我正在使用objective-c編寫程序。現在我打算在我的項目中添加一個UDP服務器和客戶端,然後將該文件添加到xcode項目中,該項目可以成功運行。但是當我添加另一個mainudp.m和upd.h和upd.m後,程序無法運行,這裏是錯誤信息,如何解決這個問題?由於添加UDP服務器和客戶端後發生錯誤
Ld /Users/bacd/Library/Developer/Xcode/DerivedData/dd-hggkyympepqrutcpbxxlwmtzcjkb/Build/Products/Debug/dd.app/Contents/MacOS/dd normal x86_64
cd /Users/bacd/Desktop/de
export MACOSX_DEPLOYMENT_TARGET=10.7
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -L/Users/bacd/Library/Developer/Xcode/DerivedData/dd-hggkyympepqrutcpbxxlwmtzcjkb/Build/Products/Debug -F/Users/bacd/Library/Developer/Xcode/DerivedData/dd-hggkyympepqrutcpbxxlwmtzcjkb/Build/Products/Debug -F/Users/bacd/Desktop/de/Bluewear\ OSX -filelist /Users/bacd/Library/Developer/Xcode/DerivedData/dd-hggkyympepqrutcpbxxlwmtzcjkb/Build/Intermediates/dd.build/Debug/dd.build/Objects-normal/x86_64/dd.LinkFileList -mmacosx-version-min=10.7 -fobjc-arc -fobjc-link-runtime -framework AVFoundation -framework QuartzCore -framework CoreAudio -framework Carbon -framework IOBluetooth -framework Cocoa -framework CoreServices -Xlinker -dependency_info -Xlinker /Users/bacd/Library/Developer/Xcode/DerivedData/dd-hggkyympepqrutcpbxxlwmtzcjkb/Build/Intermediates/dd.build/Debug/dd.build/Objects-normal/x86_64/dd_dependency_info.dat -o /Users/bacd/Library/Developer/Xcode/DerivedData/dd-hggkyympepqrutcpbxxlwmtzcjkb/Build/Products/Debug/dd.app/Contents/MacOS/dd
duplicate symbol _main in:
/Users/bacd/Library/Developer/Xcode/DerivedData/dd-hggkyympepqrutcpbxxlwmtzcjkb/Build/Intermediates/dd.build/Debug/dd.build/Objects-normal/x86_64/main.o
/Users/bacd/Library/Developer/Xcode/DerivedData/dd-hggkyympepqrutcpbxxlwmtzcjkb/Build/Intermediates/dd.build/Debug/dd.build/Objects-normal/x86_64/mainudp.o
ld: 1 duplicate symbol for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)