iOS - Xcode 5 Clang錯誤

Question

我在Xcode 5中制作原型並且出現了很多錯誤，因此我決定回到繪圖板並開始一個新項目。 當我創建新項目時，它有一個像上一個一樣的clang錯誤。

這就是它所說的

Ld /Users/jaydenkelly/Library/Developer/Xcode/DerivedData/Trivia_in_a_Jar-cqzkvawfethhydcaldqtecmwfkkm/Build/Products/Debug-iphonesimulator/Trivia\ in\ a\ Jar.app/Trivia\ in\ a\ Jar normal i386
    cd "/Users/jaydenkelly/Desktop/Trivia in a Jar"
    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/jaydenkelly/Library/Developer/Xcode/DerivedData/Trivia_in_a_Jar-cqzkvawfethhydcaldqtecmwfkkm/Build/Products/Debug-iphonesimulator -F/Users/jaydenkelly/Library/Developer/Xcode/DerivedData/Trivia_in_a_Jar-cqzkvawfethhydcaldqtecmwfkkm/Build/Products/Debug-iphonesimulator -filelist /Users/jaydenkelly/Library/Developer/Xcode/DerivedData/Trivia_in_a_Jar-cqzkvawfethhydcaldqtecmwfkkm/Build/Intermediates/Trivia\ in\ a\ Jar.build/Debug-iphonesimulator/Trivia\ in\ a\ Jar.build/Objects-normal/i386/Trivia\ in\ a\ Jar.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 Foundation -Xlinker -dependency_info -Xlinker /Users/jaydenkelly/Library/Developer/Xcode/DerivedData/Trivia_in_a_Jar-cqzkvawfethhydcaldqtecmwfkkm/Build/Intermediates/Trivia\ in\ a\ Jar.build/Debug-iphonesimulator/Trivia\ in\ a\ Jar.build/Objects-normal/i386/Trivia\ in\ a\ Jar_dependency_info.dat -o /Users/jaydenkelly/Library/Developer/Xcode/DerivedData/Trivia_in_a_Jar-cqzkvawfethhydcaldqtecmwfkkm/Build/Products/Debug-iphonesimulator/Trivia\ in\ a\ Jar.app/Trivia\ in\ a\ Jar

duplicate symbol _i in:
    /Users/jaydenkelly/Library/Developer/Xcode/DerivedData/Trivia_in_a_Jar-cqzkvawfethhydcaldqtecmwfkkm/Build/Intermediates/Trivia in a Jar.build/Debug-iphonesimulator/Trivia in a Jar.build/Objects-normal/i386/Game.o
    /Users/jaydenkelly/Library/Developer/Xcode/DerivedData/Trivia_in_a_Jar-cqzkvawfethhydcaldqtecmwfkkm/Build/Intermediates/Trivia in a Jar.build/Debug-iphonesimulator/Trivia in a Jar.build/Objects-normal/i386/Test.o
ld: 1 duplicate symbol for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

看起來你有兩個全局變量_i ，一個在Game.m ，一個在Test.m文件中。 如果您不需要它們在整個程序中可見，請將它們設置為static 。