Question

我更新Xcode后出现重复符号错误。（找到代码）有人也得到这个吗？怎么可以解决？

我尝试从＆＃34;其他链接标记＆＃34;中删除-ObjC链接器标记。部分，在导入.m而不是.h后检查，切换＆＃34; No Common Blocks＆＃34;编译器设置为NO，我去了Targets -> Build Phases -> Compile来源，没有重复，尝试了所有没有结果。

还有其他想法吗？

复制符号_space： /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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 复制符号_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 重复符号_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 重复符号_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 重复符号_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 复制符号_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 复制符号_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 复制符号_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：架构arm64的20个重复符号 clang：错误：链接器命令失败，退出代码为1（使用-v查看调用）

Answer 1

以下Patch为我工作.. :)）

建议使用警告标志并将GCC_NO_COMMON_BLOCKS设置为YES。

将其设置为NO解决了问题！

Answer 2

我终于找到了！您可以在构建设置中将启用可测试性设置为否后进行编译。

来自The Xcode 8 Release Notes：

启用Enable Testability构建设置后，Xcode 8会将-export_dynamic传递给链接器以保留所有全局符号以进行测试。这有效地覆盖了死代码剥离，这可能会暴露引用未定义符号的未使用函数的链接失败。如有必要，禁用可测试性将允许链接在没有源更改的情况下继续。（27684883）

当然，最好的办法是：a）删除导致链接器问题的未使用代码，或b）实际修复链接器问题。

Answer 3

据我所知，大多数人都是通过No Common Blocks或Dead Code设置解决这个问题，但这实际上是真正问题的解决方法。在我的情况下，我使用的是一个Pod文件，它添加了我已经链接过的相同库，所以基本上我删除了我的Build Phases链接库中的重复文件，这些库已经在我的Pod文件中编译并且存档功能正常工作。

Answer 4

我发现我在每个2个不同的类中声明了常量，在.m文件中。这是在xCode的这个新版本之前允许的，但是现在看起来像重复版，即使这两个类没有相互导入，也没有与另一个类无关。

const NSInteger space = 10; ＆lt; - 名称“space”在应用程序上应该是唯一的，即使它在.m文件中

Answer 5

对于我的情况， Xcode 9 ，我们在某些头文件中声明了常量

<强> Constants.h

static NSString *const kSomeString = @"SomeString";

因此，在多个.m文件中导入Constants.h会导致重复的符号

<强>解决方案：

<强> Constants.h

extern NSString * const kSomeString;

<强> Constants.m

NSString *const kSomeString = @"SomeString";

Answer 6

在您的Xcode 9项目中，您将看到左侧3列搜索图标，然后搜索： -ObjC 在搜索栏中，然后您将看到一个pod配置文件打开。现在从继承中删除-ObjC将解决问题。

Answer 7

我不想更改任何这些设置，因为没有人真正知道这些可能产生的其他副作用。所以我在全局搜索该变量名称，将导致一个类冲突的名称替换为variable_Classname。

这为我解决了这个问题而没有改变任何设置

Answer 8

从错误信息中，它必须是项目中的某些文件重复。如FilterAlertView，UserNotificationsViewController，SearchView，ExpressSliderCell ......等。您可以在错误信息中看到这一点。

Answer 9

解决方案在this帖子中。你现在还不是最新的，但至少它现在解决了这个问题，至少在我的情况下我对这个版本没有任何问题。

Answer 10

这些是我为解决此问题而采取的步骤：

选择第一个重复的编译源...在错误消息中搜索某些内容，例如：CDVWKWebViewEngine或EventSliderCell.o；
在XCODE中选择您的项目（左上角），然后选择“构建阶段”；
在过滤器文本字段中，输入已报告为重复的编译源（例如CDVWKWebViewEngine）；
对于该来源，您应该至少收到2条结果-一个在cordova-plugin-ionic -...中，而另一个在cordova-plugin-wkwebview -......中
选择cordova-plugin-wkwebview-…一个，然后单击“-”号（左下）；
现在尝试再次构建并对所有重复的编译源执行此操作。

Xcode 8.0更新后，架构arm64的重复符号

10 个答案: