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Assert supplementary node validity before data controller use

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This commit is contained in:
Levi McCallum
2015-10-06 09:28:42 -07:00
parent 769a67569c
commit 5839e5bf3e
1 changed files with 4 additions and 1 deletions
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5
AsyncDisplayKit/ASCollectionView.mm
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@@ -733,7 +733,10 @@ static BOOL _isInterceptedSelector(SEL sel)
- (ASDisplayNode *)dataController:(ASCollectionDataController *)dataController supplementaryNodeOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath - (ASDisplayNode *)dataController:(ASCollectionDataController *)dataController supplementaryNodeOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{ {
return [_asyncDataSource collectionView:self nodeForSupplementaryElementOfKind:kind atIndexPath:indexPath]; ASDisplayNode *node = [_asyncDataSource collectionView:self nodeForSupplementaryElementOfKind:kind atIndexPath:indexPath];
ASDisplayNodeAssert(node != nil, @"A node must be returned for a supplementary node");
ASDisplayNodeAssert(!node.nodeLoaded, @"The supplementary node must not be loaded");
return node;
} }
- (NSArray *)supplementaryNodeKindsInDataController:(ASCollectionDataController *)dataController - (NSArray *)supplementaryNodeKindsInDataController:(ASCollectionDataController *)dataController