xCode 8.0更新后的架构arm64的重复符号

问题描述：

更新我的xCode后，我得到重复的符号错误。（找到代码）有没有人也得到这个？如何解决？xCode 8.0更新后的架构arm64的重复符号

我试图从“其它链接器标记”部分删除-ObjC链接器标志，检查进口.m代替.h后，改用“无公共块”的编译器设置为NO，我去Targets -> Build Phases -> Compile源和没有重复出现，尝试所有没有结果。

还有其他想法吗？

duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/FollowingUserViewController.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/ChatViewController.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/MessagesNotifications.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/AppDelegate.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/PicturesCell.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SMAPMainViewController.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/CheckUserTypeViewController.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SmaptersNearYou.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/PostSlider.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/UserSettings.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/EventSliderCell.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/UserProfile.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/EventCell.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/NewsFeed.o duplicate symbol _textViewMaxHeight in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/EventSliderCell.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/ExpressSliderCell.o duplicate symbol _textViewStandardHeight in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/EventSliderCell.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/ExpressSliderCell.o duplicate symbol _textViewStep in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/EventSliderCell.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/ExpressSliderCell.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/FollowerUserViewController.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/FilterAlertView.o duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/SearchView.o /Users/a/Library/Developer/Xcode/DerivedData/SMAP-bshetjpaaresiudzvoubtutnfvuq/Build/Intermediates/SMAP.build/Debug-iphoneos/SMAP.build/Objects-normal/arm64/UserNotificationsViewController.o ld: 20 duplicate symbols for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

您试图清理并删除派生数据？ – CZ54

只是做了它，错误仍然存在:( –

检查你没有'＃import'.m文件的某处，它很可能是SearchView。只是纠缠我一个多小时@！ – Shayno

答

我终于找到了！您可以在设置启用可测试性至否在您的生成设置后编译。

从The Xcode 8 Release Notes：

When the Enable Testability build setting is enabled, Xcode 8 will pass -export_dynamic to the linker to preserve all global symbols for testing. This effectively overrides dead code stripping, which can expose link failures from unused functions that reference undefined symbols. If necessary, disabling testability will allow the link to proceed without source changes. (27684883)

当然，做的最好的事情是是：a）取出导致链接器问题未使用的代码，或b）实际修复链接器问题。

谢谢，这解决了我的问题，而不是其他建议的解决方案将GCC_NO_COMMON_BLOCKS设置为否 – Ivan

@Ivan尼斯，我很高兴我可以帮助！ – JorisH

没有为我工作 –

答

我发现我有两个不同的类在.m文件中声明的常量。这是在这个新版本的xCode之前允许的，但现在看起来像重复，即使这两个类别不会导入彼此，也没有任何关系。

const NSInteger space = 10; < - 名为“空间”应该是在应用程序的唯一，甚至是在.m文件

答

以下修补工作对我来说.. :)

码推荐使用警告标志，并设置GCC_NO_COMMON_BLOCKS为YES。

将其设回NO解决了问题！

谢谢，为我效劳！ – fredpi

@ pi1000，很高兴听到你.. :) –

工作，谢谢！ – amirfl

答

我不想改变任何这些设置，因为没有人真正知道这些可能会有哪些副作用。因此，我想全局搜索该变量名称，将导致一个类中的冲突的名称替换为variable_Classname。

上解决了这个问题对我来说不改变任何设置

答

我知道大多数人被要么无公共块或死代码设置解决这个，但实际上是真正的问题的解决方法。就我而言，我使用的是一个Pod文件，它添加了我已经链接过的相同的库，所以基本上我删除了已在我的Pod文件中编译并且存档功能工作的构建阶段链接库中的重复文件。

这应该是选定的答案。我已经有这个问题一个星期了，我已经看到了很多技巧，那就是要解决这个问题，但是你的回答实际上让我明白了这个问题，所以我可以立即修复它。非常感谢，谢谢！ – Greg

答

从错误信息，它必须是在您的项目中的一些文件重复。比如FilterAlertView，UserNotificationsViewController，SearchView，ExpressSliderCell等等。你可以在你的错误信息中看到这个。

答

我的情况，的Xcode 9，我们在一些头文件

Constants.h多个.m文件

static NSString *const kSomeString = @"SomeString";

所以进口Constants.h被宣告常数导致重复符号

解决方案：

Constants.h

extern NSString * const kSomeString;

Constants.m

NSString *const kSomeString = @"SomeString";

答

的解决方案是在this交。你没有及时了解这一点，但至少现在解决了这个问题，至少在我的情况下，我没有任何与该版本有关的问题。

答

在您的Xcode 9项目中，您将看到左侧3列搜索图标，然后在搜索栏中搜索： -Objc ，然后您会看到一个pod配置文件打开。现在从继承的-ObjC中移除它将解决问题。

xCode 8.0更新后的架构arm64的重复符号

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