IGListKit/Source/IGListTransitionDelegate.h
Ryan Nystrom 000bc36919 Relicense to MIT
Summary: Relicensing IGListKit under MIT

Reviewed By: calimarkus

Differential Revision: D7764125

fbshipit-source-id: 6c773195ef3184202725fe7f08de754f979cb83f
2018-05-01 14:50:56 -07:00

34 lines
1.7 KiB
Objective-C

/**
* Copyright (c) 2016-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
/**
Conform to `IGListTransitionDelegate` to provide customized layout information for a collection view.
*/
@protocol IGListTransitionDelegate <NSObject>
/**
Asks the delegate to customize and return the starting layout information for an item being inserted into the collection view.
@param listAdapter The adapter controlling the list.
@param attributes The starting layout information for an item being inserted into the collection view.
@param sectionController The section controller to perform the transition on.
@param index The index of the item being inserted.
*/
- (UICollectionViewLayoutAttributes *)listAdapter:(IGListAdapter *)listAdapter customizedInitialLayoutAttributes:(UICollectionViewLayoutAttributes *)attributes sectionController:(IGListSectionController *)sectionController atIndex:(NSInteger)index;
/**
Asks the delegate to customize and return the final layout information for an item that is about to be removed from the collection view.
@param listAdapter The adapter controlling the list.
@param attributes The final layout information for an item that is about to be removed from the collection view.
@param sectionController The section controller to perform the transition on.
@param index The index of the item being deleted.
*/
- (UICollectionViewLayoutAttributes *)listAdapter:(IGListAdapter *)listAdapter customizedFinalLayoutAttributes:(UICollectionViewLayoutAttributes *)attributes sectionController:(IGListSectionController *)sectionController atIndex:(NSInteger)index;
@end