A Boolean indicating whether to recompute the layout attributes for items and views in the layout.
- iOS 7.0+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
The default value of this property is
NO. Set this property to
YES if there are changes to the position of items on the screen. For example, the flow layout object sets this property to
YES when the collection view’s bounds change in a way that affects the number of items in a column or row.
When this property is set to
YES, the flow layout object recomputes the layout attributes for its items and views. If the
invalidate property is set to
NO it recomputes this information without asking for new size information.