部署到10.6时出现ARC错误

Question

我的应用程序运行并在10.7上测试但后来意识到我需要它才能在早期版本上运行.不幸的是,我从一开始就用ARC开始了这个项目.

现在我的构建设置是debug base sdk:10.7,release base sdk:10.6.当我尝试存档我的应​​用程序时,我收到以下错误:

Undefined symbols for architecture x86_64:
"_objc_retain", referenced from:
  +[__ARCLite__ load] in libarclite_macosx.a(arclite.o)
  -[AppDelegate applicationDidFinishLaunching:] in AppDelegate.o
  -[AppDelegate managedObjectModel] in AppDelegate.o
  -[AppDelegate persistentStoreCoordinator] in AppDelegate.o
  -[AppDelegate managedObjectContext] in AppDelegate.o
  -[AppDelegate windowWillReturnUndoManager:] in AppDelegate.o
  -[AppDelegate saveAction:] in AppDelegate.o
  ...
 (maybe you meant: _objc_retainedObject)
"_objc_release", referenced from:
  -[AppDelegate applicationDidFinishLaunching:] in AppDelegate.o
  -[AppDelegate applicationFilesDirectory] in AppDelegate.o
  -[AppDelegate managedObjectModel] in AppDelegate.o
  -[AppDelegate persistentStoreCoordinator] in AppDelegate.o
  -[AppDelegate managedObjectContext] in AppDelegate.o
  -[AppDelegate windowWillReturnUndoManager:] in AppDelegate.o
  -[AppDelegate saveAction:] in AppDelegate.o
  ...
"_objc_retainAutoreleasedReturnValue", referenced from:
  -[AppDelegate applicationFilesDirectory] in AppDelegate.o
  -[AppDelegate managedObjectModel] in AppDelegate.o
  -[AppDelegate persistentStoreCoordinator] in AppDelegate.o
  -[AppDelegate managedObjectContext] in AppDelegate.o
  -[AppDelegate windowWillReturnUndoManager:] in AppDelegate.o
  -[AppDelegate saveAction:] in AppDelegate.o
  -[AppDelegate applicationShouldTerminate:] in AppDelegate.o
  ...
"_objc_autoreleaseReturnValue", referenced from:
  -[AppDelegate applicationFilesDirectory] in AppDelegate.o
  -[AppDelegate managedObjectModel] in AppDelegate.o
  -[AppDelegate persistentStoreCoordinator] in AppDelegate.o
  -[AppDelegate managedObjectContext] in AppDelegate.o
  -[AppDelegate windowWillReturnUndoManager:] in AppDelegate.o
  -[MainWindowController viewForTag:] in MainWindowController.o
  -[MainWindowController tableView:objectValueForTableColumn:row:] in MainWindowController.o
  ...
"_objc_storeStrong", referenced from:
  -[AppDelegate persistentStoreCoordinator] in AppDelegate.o
  -[AppDelegate saveAction:] in AppDelegate.o
  -[AppDelegate applicationShouldTerminate:] in AppDelegate.o
  -[AppDelegate .cxx_destruct] in AppDelegate.o
  -[MainWindowController init] in MainWindowController.o
  -[MainWindowController viewForTag:] in MainWindowController.o
  -[MainWindowController showUserFinderView:] in MainWindowController.o
  ...
"_objc_retainAutoreleaseReturnValue", referenced from:
  +[MainWindowController sharedInstance] in MainWindowController.o
  -[FileMetaData getFileName] in FileMetaData.o
  -[FileMetaData getLastHash] in FileMetaData.o
  -[FileMetaData getCreationDate] in FileMetaData.o
  -[FileMetaData getLastModified] in FileMetaData.oe
  -[FileMetaData getLocalPath] in FileMetaData.o
  ...
"_objc_autorelease", referenced from:
  -[SBJsonParser objectWithString:error:] in SBJsonParser.o
  -[SBJsonTokeniser getStringToken:] in SBJsonTokeniser.o
  -[SBJsonTokeniser getNumberToken:] in SBJsonTokeniser.o
  -[SBJsonUTF8Stream getRetainedStringFragment:] in SBJsonUTF8Stream.o
  -[SBJsonWriter stringWithObject:error:] in SBJsonWriter.o
"_objc_retainAutorelease", referenced from:
  -[SBJsonTokeniser getStringToken:] in SBJsonTokeniser.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

它似乎是ARC的一个问题,但我不知道从哪里开始修复它.有什么建议？谢谢.

Answer 1

您需要将SDK设置为10.7 - 但您可以将部署目标设置为10.6.虽然在这个问题中详细说明了一些注意事项:如何在启用ARC的情况下部署到Snow Leopard