The set of objects registered with the context that have uncommitted changes.
- iOS 3.0+
- macOS 10.4+
- tvOS 9.0+
- watchOS 2.0+
- Core Data
A managed object context does not post key-value observing notifications when the return value of
updated changes. A context does, however, post a
NSManaged notification when a change is made, and a
NSManaged notification and a
NSManaged notification before and after changes are committed respectively.