创建项目出现这个问题：clang: error: linker command failed with exit code 1

度半 2016-03-18 09:03:12

duplicate symbol _OBJC_CLASS_$_ShoppingCarViewController in:
/Users/apple/Library/Developer/Xcode/DerivedData/demo1-dfevsgimvmtrbfelwahwyqpkazrs/Build/Intermediates/demo1.build/Debug-iphonesimulator/demo1.build/Objects-normal/x86_64/ShoppingCarViewController-D3FF477D55CDCD4D.o
/Users/apple/Library/Developer/Xcode/DerivedData/demo1-dfevsgimvmtrbfelwahwyqpkazrs/Build/Intermediates/demo1.build/Debug-iphonesimulator/demo1.build/Objects-normal/x86_64/ShoppingCarViewController-952D7020FD41EC3B.o
duplicate symbol _OBJC_METACLASS_$_ShoppingCarViewController in:
/Users/apple/Library/Developer/Xcode/DerivedData/demo1-dfevsgimvmtrbfelwahwyqpkazrs/Build/Intermediates/demo1.build/Debug-iphonesimulator/demo1.build/Objects-normal/x86_64/ShoppingCarViewController-D3FF477D55CDCD4D.o
/Users/apple/Library/Developer/Xcode/DerivedData/demo1-dfevsgimvmtrbfelwahwyqpkazrs/Build/Intermediates/demo1.build/Debug-iphonesimulator/demo1.build/Objects-normal/x86_64/ShoppingCarViewController-952D7020FD41EC3B.o
ld: 2 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

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zhao849443636 2016-03-25

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duplicate 是重复的意思就是你这个类ShoppingCarViewControlle 重复了，show in 本地里看看

dirdirdir3 2016-03-21

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是不是ShoppingCarViewController文件加入了2个？

LUCKEYMAN 2016-03-18

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build phases里面看下你的ShoppingCarViewController有没有加进工程

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