有几个潜在的错误配置可能会导致这个问题，

Please confirm that you have opened the .xcworkspace but not .xcodeproj file. Also make sure you have build Social first before you build TriviaApp. Make sure that iOS Deployment Target is set same for all modules with main app. For example is TriviaApps deployment target is set to 9.0, Socials deployment target also need to be set to 9.0. Make sure your main module (TriviaApp) and your used framework (Social) have same set of configurations. i.e. If your Project has three configurations, Debug, Release, ReleasePremium than your Social framework also need to have three configurations Debug, Release, ReleasePremium. Also make sure that the archive configuration is set same for both TriviaApp and Social. i.e. if your TriviaApps archive scheme is set to ReleasePremium, your Socials archive scheme also need to be set into ReleasePremium. Please assure that you do not need to import Social in each .swift files when its already added in the Bridging-Header.h. In case of issue came from Pod files, make sure you have uncommented #use_frameworks! into use_frameworks! from you Podfile. Sometime re installing pod works if Social has any dependency on pods. If none of the above steps works, delete your derived data folder and try re building.

我得到这个问题是因为我在podfile中设置了错误的目标(项目本身而不是UITests部分)。

至于xCode 12和模拟器，

当你导航到Pods时，错误可能会消失。项目导航器中的Xcodeproj， 在“排除架构”下的构建设置中，对于每个调试和发布，选择值为arm64的“任何iOS模拟器SDK”。

大多数其他答案都是针对CocoaPods或迦太基用户的。如果你不使用这些，但只是想在你的项目中删除一个框架并链接它，它将需要在框架搜索路径中。

系统框架已经在搜索路径(即/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/ sdk/ iPhoneOS${version}.sdk/ system /Library/ frameworks /)。如果您试图使用的文件不在此路径中，则需要将它们的路径添加到Build Settings中的FRAMEWORK_SEARCH_PATHS中。

为什么XCode不知道在哪里找到它，即使你左边面板上的框架在右边面板的标识和类型中列出了一个位置和完整的路径?那我不知道。

我只是通过删除引用来删除框架，然后再次添加它们。

当框架没有正确编译时也会发生这种情况。

在Xcode中打开框架项目，看看Product→Build是否成功。

一旦在框架中修复了构建错误，打开主项目，看看是否可以导入框架。