Tag: lion nspersistentdocument

轻量级迁移NSPersistentDocument

我正在尝试在Core Data中进行SQLite存储的轻量级迁移。 在Xcode 4.3.1上使用Lion 10.7.3。 在我的NSPersistentDocument子类（AccountDocument）中，我重写了用于configuration持久性存储协调器的方法，以便获得适当的迁移选项： – (BOOL)configurePersistentStoreCoordinatorForURL:(NSURL *)url ofType:(NSString *)fileType modelConfiguration:(NSString *)configuration storeOptions:(NSDictionary *)storeOptions error:(NSError **)error { NSMutableDictionary *newStoreOptions; if (storeOptions == nil) { newStoreOptions = [NSMutableDictionary dictionary]; } else { newStoreOptions = [storeOptions mutableCopy]; } [newStoreOptions setObject:[NSNumber numberWithBool:YES] forKey:NSMigratePersistentStoresAutomaticallyOption]; [newStoreOptions setObject:[NSNumber numberWithBool:YES] forKey:NSInferMappingModelAutomaticallyOption]; BOOL result = [super configurePersistentStoreCoordinatorForURL:url ofType:fileType modelConfiguration:configuration storeOptions:newStoreOptions error:error]; return […]