嘗試使用Xcode進(jìn)行編譯時(shí)，出現(xiàn)以下錯(cuò)誤：  **Ld /Users/doronkatz/Library/Developer/Xcode/DerivedData/iKosher-bphnihrngmqtkqfgievrrumzmyce/Build/Products/Debug-iphonesimulator/iKosher.app/iKosher normal i386    cd /Users/doronkatz/Sites/xCode/iKosher    setenv MACOSX_DEPLOYMENT_TARGET 10.6    setenv PATH "/Xcode4/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Xcode4/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"    /Xcode4/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -isysroot /Xcode4/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk -L/Users/doronkatz/Library/Developer/Xcode/DerivedData/iKosher-bphnihrngmqtkqfgievrrumzmyce/Build/Products/Debug-iphonesimulator -L/Users/doronkatz/Sites/xCode/iKosher -F/Users/doronkatz/Library/Developer/Xcode/DerivedData/iKosher-bphnihrngmqtkqfgievrrumzmyce/Build/Products/Debug-iphonesimulator -filelist /Users/doronkatz/Library/Developer/Xcode/DerivedData/iKosher-bphnihrngmqtkqfgievrrumzmyce/Build/Intermediates/iKosher.build/Debug-iphonesimulator/iKosher.build/Objects-normal/i386/iKosher.LinkFileList -mmacosx-version-min=10.6 -all_load -ObjC -Xlinker -objc_abi_version -Xlinker 2 -lz -framework Security -framework CFNetwork -framework CoreData -framework Foundation -framework UIKit -framework CoreGraphics -framework QuartzCore -o /Users/doronkatz/Library/Developer/Xcode/DerivedData/iKosher-bphnihrngmqtkqfgievrrumzmyce/Build/Products/Debug-iphonesimulator/iKosher.app/iKosherUndefined symbols for architecture i386:  "_UTTypeCreatePreferredIdentifierForTag", referenced from:      +[ASIHTTPRequest mimeTypeForFileAtPath:] in ASIHTTPRequest.o  "_UTTypeCopyPreferredTagWithClass", referenced from:      +[ASIHTTPRequest mimeTypeForFileAtPath:] in ASIHTTPRequest.o  "_kUTTagClassMIMEType", referenced from:      +[ASIHTTPRequest mimeTypeForFileAtPath:] in ASIHTTPRequest.o  "_kUTTagClassFilenameExtension", referenced from:      +[ASIHTTPRequest mimeTypeForFileAtPath:] in ASIHTTPRequest.o不知道這意味著什么。