Class

UICollectionViewUpdateItem

An object that describes a single change to make to an item in a collection view.

Overview

You do not create instances of this class directly. When updating its content, the collection view object creates them and passes them to the layout object’s prepare(forCollectionViewUpdates:) method, which can use them to prepare the layout object for the upcoming changes.

Topics

Accessing the Item Changes

var indexPathBeforeUpdate: IndexPath?

The index path of the item before the update.

var indexPathAfterUpdate: IndexPath?

The index path of the item after the update.

var updateAction: UICollectionUpdateAction

The action being performed on the item.

Constants

enum UICollectionUpdateAction

Constants indicating the type of action being performed on an item.

Relationships

Inherits From

Conforms To

See Also

Updates

class UICollectionViewFocusUpdateContext

A context object that stores information specific to a focus update in a collection view.

class UICollectionViewLayoutInvalidationContext

A context object that declares which parts of your layout need to be updated when the layout is invalidated.

class UICollectionViewFlowLayoutInvalidationContext

A set of properties for determining whether to recompute the size of items or their position in the layout.