[尝试在ios设备上运行React-Native应用程序时，为什么所有RCT…都引用“未定义符号”错误？

Question

我正在尝试在设备上运行我的第一个React-Native应用程序，但是构建始终失败，并出现以下错误：

ld: warning: directory not found for option '-L/Users/XXXX/Library/Developer/Xcode/DerivedData/nigh-hktjvygosupgnoaafsvgyowhzsqi/Build/Products/Debug-iphoneos/React'

ld: warning: directory not found for option '-L/Users/XXXX/Library/Developer/Xcode/DerivedData/nigh-hktjvygosupgnoaafsvgyowhzsqi/Build/Products/Debug-iphoneos/React'

ld: warning: directory not found for option '-L/Users/XXXX/Library/Developer/Xcode/DerivedData/nigh-hktjvygosupgnoaafsvgyowhzsqi/Build/Products/Debug-iphoneos/React'

ld: warning: ignoring file /Users/XXXX/Nigh/ReactNativeNigh/Nigh/ios/build/nigh/Build/Products/Debug-iphonesimulator/React/libReact.a, file was built for archive which is not the architecture being linked (arm64): /Users/XXXX/Nigh/ReactNativeNigh/Nigh/ios/build/nigh/Build/Products/Debug-iphonesimulator/React/libReact.a

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_RCTBridge", referenced from:
      objc-class-ref in AppDelegate.o
  "_OBJC_CLASS_$_RCTBundleURLProvider", referenced from:
      objc-class-ref in AppDelegate.o
  "_OBJC_CLASS_$_RCTConvert", referenced from:
      objc-class-ref in libRNGestureHandler.a(RNFlingHandler.o)
      objc-class-ref in libRNGestureHandler.a(RNForceTouchHandler.o)
      objc-class-ref in libRNGestureHandler.a(RNLongPressHandler.o)
      objc-class-ref in libRNGestureHandler.a(RNNativeViewHandler.o)
      objc-class-ref in libRNGestureHandler.a(RNPanHandler.o)
      objc-class-ref in libRNGestureHandler.a(RNGestureHandlerModule.o)
      objc-class-ref in libRNGestureHandler.a(RNGestureHandler.o)
      ...

React directory not found error

几件事：

该项目在XCode模拟器上运行良好。

我正在使用cocoapods，并尝试从xcWorkspace而不是项目运行构建（尽管目标的完整路径是/Users/XXXX/Nigh/ReactNativeNigh/Nigh/ios/nigh.xcodeproj，这使我有些困惑） 。

我已删除并重新安装了节点模块，已链接并完成了新的Pod安装。

看来我所要做的就是将React添加到Debug-iphoneos文件夹，但是我不确定如何执行此操作，或者这是否是解决方案。我的第一个尝试是确保React处于Scheme的构建目标中。它是列表中第一个选中所有框的项目，但出于某种原因它表示React（missing）。对于React Native / Xcode Upgrade and now RCTConvert.h not found，我从“目标”列表中删除了React（missing），并尝试再次添加React，但是React甚至没有出现在列表中。另外，Pods / Products文件夹显示的libReact.a与其他.a文件不同，没有Archive（？）图标：

List of Pod/Products

这里是Podfile：

require_relative '../node_modules/react-native-unimodules/cocoapods'

target 'nigh' do
  # Pods for nigh
  use_frameworks!

    # pod 'AWSCore', '~> 2.12.0'
    pod 'AWSCore', '~> 2.10.2'
    pod 'AWSAppSync', '~> 2.14.2'

  pod 'React', :path => '../node_modules/react-native', :subspecs => [
    'Core',
    'CxxBridge',
    'DevSupport',
    'RCTActionSheet',
    'RCTAnimation',
    'RCTBlob',
    'RCTGeolocation',
    'RCTImage',
    'RCTLinkingIOS',
    'RCTNetwork',
    'RCTSettings',
    'RCTText',
    'RCTVibration',
    'RCTWebSocket',
  ]

  pod 'yoga', :path => '../node_modules/react-native/ReactCommon/yoga'

  pod 'DoubleConversion', :podspec => '../node_modules/react-native/third-party-podspecs/DoubleConversion.podspec'
  pod 'glog', :podspec => '../node_modules/react-native/third-party-podspecs/glog.podspec'
  pod 'Folly', :podspec => '../node_modules/react-native/third-party-podspecs/Folly.podspec'
  pod 'RNGestureHandler', :podspec => '../node_modules/react-native-gesture-handler/RNGestureHandler.podspec'
  pod 'RNReanimated', :podspec => '../node_modules/react-native-reanimated/RNReanimated.podspec'
  pod 'react-native-google-maps', path: '../node_modules/react-native-maps'  # Uncomment this line if you want to support GoogleMaps on iOS
  pod 'GoogleMaps'  # Uncomment this line if you want to support GoogleMaps on iOS
  pod 'Google-Maps-iOS-Utils' # Uncomment this line if you want to support GoogleMaps on iOS

  use_unimodules!


  pod 'RNVectorIcons', :path => '../node_modules/react-native-vector-icons'

  pod 'react-native-maps', :path => '../node_modules/react-native-maps'

  pod 'RNDeviceInfo', :path => '../node_modules/react-native-device-info'

  pod 'react-native-slider', :path => '../node_modules/@react-native-community/slider'

  pod 'react-native-notifications', :path => '../node_modules/react-native-notifications'

  pod 'react-native-cameraroll', :path => '../node_modules/@react-native-community/cameraroll'

  pod 'react-native-image-picker', :path => '../node_modules/react-native-image-picker'

  pod 'RNFS', :path => '../node_modules/react-native-fs'

end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    if target.name == 'react-native-google-maps'
      target.build_configurations.each do |config|
        config.build_settings['CLANG_ENABLE_MODULES'] = 'No'
      end
    end

    #if target.name == "React"
    #  target.remove_from_project
    #end
  end
end

我注释了if target.name ==“ React”块，但无论哪种方式都显示错误。

我是正确的假设问题是，React不在该方案的构建目标中，如果有，是否有人知道如何将其包括在内？如果不是，是否有人知道真正的原因是什么/如何解决/解决它？

Answer 1

我相信您的问题来自use_frameworks!，请尝试删除该行，再次删除DerivedData，Pods，xcworkspace，Podfile.lock和pod install。

我上个月升级RN版本时遇到此问题。这个愚蠢的事情花了我1个星期的时间才知道问题所在，并且花了20分钟来解决。

希望此帮助