在使用Xcode进行iOS开发时遇到错误，涉及_NSPersistentStoreCoordinator、_NSInMemoryStoreType等多个Objective-C类。错误表明在i386架构下缺少符号引用。为解决问题，需要在项目的Build Phases中添加coredata.framework框架，确保项目能正确链接到Core Data库。
错误: "_OBJC_CLASS_$_NSPersistentStoreCoordinator", referenced from:
objc-class-ref in libEaseMobClientSDKLite.a(EMDBManagerBase.o)
Undefined symbols for architecture i386:
"_NSInMemoryStoreType", referenced from:
-[XMPPCoreDataStorage addPersistentStoreWithPath:options:error:] in XMPPCoreDataStorage.o
"_NSInferMappingModelAutomaticallyOption", referenced from:
-[XMPPCoreDataStorage defaultStoreOptions] in XMPPCoreDataStorage.o
"_NSManagedObjectContextDidSaveNotification", referenced from:
-[XMPPCoreDataStorage mainThreadManagedObjectContext] in XMPPCoreDataStorage.o
"_NSMigratePersistentStoresAutomaticallyOption", referenced from:
-[XMPPCoreDataStorage defaultStoreOptions] in XMPPCoreDataStorage.o
"_NSSQLiteStoreType", referenced from:
-[XMPPCoreDataStorage addPersistentStoreWithPath:options:error:] in XMPPCoreDataStorage.o
"_OBJC_CLASS_$_CLLocation", referenced from:
objc-class-ref in XMPPvCardTemp.o
"_OBJC_CLASS_$_NSAttributeDescription", referenced from:
objc-class-ref in XMPPCoreDataStorage.o
"_OBJC_CLASS_$_NSEntityDescription", referenced from:
objc-class-ref in XMPPMessageArchivingCoreDataStorage.o
objc-class-ref in XMPPRoomHybridStorage.o
objc-class-ref in XMPPGroupCoreDataStorageObject.o
objc-class-ref in XMPPCapabilitiesCoreDataStorage.o
objc-class-ref in XMPPvCardCoreDataStorageObject.o
objc-class-ref in XMPPUserCoreDataStorageObject.o
objc-class-ref in XMPPRosterCoreDataStorage.o
回答:
在build phases 里增加coredata.framework
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