Instance Property


A Boolean that indicates whether the layout should ask for new section and item counts.


@property(nonatomic, readonly) BOOL invalidateDataSourceCounts;


You do not set this property yourself. The collection view sets it in response to specific types of layout invalidation scenarios. For example, the collection view sets it to YES when you insert or delete items or call the collection view’s reloadData method.

If this property is set to YES, the layout object should query its delegate for the number of sections and items and update its layout based on the new number of items.

See Also

Invalidating the Collection View Data


A Boolean that indicates that all layout data should be marked as invalid.