react native ios 0.69.1 React-Codegen Build failed答案

【问题标题】：react native ios 0.69.1 React-Codegen Build failedreact native ios 0.69.1 React-Codegen Build failed
【发布时间】：2022-08-15 18:46:52
【问题描述】：

我最近使用npx react-native init myapp --template react-native-template-typescript 创建了一个新项目，一切都在android 中运行，但是当我尝试为iOS 构建时，由于React-Codegen 错误特别是在FBReactNativeSpec.h 文件中，构建失败。下面是 xcode 的构建错误输出：

整个日志：

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)

到目前为止我尝试了什么：

删除podfile.lock, cd ios && pod install
clean build 然后yarn ios
评论了 !use_flipper() 从 Podfile 然后 clean build。
我的配置：

macOS 卡塔利娜
版本 10.15.7
XCode 12.4

正如图片中提到的，它与React-Codegen 相关，并且在react-native-0.69.1 的较新版本中，所以任何人都可以帮我在ios 中解决这个问题吗？

标签： react-native

【解决方案1】：

问题与 IPHONEOS_DEPLOYMENT_TARGET 有关，因此应按照此链接https://github.com/facebook/react-native/issues/34106 中的说明进行修复

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。

【讨论】：