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Letting ASCellNode and its subclasses handle didScroll

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This commit is contained in:
Max Gu
2016-02-19 21:30:36 -08:00
parent 53cbd643de
commit 382509fac8
4 changed files with 27 additions and 27 deletions
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15
AsyncDisplayKit/ASCollectionView.mm
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@@ -9,6 +9,7 @@
#import "ASAssert.h"
#import "ASBatchFetching.h"
#import "ASDelegateProxy.h"
#import "ASCellNode+Internal.h"
#import "ASCollectionNode.h"
#import "ASCollectionDataController.h"
#import "ASCollectionViewLayoutController.h"
@@ -541,7 +542,9 @@ static NSString * const kCellReuseIdentifier = @"_ASCollectionViewCell";
if (cellNode.neverShowPlaceholders) {
[cellNode recursivelyEnsureDisplaySynchronously:YES];
}
[_cellsForVisibilityUpdates addObject:cell];
if (ASSubclassOverridesSelector([ASCellNode class], [cellNode class], @selector(_visibleNodeDidScroll:withCellFrame:))) {
[_cellsForVisibilityUpdates addObject:cell];
}
}
- (void)collectionView:(UICollectionView *)collectionView didEndDisplayingCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath
@@ -553,7 +556,10 @@ static NSString * const kCellReuseIdentifier = @"_ASCollectionViewCell";
ASDisplayNodeAssertNotNil(node, @"Expected node associated with removed cell not to be nil.");
[_asyncDelegate collectionView:self didEndDisplayingNode:node forItemAtIndexPath:indexPath];
}
[_cellsForVisibilityUpdates removeObject:cell];
if ([_cellsForVisibilityUpdates containsObject:cell]) {
[_cellsForVisibilityUpdates removeObject:cell];
}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
if ([_asyncDelegate respondsToSelector:@selector(collectionView:didEndDisplayingNodeForItemAtIndexPath:)]) {
@@ -674,9 +680,8 @@ static NSString * const kCellReuseIdentifier = @"_ASCollectionViewCell";
{
for (_ASCollectionViewCell *collectionCell in _cellsForVisibilityUpdates) {
ASCellNode *node = [collectionCell node];
if (node.shouldMonitorScrollViewDidScroll) {
[node _visibleNodeDidScroll:scrollView withCellFrame: node.frame];
}
// Only nodes that respond to the selector are added to _cellsForVisibilityUpdates
[node _visibleNodeDidScroll:scrollView withCellFrame:collectionCell.frame];
}
if (_asyncDelegateImplementsScrollviewDidScroll) {
[_asyncDelegate scrollViewDidScroll:scrollView];