mirror of
https://github.com/Instagram/IGListKit
synced 2026-05-12 11:58:20 +00:00
000bc36919
Summary: Relicensing IGListKit under MIT Reviewed By: calimarkus Differential Revision: D7764125 fbshipit-source-id: 6c773195ef3184202725fe7f08de754f979cb83f
53 lines
1.9 KiB
Objective-C
53 lines
1.9 KiB
Objective-C
/**
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* Copyright (c) 2016-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <UIKit/UIKit.h>
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NS_ASSUME_NONNULL_BEGIN
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/**
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Conform to this protocol to provide information about a list's supplementary views. This data is used in
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`IGListAdapter` which then configures and maintains a `UICollectionView`. The supplementary API reflects that in
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`UICollectionView`, `UICollectionViewLayout`, and `UICollectionViewDataSource`.
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*/
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NS_SWIFT_NAME(ListSupplementaryViewSource)
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@protocol IGListSupplementaryViewSource <NSObject>
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/**
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Asks the SupplementaryViewSource for an array of supported element kinds.
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@return An array of element kind strings that the supplementary source handles.
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*/
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- (NSArray<NSString *> *)supportedElementKinds;
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/**
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Asks the SupplementaryViewSource for a configured supplementary view for the specified kind and index.
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@param elementKind The kind of supplementary view being requested
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@param index The index for the supplementary veiw being requested.
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@note This is your opportunity to do any supplementary view setup and configuration.
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@warning You should never allocate new views in this method. Instead deque a view from the `IGListCollectionContext`.
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*/
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- (__kindof UICollectionReusableView *)viewForSupplementaryElementOfKind:(NSString *)elementKind
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atIndex:(NSInteger)index;
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/**
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Asks the SupplementaryViewSource for the size of a supplementary view for the given kind and index path.
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@param elementKind The kind of supplementary view.
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@param index The index of the requested view.
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@return The size for the supplementary view.
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*/
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- (CGSize)sizeForSupplementaryViewOfKind:(NSString *)elementKind
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atIndex:(NSInteger)index;
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@end
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NS_ASSUME_NONNULL_END
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