Question

当我建立时，我正在

 Ld /Users/Shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Products/Debug-iphoneos/appname.app/appname normal armv7
    cd "/Users/shouri/Desktop/appname Project/appname"
    setenv IPHONEOS_DEPLOYMENT_TARGET 6.1
    setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.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 armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk -L/Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Products/Debug-iphoneos -F/Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Products/Debug-iphoneos -filelist /Users/shouri/Library/Developer/Xcode/DerivedDataappname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/appname.LinkFileList -dead_strip -fobjc-arc -fobjc-link-runtime -miphoneos-version-min=6.1 -framework CoreData -framework AVFoundation -framework MobileCoreServices -framework QuartzCore -framework UIKit -framework Foundation -framework CoreGraphics -o /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Products/Debug-iphoneos/appname.app/appname

duplicate symbol _OBJC_IVAR_$_HatsCamera.cameraSwitch in:
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/HatsCamera.o
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/BottomsCamera.o
duplicate symbol _OBJC_IVAR_$_HatsCamera.FrontCamera in:
    /Users/shouri/Library/Developer/Xcode/DerivedData/appaname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/HatsCamera.o
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/BottomsCamera.o
duplicate symbol _OBJC_IVAR_$_HatsCamera.captureImage in:
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/HatsCamera.o
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/BottomsCamera.o
duplicate symbol _OBJC_IVAR_$_HatsCamera.stillImageOutput in:
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/HatsCamera.o
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/BottomsCamera.o
duplicate symbol _OBJC_IVAR_$_HatsCamera.haveImage in:
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/HatsCamera.o
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/BottomsCamera.o
duplicate symbol _OBJC_IVAR_$_HatsCamera.imagePreview in:
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/HatsCamera.o
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/BottomsCamera.o
duplicate symbol _OBJC_CLASS_$_HatsCamera in:
    /Users/shouri/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/HatsCamera.o
    /Users/shourio/Library/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/BottomsCamera.o
duplicate symbol _OBJC_METACLASS_$_HatsCamera in:
    /Users/shouriLibrary/Developer/Xcode/DerivedData/appname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/HatsCamera.o
    /Users/shouri/Library/Developer/Xcode/DerivedDataappname-defwdplzurhoraeqlkbatxopkutg/Build/Intermediates/appname.build/Debug-iphoneos/appname.build/Objects-normal/armv7/BottomsCamera.o
ld: 8 duplicate symbols for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我如何摆脱这个问题，因为我已经浏览了几个星期的互联网，找不到适合我的问题的最佳答案..

Answer 1

duplicate symbol _OBJC_IVAR_$_HatsCamera.cameraSwitch in:
/Users/shouri/Library/.../HatsCamera.o
/Users/shouri/Library/.../BottomsCamera.o

HatsCamera.cameraSwitch似乎不止一次被宣布。这只是其中一个错误，但其他错误都属于同一类。

如果您无法找到错误，请发布源代码，以便我们查看问题所在。

Answer 2

ld: 8 duplicate symbols for architecture armv7

是您错误的原因。在您的项目中，您似乎有两个相同的文件，这导致了错误。

彻底查看项目和项目文件夹中的HatsCamera.m和BottomsCamera.m文件。尝试完全删除它们并读取它们。

构建时Apple Mach-O链接器错误

2 个答案: