ContactItemChangeObserver

Declaration

protocol ContactItemChangeObserver

Overview

Your implementation of enumerateChanges(startingAt:for:) receives an observer that conforms to this type. As you enumerate over your contacts, you provide them to the observer with the didUpdate(_:) and didDelete(_:) methods.

Topics

Providing change data

• didUpdate(_:)
• ContactItem
• didDelete(_:)
• ContactItem.Identifier

Ending enumeration

• didFinishEnumeratingChanges(upTo:moreComing:)
• ContactItemSyncAnchor
• didFinishEnumeratingChangesWithError(_:)

Optimizing observer batching

• suggestedBatchSize

See Also

Receiving contacts

• ContactItemContentObserver