IGListTransitionDelegate

Objective-C

@protocol IGListTransitionDelegate <NSObject>

Swift

protocol IGListTransitionDelegate

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


                    
                    
                    -listAdapter:customizedInitialLayoutAttributes:sectionController:atIndex:

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.


                    
                    
                    -listAdapter:customizedFinalLayoutAttributes:sectionController:atIndex:

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.