duplicate symbol _x in:
/Users/app/Library/Developer/Xcode/DerivedData/ChinaEnterprise-evaxoeaznbkdasfxetdeypsnzxtx/Build/Intermediates/ChinaEnterprise.build/Debug-iphonesimulator/ChinaEnterprise.build/Objects-normal/i386/CompaniesViewController.o
/Users/app/Library/Developer/Xcode/DerivedData/ChinaEnterprise-evaxoeaznbkdasfxetdeypsnzxtx/Build/Intermediates/ChinaEnterprise.build/Debug-iphonesimulator/ChinaEnterprise.build/Objects-normal/i386/IndexMainViewController.o
ld: 1 duplicate symbol for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
这个常常遇到的问题，，，坑，
_x重复，搜索这两个类的x会发现重复，去掉一个就可以
我遇到的是静态变量重复const