升級到xcode4.5後facebook sdk有遇到問題

問題如下

Ld /Users/shih/Library/Developer/Xcode/DerivedData/food-csyywpmvwokybxdzxglwpmdzfgug/Build/Intermediates/food.build/Debug-iphoneos/food.build/Objects-normal/armv7s/food normal armv7s

    cd /Users/shih/Desktop/food

    setenv IPHONEOS_DEPLOYMENT_TARGET 5.0

    setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.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 armv7s -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk -L/Users/shih/Library/Developer/Xcode/DerivedData/food-csyywpmvwokybxdzxglwpmdzfgug/Build/Products/Debug-iphoneos -F/Users/shih/Library/Developer/Xcode/DerivedData/food-csyywpmvwokybxdzxglwpmdzfgug/Build/Products/Debug-iphoneos -F/Users/shih/Desktop/food/../../Documents/FacebookSDK -filelist /Users/shih/Library/Developer/Xcode/DerivedData/food-csyywpmvwokybxdzxglwpmdzfgug/Build/Intermediates/food.build/Debug-iphoneos/food.build/Objects-normal/armv7s/food.LinkFileList -dead_strip -lsqlite3.0 -fobjc-arc -fobjc-link-runtime -miphoneos-version-min=5.0 -framework MapKit -framework MobileCoreServices -framework CoreLocation -framework QuartzCore -framework UIKit -framework Foundation -framework CoreGraphics -framework FacebookSDK -o /Users/shih/Library/Developer/Xcode/DerivedData/food-csyywpmvwokybxdzxglwpmdzfgug/Build/Intermediates/food.build/Debug-iphoneos/food.build/Objects-normal/armv7s/food

ld: file is universal (3 slices) but does not contain a(n) armv7s slice: /Users/shih/Documents/FacebookSDK/FacebookSDK.framework/FacebookSDK for architecture armv7s

clang: error: linker command failed with exit code 1 (use -v to see invocation)

解決辦法：

專案 => TARGET => Build Settings => Vaild Architectures => armv7 armv7s

把armv7 armv7s 改成 armv7