objective-c – 部署到10.6时出现ARC错误

概述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", ref 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.old: symbol(s) not found for architecture x86_64clang: 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.

解决方法 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,但有一些警告： How to deploy to Snow Leopard with ARC enabled 总结

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