ios - Apple Mach-O 链接器错误 - 体系结构 x86_64 : "_UISceneWillEnterForegroundNotification" and "___isPlatformVersionAtLeast" 的 undefined symbol

Question

我正在使用https://github.com/tinycreative/react-native-intercom并在那里完成安装和 https://developers.intercom.com/installing-intercom/docs/ios-installation

这在一段时间内运行良好，然后突然开始。

  "_UISceneWillEnterForegroundNotification", referenced from:
      +[ICMBridge load] in Intercom(ICMBridge.o)
  "___isPlatformVersionAtLeast", referenced from:
      -[IntercomSDK_IntercomConversationCollectionViewController insetsForAccessoryView] in Intercom(IntercomConversationCollectionViewController.o)
      +[IntercomSDK_ITBUpload createUploadForMediaAsset:completion:] in Intercom(ITBUpload.o)
      +[IntercomSDK_ITBUpload processImageDataForUpload:mediaAsset:info:imageUploadDataUTI:completion:] in Intercom(ITBUpload.o)
      -[IntercomSDK_IIMInputAccessoryView createConstraints] in Intercom(IIMInputAccessoryView.o)
      -[IntercomSDK_IIMInputButtonContainerView createConstraints] in Intercom(IIMInputButtonContainerView.o)
      -[IntercomSDK_IIMMediaViewController updateCollectionViewContentInsets] in Intercom(IIMMediaViewController.o)
      -[IntercomSDK_IIMMediaViewController layoutExpandButton] in Intercom(IIMMediaViewController.o)
      ...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

2019年12月9日，Intercom发布sdk版本5.5.0，支持iOS 13。

https://github.com/intercom/intercom-ios/releases/tag/5.5.0

UISceneWillEnterForegroundNotification 和 isPlatformVersionAtLeast 位于 iOS SDK 13 中，因此需要 Xcode 11 beta。我认为您收到错误是因为您使用的是较早的 Xcode 版本，例如 Xcode 10.3 等。

理想情况下，Intercom 应该有条件地支持 iOS 13，这样代码就不会在 13.0 之前的 iOS sdk 版本上损坏