: introduced in iOS 12.0
  d[@"screenPhysicalPixels"] = screenPhysicalPixels.has_value() ? screenPhysicalPixels.value().buildUnsafeRawValue() : nil;
                                                                                       ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:19:
In file included from /Users/macbookair/Desktop/justChat/ios/Pods/Headers/Public/RCTTypeSafety/RCTTypeSafety/RCTConvertHelpers.h:8:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/optional:953:27: note: 'value' has been explicitly marked unavailable here
    constexpr value_type& value() &
                          ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
/Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:2223:96: error: 'value' is unavailable: introduced in iOS 12.0
  d[@"isIPhoneX_deprecated"] = isIPhoneX_deprecated.has_value() ? @((BOOL)isIPhoneX_deprecated.value()) : nil;
                                                                                               ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:19:
In file included from /Users/macbookair/Desktop/justChat/ios/Pods/Headers/Public/RCTTypeSafety/RCTTypeSafety/RCTConvertHelpers.h:8:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/optional:953:27: note: 'value' has been explicitly marked unavailable here
    constexpr value_type& value() &
                          ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
/Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:2462:68: error: 'value' is unavailable: introduced in iOS 12.0
  d[@"prerelease"] = prerelease.has_value() ? @((double)prerelease.value()) : nil;
                                                                   ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:19:
In file included from /Users/macbookair/Desktop/justChat/ios/Pods/Headers/Public/RCTTypeSafety/RCTTypeSafety/RCTConvertHelpers.h:8:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/optional:953:27: note: 'value' has been explicitly marked unavailable here
    constexpr value_type& value() &
                          ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
/Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:2588:110: error: 'value' is unavailable: introduced in iOS 12.0
  d[@"DEFAULT_BACKGROUND_COLOR"] = DEFAULT_BACKGROUND_COLOR.has_value() ? @((double)DEFAULT_BACKGROUND_COLOR.value()) : nil;
                                                                                                             ^
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm:14:
In file included from /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec.h:19:
In file included from /Users/macbookair/Desktop/justChat/ios/Pods/Headers/Public/RCTTypeSafety/RCTTypeSafety/RCTConvertHelpers.h:8:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/optional:953:27: note: 'value' has been explicitly marked unavailable here
    constexpr value_type& value() &
                          ^
7 errors generated.


** BUILD FAILED **


The following build commands failed:
    CompileC /Users/macbookair/Library/Developer/Xcode/DerivedData/justChat-gvlyyuoxvfahekfvnoiuaatjtplq/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/React-Codegen.build/Objects-normal/x86_64/FBReactNativeSpec-generated.o /Users/macbookair/Desktop/justChat/ios/build/generated/ios/FBReactNativeSpec/FBReactNativeSpec-generated.mm normal x86_64 objective-c++ com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)

到目前为止我尝试过的是：

从cd ios && pod install

• clean build中删除podfile.lock，然后删除yarn ios

• commented !use_flipper()，然后从clean build.

中删除podfile.lock

我的配置：

卡塔利娜( macOS Catalina )

10.15.7版

XCode 12.4

正如图中所提到的，它与React-Codegen相关，并且在较新的react-native-0.69.1版本中，所以有人能在ios中帮助我解决这个问题吗？

Answer 1

问题是关于IPHONEOS_DEPLOYMENT_TARGET的，所以应该像在这个链接https://github.com/facebook/react-native/issues/34106中提到的那样修复它。

Pods/Pods.xcodeproj/xcuserdata/project.pbxproj文件夹中的

将所有'IPHONEOS_DEPLOYMENT_TARGET = 11.0‘更改为'IPHONEOS_DEPLOYMENT_TARGET = 12.4’。保存并运行.