React Native：在XCode 9.2和9.4以及RN 55.4上构建IOS失败

Question

所以标题说，我试过两个Xcode版本，但仍然没有运气。这是我得到的错误：

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_RCTCxxBridge", referenced from:
      objc-class-ref in libReact.a(RCTBridge.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我试过了：

• 遵循这些建议here
• 在构建之间清理项目
• 重启XCode和mac本身
• 添加对podfile的修改，如下所示：

  # Uncomment the next line to define a global platform for your project
   platform :ios, '9.0'
  
  target 'Absent' do
    # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
    # use_frameworks!
  
    # Pods for Absent
      pod 'Firebase/Core', '~> 5.3.0'
      pod 'Firebase/Messaging', '~> 5.3.0'
      pod 'yoga', :path => '../node_modules/react-native/ReactCommon/yoga/'
      pod 'React', path: '../node_modules/react-native', :subspecs => [
      'RCTGeolocation',
      'RCTNetwork',
      'Core',
      'DevSupport',
      'BatchedBridge',
      'RCTAnimation',
      'RCTText',
      'RCTWebSocket'
      ]
  
    target 'AbsentTests' do
      inherit! :search_paths
      # Pods for testing
    end
  
  end
  
  target 'Absent-tvOS' do
    # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
    # use_frameworks!
  
    # Pods for Absent-tvOS
  
    target 'Absent-tvOSTests' do
      inherit! :search_paths
      # Pods for testing
    end
  
  end
  
  post_install do |installer|
   installer.pods_project.targets.each do |target|
      if target.name == "React"
           target.remove_from_project
       end
   end
  end

• 尝试使用RCTCxxBridge和CxxBridge而不是BatchedBridge，因为它被认为已被弃用

但仍然没有运气......任何指针都会在这里受到赞赏:)

Answer 1

因此，根据评论，显然这是以前失败的构建缓存，这会搞乱我的归档过程。我所要做的就是删除node_modules，ios/builds和ios/Pods然后再次做npm install，react-native link和cd ios && pod install，项目一切都很好。

之后我得到duplicate symbols on arm64错误，这只是因为react-native和RCTWebSocket都有一些重叠的类。所以要解决这个问题，我只需要从XCode的General选项卡上的Project的libRCTWebSocket.a info子类别中删除Linked Frameworks and Libraries。

特别感谢@needsleep的解决方案！