mirror of
https://github.com/Instagram/IGListKit
synced 2026-05-06 06:58:26 +00:00
46a124ddfe
Summary: This change allows arbitrary layouts to be used in tandem with IGListCollectionView and recieve udpated section indices, by conforming to to conform IGListCollectionViewLayoutCompatible. Reviewed By: maxoll Differential Revision: D13671204 fbshipit-source-id: e030f413aefff71754731d1259037077ffb73959
105 lines
3.1 KiB
Objective-C
105 lines
3.1 KiB
Objective-C
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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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 "IGListCollectionView.h"
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#import "IGListCollectionViewLayoutCompatible.h"
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#import "IGListCollectionViewLayout.h"
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@implementation IGListCollectionView
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#pragma mark - Init
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- (instancetype)initWithFrame:(CGRect)frame {
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IGListCollectionViewLayout *layout = [[IGListCollectionViewLayout alloc] initWithStickyHeaders:NO topContentInset:0 stretchToEdge:YES];
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return [self initWithFrame:frame listCollectionViewLayout:layout];
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}
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- (instancetype)initWithFrame:(CGRect)frame listCollectionViewLayout:(UICollectionViewLayout<IGListCollectionViewLayoutCompatible> *)collectionViewLayout {
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return [super initWithFrame:frame collectionViewLayout:collectionViewLayout];
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}
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#pragma mark - IGListCollectionViewLayout
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- (UICollectionViewLayout<IGListCollectionViewLayoutCompatible> *)_listLayout {
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if ([self.collectionViewLayout conformsToProtocol:@protocol(IGListCollectionViewLayoutCompatible)]) {
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return (UICollectionViewLayout<IGListCollectionViewLayoutCompatible> *)self.collectionViewLayout;
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}
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return nil;
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}
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#pragma mark - Overides reloads
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- (void)reloadItemsAtIndexPaths:(NSArray<NSIndexPath *> *)indexPaths {
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[self _didModifyIndexPaths:indexPaths];
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[super reloadItemsAtIndexPaths:indexPaths];
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}
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- (void)reloadSections:(NSIndexSet *)sections {
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[self _didModifySections:sections];
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[super reloadSections:sections];
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}
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#pragma mark - Override deletes
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- (void)deleteItemsAtIndexPaths:(NSArray<NSIndexPath *> *)indexPaths {
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[self _didModifyIndexPaths:indexPaths];
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[super deleteItemsAtIndexPaths:indexPaths];
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}
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- (void)deleteSections:(NSIndexSet *)sections {
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[self _didModifySections:sections];
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[super deleteSections:sections];
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}
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#pragma mark - Override inserts
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- (void)insertItemsAtIndexPaths:(NSArray<NSIndexPath *> *)indexPaths {
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[self _didModifyIndexPaths:indexPaths];
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[super insertItemsAtIndexPaths:indexPaths];
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}
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- (void)insertSections:(NSIndexSet *)sections {
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[self _didModifySections:sections];
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[super insertSections:sections];
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}
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#pragma mark - Override moves
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- (void)moveItemAtIndexPath:(NSIndexPath *)indexPath toIndexPath:(NSIndexPath *)newIndexPath {
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[self _didModifyIndexPaths:@[indexPath, newIndexPath]];
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[super moveItemAtIndexPath:indexPath toIndexPath:newIndexPath];
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}
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- (void)moveSection:(NSInteger)section toSection:(NSInteger)newSection {
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[self _didModifySection:MIN(section, newSection)];
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[super moveSection:section toSection:newSection];
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}
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#pragma mark - Modify section
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- (void)_didModifySections:(NSIndexSet *)sections {
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if (sections.count == 0) {
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return;
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}
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[self _didModifySection:sections.firstIndex];
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}
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- (void)_didModifySection:(NSUInteger)section {
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[self._listLayout didModifySection:section];
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}
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#pragma mark - Modified index path
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- (void)_didModifyIndexPaths:(NSArray<NSIndexPath *> *)indexPaths {
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for (NSIndexPath *indexPath in indexPaths) {
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[self _didModifySection:indexPath.section];
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}
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}
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@end
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