UIManagedDocument - managedObjectContext

UIManagedDocument 의 managedObjectContext 관련된 LibraryReference 에 기술되지 않은 추가 내용이 UIManageDocument.h 파일에 기술되어 있다.

UIManagedDocument 의 managedObjectContext 는 반드시 NSMainQueueConcurrencyType 으로 생성되어야 하며, parent context 를 가지는 경우 parent 는 NSPrivateQueueConcurrencyType 으로 생성되어야 한다.

즉, UIManagedDocument 의 ConcurrencyType 을 설정해서 간단하게 쓰레드를 분리하는 것은 어렵다. !!!

분리하려면, PrivateQueueConcurrencyType 으로 생성된 ParentContext 를 마스터로 하여 분리해내야 하는 것 같다.

자세하는 테스트 는 나중에 ....

아래는 관련 document 를 발췌한 것이다.

Library Reference

managedObjectContext

The document’s managed object context. (read-only)

@property(nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext

Discussion

The document automatically creates a managed object context using its persistent store coordinator.

Special Considerations

You must not use the document’s managed object context in writeAdditionalContent:toURL:originalContentsURL:error:, or any of the asynchronous UIDocumentmethods.

Availability

• Available in iOS 5.0 and later.

See Also

•   @property managedObjectModel
•   @property persistentStoreOptions

Declared In

UIManagedDocument.h

...

UIManagedDocument.h

NS_CLASS_AVAILABLE_IOS(5_0) @interface UIManagedDocument : UIDocument {

    ...

}

/* Persistent documents always have a managed object context and a persistent store coordinator through that context.  The managed object context is required to be initialized with the concurrency type NSMainQueueConcurrencyType and it must have a parent context initialized with the concurrency type NSPrivateQueueConcurrencyType.

 */

@property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;