mirror of
https://github.com/Instagram/IGListKit
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64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
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/**
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* Copyright (c) 2016-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import <Foundation/Foundation.h>
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@class IGListBindingSectionController;
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@protocol IGListBindable;
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@protocol IGListDiffable;
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NS_ASSUME_NONNULL_BEGIN
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/**
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A protocol that returns data to power cells in an `IGListBindingSectionController`.
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*/
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@protocol IGListBindingSectionControllerDataSource <NSObject>
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/**
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Create an array of view models given a top-level object.
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@param sectionController The section controller requesting view models.
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@param object The top-level object that powers the section controller.
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@return A new array of view models.
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*/
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- (NSArray<id<IGListDiffable>> *)sectionController:(IGListBindingSectionController *)sectionController
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viewModelsForObject:(id)object;
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/**
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Return a dequeued cell for a given view model.
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@param sectionController The section controller requesting a cell.
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@param viewModel The view model for the cell.
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@param index The index of the view model.
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@return A dequeued cell.
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@note The section controller will call `-bindViewModel:` with the provided view model after the cell is dequeued. You
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should handle cell configuration using this method. However, you can do additional configuration at this stage as well.
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*/
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- (UICollectionViewCell<IGListBindable> *)sectionController:(IGListBindingSectionController *)sectionController
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cellForViewModel:(id)viewModel
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atIndex:(NSInteger)index;
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/**
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Return a cell size for a given view model.
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@param sectionController The section controller requesting a size.
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@param viewModel The view model for the cell.
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@param index The index of the view model.
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@return A size for the view model.
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*/
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- (CGSize)sectionController:(IGListBindingSectionController *)sectionController
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sizeForViewModel:(id)viewModel
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atIndex:(NSInteger)index;
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@end
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NS_ASSUME_NONNULL_END
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