环信IOS SDk 2.3.0集成报错

Undefined symbols for architecture armv7:

  "_NSSQLiteStoreType", referenced from:

      -[EMOldDBManager persistentStoreCoordinator] in libEaseMobClientSDK.a(EMOldDBManager.o)

  "_OBJC_CLASS_$_NSEntityDescription", referenced from:

      objc-class-ref in libEaseMobClientSDK.a(EMOldDBManager.o)

  "_NSInferMappingModelAutomaticallyOption", referenced from:

      -[EMOldDBManager persistentStoreCoordinator] in libEaseMobClientSDK.a(EMOldDBManager.o)

  "_OBJC_CLASS_$_NSPersistentStoreCoordinator", referenced from:

      objc-class-ref in libEaseMobClientSDK.a(EMOldDBManager.o)

  "_NSMigratePersistentStoresAutomaticallyOption", referenced from:

      -[EMOldDBManager persistentStoreCoordinator] in libEaseMobClientSDK.a(EMOldDBManager.o)

  "_OBJC_CLASS_$_NSManagedObjectContext", referenced from:

      objc-class-ref in libEaseMobClientSDK.a(EMOldDBManager.o)

  "_OBJC_CLASS_$_NSMergePolicy", referenced from:

      objc-class-ref in libEaseMobClientSDK.a(EMOldDBManager.o)

  "_OBJC_CLASS_$_NSManagedObjectModel", referenced from:

      objc-class-ref in libEaseMobClientSDK.a(EMOldDBManager.o)

  "_OBJC_CLASS_$_NSFetchRequest", referenced from:

      objc-class-ref in libEaseMobClientSDK.a(EMOldDBManager.o)

ld: symbol(s) not found for architecture armv7

clang: error: linker command failed with exit code 1 (use -v to see invocation)