mirror of
https://github.com/Instagram/IGListKit
synced 2026-05-14 04:49:05 +00:00
edc38c77fe
Summary: Issue fixed: #655 - [x] All tests pass. Demo project builds and runs. - [ ] I added tests, an experiment, or detailed why my change isn't tested. - [ ] I added an entry to the `CHANGELOG.md` for any breaking changes, enhancements, or bug fixes. - [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/.github/CONTRIBUTING.md) I've also addressed a few cases where there was no empty line between the `param`s and `return`. Closes https://github.com/Instagram/IGListKit/pull/665 Differential Revision: D4906215 Pulled By: jessesquires fbshipit-source-id: 5693c85eb548644b0b0e2571eea8ff4d9f706b12
54 lines
1.9 KiB
Objective-C
54 lines
1.9 KiB
Objective-C
/**
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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 <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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@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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