supplementaryContentInsetsReference
The reference boundary for content insets on boundary supplementary items.
Declaration
var supplementaryContentInsetsReference: UIContentInsetsReference { get set }Discussion
This property represents the reference boundary to use when defining contentInsets on NSCollectionLayoutBoundarySupplementaryItem objects.
The default value of this property is UIContentInsetsReference.automatic, which means any insets specified on a NSCollectionLayoutBoundarySupplementaryItem follow the layout configuration’s contentInsetsReference.