mirror of
https://github.com/Instagram/IGListKit
synced 2026-05-21 00:08:22 +00:00
073fc073e0
Summary:
a415ef5552 exposed a bug in `UICollectionView` where its state gets corrupted when deleting the same index path more than once in a single batch update block. This resulted crashes like
```
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x4)
Closes https://github.com/Instagram/IGListKit/pull/657
Reviewed By: jessesquires
Differential Revision: D4913790
Pulled By: rnystrom
fbshipit-source-id: 8f6fcdd2e2438da309fc64ca0ac111b9a0980149
36 lines
1 KiB
Objective-C
36 lines
1 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 "IGListBatchUpdates.h"
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@implementation IGListBatchUpdates
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- (instancetype)init {
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if (self = [super init]) {
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_sectionReloads = [NSMutableIndexSet new];
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_itemInserts = [NSMutableArray new];
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_itemMoves = [NSMutableArray new];
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_itemDeletes = [NSMutableArray new];
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_itemReloads = [NSMutableArray new];
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_itemUpdateBlocks = [NSMutableArray new];
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_itemCompletionBlocks = [NSMutableArray new];
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}
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return self;
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}
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- (BOOL)hasChanges {
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return [self.itemUpdateBlocks count] > 0
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|| [self.sectionReloads count] > 0
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|| [self.itemInserts count] > 0
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|| [self.itemMoves count] > 0
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|| [self.itemReloads count] > 0
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|| [self.itemDeletes count] > 0;
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}
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@end
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