如何解决为什么即使删除了引起它们的文件，我的iOS项目中仍然仍然存在mach-o链接器错误？
| 这些是错误：Ld /Users/gearhead2727/Library/Developer/Xcode/DerivedData/TR-bwdsurqqtlxmnhdpvfqmdqftqsun/Build/Intermediates/TR.build/Debug-iphoneos/TR.build/Objects-normal/armv6/TR normal armv6
cd /Users/gearhead2727/DropBox/TR
setenv IPHONEOS_DEPLOYMENT_TARGET 4.0.1
setenv PATH \"/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin\"
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++-4.2 -arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk -L/Users/gearhead2727/Library/Developer/Xcode/DerivedData/TR-bwdsurqqtlxmnhdpvfqmdqftqsun/Build/Products/Debug-iphoneos \"-L/Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.3.2 (8H7)/Symbols/usr/lib\" -F/Users/gearhead2727/Library/Developer/Xcode/DerivedData/TR-bwdsurqqtlxmnhdpvfqmdqftqsun/Build/Products/Debug-iphoneos -F/Users/gearhead2727/DropBox/TR/../../Downloads -filelist /Users/gearhead2727/Library/Developer/Xcode/DerivedData/TR-bwdsurqqtlxmnhdpvfqmdqftqsun/Build/Intermediates/TR.build/Debug-iphoneos/TR.build/Objects-normal/armv6/TR.LinkFileList -dead_strip -ObjC -miphoneos-version-min=4.0.1 -framework Foundation -framework UIKit -framework CoreGraphics -framework AddressBookUI -lz.1.1.3 -lsqlite3.0 -framework SystemConfiguration -framework Security -framework QuartzCore -framework CFNetwork -framework CoreLocation -framework MapKit -framework AddressBook -framework GameKit -framework AVFoundation -framework MessageUI -lxml2 -framework StoreKit -o /Users/gearhead2727/Library/Developer/Xcode/DerivedData/TR-bwdsurqqtlxmnhdpvfqmdqftqsun/Build/Intermediates/TR.build/Debug-iphoneos/TR.build/Objects-normal/armv6/TR
Undefined symbols for architecture armv6:
\"_class_addMethod\",referenced from:
_SHKSwizzle in SHK.o
\"__objc_empty_vtable\",referenced from:
_OBJC_MetaCLASS_$_TRAppDelegate in TRAppDelegate.o
_OBJC_CLASS_$_TRAppDelegate in TRAppDelegate.o
_OBJC_MetaCLASS_$_TRViewController in TRViewController.o
_OBJC_CLASS_$_TRViewController in TRViewController.o
_OBJC_MetaCLASS_$_SBet in SBet.o
_OBJC_CLASS_$_SBet in SBet.o
_OBJC_MetaCLASS_$_RaceView in RaceView.o
...
\"_method_getTypeEncoding\",referenced from:
_SHKSwizzle in SHK.o
\"___objc_personality_v0\",referenced from:
+[FBTranslationsLoader sharedInstance] in FBTranslationsLoader.o
\"_ceil\",referenced from:
_EstimateBas64EncodedDataSize in Base64Transcoder.o
-[FBDialog sizetoFitOrientation:] in FBDialog.o
-[FBDialog drawRect:] in FBDialog.o
\"_sel_registerName\",referenced from:
-[NSObject(WeakLinking) findSelectorForProperty:named:forReading:] in NSObject+WeakLinking.o
\"_class_getInstanceMethod\",referenced from:
_SHKSwizzle in SHK.o
\"_floor\",referenced from:
-[FBDialog sizetoFitOrientation:] in FBDialog.o
-[FBDialog show] in FBDialog.o
\"_CC_MD5\",referenced from:
-[FBRequest md5HexDigest:] in FBRequest.o
\"_objc_getProperty\",referenced from:
-[SHKOAuthSharer signatureProvider] in SHKOAuthSharer.o
-[SHKOAuthSharer accesstoken] in SHKOAuthSharer.o
-[SHKOAuthSharer requestToken] in SHKOAuthSharer.o
-[SHKOAuthSharer consumer] in SHKOAuthSharer.o
-[SHKSharer request] in SHKSharer.o
-[SHKSharer pendingForm] in SHKSharer.o
-[SHKSharer item] in SHKSharer.o
...
\"_objc_setProperty\",referenced from:
-[TRAppDelegate setwindow:] in TRAppDelegate.o
-[TRAppDelegate setViewController:] in TRAppDelegate.o
-[TRViewController setGameCenterManager:] in TRViewController.o
-[TRViewController setCurrentleaderboard:] in TRViewController.o
-[FacebookAgent setUserInfo:] in FacebookAgent.o
-[FacebookAgent setPermissionStatus:] in FacebookAgent.o
-[FacebookAgent setUploadImageAlbum:] in FacebookAgent.o
...
\"_objc_enumerationMutation\",referenced from:
-[SHK showViewController:] in SHK.o
+[SHK favoriteSharersForType:] in SHK.o
+[SHK logoutOfAll] in SHK.o
+[SHK flushOfflineQueue] in SHK.o
+[SHKOAuthSharer logout] in SHKOAuthSharer.o
-[SHKSharer isAuthorized] in SHKSharer.o
-[SHKSharer authorizationFormSave:] in SHKSharer.o
...
\"_objc_sync_enter\",referenced from:
+[FBTranslationsLoader sharedInstance] in FBTranslationsLoader.o
\"_class_replaceMethod\",referenced from:
_SHKSwizzle in SHK.o
\"_CCHmac\",referenced from:
-[OAHMAC_SHA1SignatureProvider signClearText:withSecret:] in OAHMAC_SHA1SignatureProvider.o
\"_property_getAttributes\",referenced from:
-[NSObject(WeakLinking) findSelectorForProperty:named:forReading:] in NSObject+WeakLinking.o
\"__objc_empty_cache\",referenced from:
_OBJC_MetaCLASS_$_TRAppDelegate in TRAppDelegate.o
_OBJC_CLASS_$_TRAppDelegate in TRAppDelegate.o
_OBJC_MetaCLASS_$_TRViewController in TRViewController.o
_OBJC_CLASS_$_TRViewController in TRViewController.o
_OBJC_MetaCLASS_$_SBet in SBet.o
_OBJC_CLASS_$_SBet in SBet.o
_OBJC_MetaCLASS_$_RaceView in RaceView.o
...
\"_method_getImplementation\",referenced from:
_SHKSwizzle in SHK.o
\"_class_getProperty\",referenced from:
-[NSObject(WeakLinking) findSelectorForPropertyNamed:forReading:] in NSObject+WeakLinking.o
\"_round\",referenced from:
+[SHKActivityIndicator currentIndicator] in SHKActivityIndicator.o
-[SHKActivityIndicator setCenterMessage:] in SHKActivityIndicator.o
-[SHKActivityIndicator showSpinner] in SHKActivityIndicator.o
-[SHKFormFieldCell layoutSubviews] in SHKFormFieldCell.o
\"_objc_sync_exit\",referenced from:
+[FBTranslationsLoader sharedInstance] in FBTranslationsLoader.o
\"__Unwind_SjLj_Unregister\",referenced from:
+[FBTranslationsLoader sharedInstance] in FBTranslationsLoader.o
\"_objc_msgSend\",referenced from:
-[TRAppDelegate application:didFinishLaunchingWithOptions:] in TRAppDelegate.o
-[TRAppDelegate dealloc] in TRAppDelegate.o
-[TRViewController madeTurtle] in TRViewController.o
-[TRViewController soundButtonPress:] in TRViewController.o
-[TRViewController alertView:diddismissWithButtonIndex:] in TRViewController.o
-[TRViewController launchTurtleMaker:] in TRViewController.o
-[TRViewController pressRestart:] in TRViewController.o
...
\"_method_exchangeImplementations\",referenced from:
_SHKSwizzle in SHK.o
\"_objc_msgSendSuper2\",referenced from:
-[TRAppDelegate dealloc] in TRAppDelegate.o
-[TRViewController dealloc] in TRViewController.o
-[TRViewController didReceiveMemoryWarning] in TRViewController.o
-[SBet initWithFrame:] in SBet.o
-[SBet dealloc] in SBet.o
-[LoadedTurtleView viewDidLoad] in LoadedTurtleView.o
-[FacebookAgent initWithApiKey:ApiSecret:ApiProxy:] in FacebookAgent.o
...
\"__Unwind_SjLj_Resume\",referenced from:
+[FBTranslationsLoader sharedInstance] in FBTranslationsLoader.o
\"__Unwind_SjLj_Register\",referenced from:
+[FBTranslationsLoader sharedInstance] in FBTranslationsLoader.o
\"_objc_msgSend_stret\",referenced from:
-[RaceView useSpeedTurt] in RaceView.o
-[RaceView beginRace] in RaceView.o
-[RaceView viewDidLoad] in RaceView.o
-[RaceView moveTurtles] in RaceView.o
-[TurtleMakerController addImage:addImage:addImage:addImage:] in TurtleMakerController.o
-[UserRaceView viewDidLoad] in UserRaceView.o
-[UserRaceView uMoveButton:] in UserRaceView.o
...
ld: symbol(s) not found for architecture armv6
collect2: ld returned 1 exit status
解决方法
尝试：
退出xcode
rm -rf〜/库/开发人员/ Xcode / DerivedData /
rm -rf <项目目录> / build
看起来您似乎可能由于错误而缺少基本库之一。在添加asihttprequest之前，尝试将.xcodeproj还原为一个版本吗？
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