Xcode問題「_main」

Question

我一直在這個問題上停留了一段時間。無數的時間和時間，我仍然無法弄清楚。我有這個問題嗎？

Ld /Users/alangibson/Library/Developer/Xcode/DerivedData/PumpkinMenace-ddpkivitawzujwdpdfyngakgkyxs/Build/Products/Debug-iphonesimulator/PumpkinMenace.app/PumpkinMenace normal i386 
    cd "/Users/alangibson/GameMaker-Studio/Pumpkin Menace/PumpkinMenace" 
    export IPHONEOS_DEPLOYMENT_TARGET=5.1.1 
    export 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/iPhoneSimulator8.0.sdk -L/Users/alangibson/Library/Developer/Xcode/DerivedData/PumpkinMenace-ddpkivitawzujwdpdfyngakgkyxs/Build/Products/Debug-iphonesimulator -L. -LFw -LPumpkinMenace -LFw/iOSSource -LPumpkinMenace/Game -LPumpkinMenace/Supporting\ Files -LFw/iOSSource/Source -LPumpkinMenace/Game/iOSSource -LPumpkinMenace/Supporting\ Files/__MACOSX -LPumpkinMenace/Supporting\ Files/games -LPumpkinMenace/Supporting\ Files/InAppSettings.bundle -LFw/iOSSource/Source/GoogleAdMobAdsSdkiOS-6.8.0 -LPumpkinMenace/Game/iOSSource/Source -LPumpkinMenace/Game/iOSSource/Source/GoogleAdMobAdsSdkiOS-6.8.0 -F/Users/alangibson/Library/Developer/Xcode/DerivedData/PumpkinMenace-ddpkivitawzujwdpdfyngakgkyxs/Build/Products/Debug-iphonesimulator -F/Users/alangibson/GameMaker-Studio/Pumpkin\ Menace/PumpkinMenace/Fw -F/Users/alangibson/GameMaker-Studio/Pumpkin\ Menace/PumpkinMenace/PumpkinMenace/Supporting\ Files -filelist /Users/alangibson/Library/Developer/Xcode/DerivedData/PumpkinMenace-ddpkivitawzujwdpdfyngakgkyxs/Build/Intermediates/Pumpkin\ Menace.build/Debug-iphonesimulator/PumpkinMenace.build/Objects-normal/i386/PumpkinMenace.LinkFileList -Xlinker -objc_abi_version -Xlinker 2 -objC -all_load -fobjc-arc -stdlib=libstdc++ -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=5.1.1 -liconv -framework CoreMedia -framework SystemConfiguration -framework EventKit -framework EventKitUI -framework CoreTelephony -framework CoreData -framework CoreText -framework StoreKit -framework MapKit -framework AddressBookUI -framework CFNetwork -framework MobileCoreServices -framework Security -lsqlite3.0 -framework AddressBook -framework CoreLocation -framework MessageUI -framework MediaPlayer -framework AudioToolbox -framework GameKit -framework AVFoundation -lz -framework OpenGLES -framework QuartzCore -framework OpenAL -framework UIKit -framework Foundation -framework CoreGraphics -lFlurry -lyoyo_interpreted -framework GameController -framework FacebookSDK -framework AdSupport -framework iAd -lGoogleAdMobAds -Xlinker -dependency_info -Xlinker /Users/alangibson/Library/Developer/Xcode/DerivedData/PumpkinMenace-ddpkivitawzujwdpdfyngakgkyxs/Build/Intermediates/Pumpkin\ Menace.build/Debug-iphonesimulator/PumpkinMenace.build/Objects-normal/i386/PumpkinMenace_dependency_info.dat -o /Users/alangibson/Library/Developer/Xcode/DerivedData/PumpkinMenace-ddpkivitawzujwdpdfyngakgkyxs/Build/Products/Debug-iphonesimulator/PumpkinMenace.app/PumpkinMenace 

這是錯誤

ld: warning: ignoring file PumpkinMenace/Supporting Files/libyoyo_interpreted.a, file was built for archive which is not the architecture being linked (i386): PumpkinMenace/Supporting Files/libyoyo_interpreted.a
Undefined symbols for architecture i386:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

是的，每一個iPhone項目具有「main.m」文件（在Xcode 6.1，它通常是在項目的「支持文件」文件夾中隱藏）。

如果您沒有該main.m文件（其中包含main C樣式函數），那就是您看到錯誤的原因。

這裏是主要的功能是什麼樣子：

int main(int argc, char * argv[]) { 
    @autoreleasepool { 
     return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); 
    } 
} 

Answer 2

"Undefined symbols for architecture i386"

也許問題出在libyoyo_interpreted.a文件，因爲它是爲iPhone模擬器架構（I386）所建，但你嘗試運行應用程序在設備上（這是arm7/armv7/arm64）。

爲arm7/armv7體系結構重建libyoyo_interpreted.a。 （它對我有幫助http://blog.diogot.com/blog/2013/09/18/static-libs-with-support-to-ios-5-and-arm64/）