How to add observers to an NSManagedObject?

What is the preferred approach to registering observers on an NSManagedObject (since Core Data "'owns' the lifecycle" of managed objects)?

Am I correct that the way to do this is to listen for NSManagedO开发者_StackOverflow中文版bjectContextObjectsDidChange-Notification and call addObserver:... for NSInsertedObjectsKey and removeObserver:... for NSDeletedObjectsKey?

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In order to observe MOs throughout their lifecycles, add observers when they come into existence, with awakeFromInsert and awakeFromFetch.

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Yeah, you're correct. Observing the MOs directly will lead to trouble, for reasons you have already posted in your question (within the parentheses).