目标 C，Mach-O 链接器错误

Question

这里我有一个 Mach-0 链接器错误需要修复。我发现另一个问题与我的非常相似，但解决方案不可行。我该如何解决这个问题？

更新 1：添加重复符号

Ld /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Products/Debug-iphonesimulator/SliderGalore-game.app/SliderGalore-game normal i386 cd "/Volumes/GEOFF'S USB/SliderGalore-game" setenv IPHONEOS_DEPLOYMENT_TARGET 7.0 setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/ usr/sbin:/sbin" /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7。 0.sdk -L/Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Products/Debug-iphonesimulator -F/Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game- gbmatdleglcvgscnctvgetfcneic/Build/Products/Debug-iphonesimulator -filelist /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/ Objects-normal/i386/SliderGalore-game.LinkFileList -Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=7.0 -framework CoreGraphics -framework UIKit -framework基础 -Xlinker -dependency_info -Xlinker /Users/GeoffS ang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGalore-game_dependency_info.dat -o /用户/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Products/Debug-iphonesimulator/SliderGalore-game.app/SliderGalore-game

重复符号 _OBJC_IVAR__SliderGaloreController.tileImageView 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreController.tiles 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _NUM_HORIZONTAL_PIECES 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreController.tileWidth 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _NUM_VERTICAL_PIECES 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreController.tileHeight 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreController.blankPosition 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreController.timer 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _countmove 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _thetime 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreController.imageView 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreFlipsideViewController.PuzzlePicture 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreFlipsideViewController.CountMoves 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreFlipsideViewController.Timer 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreFlipsideViewController.PuzzleLayoutX 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreFlipsideViewController.PuzzleLayoutY 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreFlipsideViewController.Refresh 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_IVAR_$_SliderGaloreFlipsideViewController._delegate 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_CLASS_$_SliderGaloreController 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_METACLASS_$_SliderGaloreController 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_CLASS_$_SliderGaloreFlipsideViewController 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o 重复符号 _OBJC_METACLASS_$_SliderGaloreFlipsideViewController 在： /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects-normal/i386/SliderGaloreFlipsideViewController.o

ld：架构 i386 的 22 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

它们都有相同的基本模式。我们来看第一个：

重复符号 _OBJC_IVAR_$_SliderGaloreController.tileImageView 在：/Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build /Objects-normal/i386/SliderGaloreController.o /Users/GeoffSang/Library/Developer/Xcode/DerivedData/SliderGalore-game-gbmatdleglcvgscnctvgetfcneic/Build/Intermediates/SliderGalore-game.build/Debug-iphonesimulator/SliderGalore-game.build/Objects -normal/i386/SliderGaloreFlipsideViewController.o

重复的符号是：_OBJC_IVAR_$_SliderGaloreController.tileImageView，它指的是SliderGaloreController 类的tileImageView 成员。

错误表明此符号在两个地方定义：SliderGaloreController.o 和 SliderGaloreFlipsideViewController.o，它们很可能是从您的 SliderGaloreController.m 和 SliderGaloreFlipsideViewController.m文件创建的。

根据名称，您的 SliderGaloreFlipsideViewController.m 文件或其 .h 文件中似乎有错字。检查两者并确保@interface 和@implementation 行指定了正确的类名。 SliderGaloreFlipsideViewController.m 或 .h 文件很可能指定类 SliderGaloreController 而不是 SliderGaloreFlipsideViewController。

一个修复程序应该可以清除大部分错误。