错误：链接器命令失败，退出代码为 1（使用 -v 查看调用）

Question

我在尝试将项目从 Objective C 迁移到 swift 并使用 cocoa pod 而不是手动添加的库时遇到此错误，我无法跟踪它，因此我感谢任何帮助解决它。

提前谢谢..

重复符号 _OBJC_IVAR_$_TicketViewController._ticketPaymentLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._tripNumberLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._ticketCountDownLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._passDescriptionLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._passSerialLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._eventStartDateLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._boardingStartDateLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._ticketExpirationDateLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._tripTypeLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._eventPlaceNameLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._tripNumberTitleLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._printedMessageLabel 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._sponsor4Back in： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号_OBJC_IVAR_$_TicketViewController._sponsor3返回： 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重复符号_OBJC_IVAR_$_TicketViewController._sponsor1返回： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._tripDestinationTime 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o 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_OBJC_IVAR_$_TicketViewController._mapViewTitle 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._eventTitle 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._printedPassMessageTitle 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._eventImage 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o 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_OBJC_IVAR_$_TicketViewController._barCodeImage 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._swipeMode 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复的符号 _OBJC_IVAR_$_TicketViewController._flipped 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController.passId 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._sponsor4 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._tripDetailsLabel4 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o 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_OBJC_IVAR_$_TicketViewController._tripSeatingLabel3 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._sponsor2 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._tripDetailsLabel2 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._eventSeatingLabel2 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._tripSeatingLabel2 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._sponsor1 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._tripDetailsLabel1 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._eventSeatingLabel1 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o 重复符号 _OBJC_IVAR_$_TicketViewController._tripSeatingLabel1 在： /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-99E5E166CAD49D3E.o /Users/ams/Library/Developer/Xcode/DerivedData/PassApp-ezwbfrgglhkbdwdtwkntnojcfxay/Build/Intermediates.noindex/PassApp.build/Debug-iphonesimulator/PassApp.build/Objects-normal/x86_64/TicketViewController-AC0A4978BB9E2178.o ld：架构 x86_64 的 93 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

您的错误意味着由于某种原因，您的 pod 被复制了两次。

如果您仍在使用用 Obj-c 编写的库，我假设您已经阅读了 how to add a bridging header 的文档。

如果您在代码中没有做错任何事情（例如不小心从 pod 手动复制文件，然后尝试使用 pod！我以前搞砸过，它会发生。）这个错误最常发生离开cleaning your project and then deleting derived data.

Answer 2

大约1.5天后终于解决了，TicketViewController.m文件在项目Build阶段添加了两次（重复）>>编译源，只是删除了其中一个，现在错误消失了，非常感谢@MQLN你的支持