IGListTransitionDelegate

@protocol IGListTransitionDelegate <NSObject>

Conform to IGListTransitionDelegate to provide customized layout information for a collection view.

  • Asks the delegate to customize and return the starting layout information for an item being inserted into the collection view.

    Declaration

    Objective-C

    - (UICollectionViewLayoutAttributes *)listAdapter:(IGListAdapter *)listAdapter
                    customizedInitialLayoutAttributes:
                        (UICollectionViewLayoutAttributes *)attributes
                                    sectionController:
                                        (IGListSectionController *)sectionController
                                              atIndex:(NSInteger)index;

    Swift

    func listAdapter(_ listAdapter: Any!, customizedInitialLayoutAttributes attributes: Any!, sectionController: Any!, atIndex index: Any!) -> Any!

    Parameters

    listAdapter

    The adapter controlling the list.

    attributes

    The starting layout information for an item being inserted into the collection view.

    sectionController

    The section controller to perform the transition on.

    index

    The index of the item being inserted.

  • Asks the delegate to customize and return the final layout information for an item that is about to be removed from the collection view.

    Declaration

    Objective-C

    - (UICollectionViewLayoutAttributes *)listAdapter:(IGListAdapter *)listAdapter
                      customizedFinalLayoutAttributes:
                          (UICollectionViewLayoutAttributes *)attributes
                                    sectionController:
                                        (IGListSectionController *)sectionController
                                              atIndex:(NSInteger)index;

    Swift

    func listAdapter(_ listAdapter: Any!, customizedFinalLayoutAttributes attributes: Any!, sectionController: Any!, atIndex index: Any!) -> Any!

    Parameters

    listAdapter

    The adapter controlling the list.

    attributes

    The final layout information for an item that is about to be removed from the collection view.

    sectionController

    The section controller to perform the transition on.

    index

    The index of the item being deleted.