React Native iOS 0.69.1 React-Codegen构建失败

Question

我最近使用 npx React-NIT INIT MYAPP创建了一个新项目-Template React-Template-Typescript ，一切都在Android中起作用，但是当我尝试为iOS构建时，构建构建失败会到期 react-codegen 在 fbreActNativePec.h 文件中专门存在错误。以下是Xcode的构建错误输出：

整体日志：

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)

到目前为止尝试的内容：

1. 删除 podfile.lock ， cd ios＆amp;＆amp; pod install
2. 清洁构建，然后 YARN IOS
3. 注释！use_flipper（）来自 podfile 然后清洁构建。

我的配置：

macos catalina
版本10.15.7
Xcode 12.4

如图中所述，它与 react> react-codegen 相关，并且在 react> react-native-0.69.1 的较新版本中，任何人都可以帮助我修复修复这个问题在iOS中？

Answer 1

问题是关于iPhoneos_deployment_target，因此应如下链接中所述进行修复

在iOS文件夹中转到pods/pods.xcodeproj/xcuserdata/project.pbxproj

将所有“ iPhoneos_deployment_target = 11.0”更改为'iphoneos_deployment_target = 12.4'。保存并运行。