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Update ASCellNode visibility API

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This commit is contained in:
Huy Nguyen
2016-02-29 16:21:19 -08:00
parent 07ad27c7f6
commit c64f23725f
4 changed files with 42 additions and 11 deletions
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20
AsyncDisplayKit/ASCollectionView.mm
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@@ -542,8 +542,11 @@ static NSString * const kCellReuseIdentifier = @"_ASCollectionViewCell";
if (cellNode.neverShowPlaceholders) {
[cellNode recursivelyEnsureDisplaySynchronously:YES];
}
if (ASSubclassOverridesSelector([ASCellNode class], [cellNode class], @selector(visibleNodeDidScroll:withCellFrame:))) {
if (ASSubclassOverridesSelector([ASCellNode class], [cellNode class], @selector(cellNodeVisibilityEvent:inScrollView:withCellFrame:))) {
[_cellsForVisibilityUpdates addObject:cell];
[cellNode cellNodeVisibilityEvent:ASCellNodeVisibilityEventVisible
inScrollView:collectionView
withCellFrame:cell.frame];
}
}
@@ -556,8 +559,14 @@ 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]) {
ASCellNode *node = ((_ASCollectionViewCell *)cell).node;
[node cellNodeVisibilityEvent:ASCellNodeVisibilityEventInvisible
inScrollView:collectionView
withCellFrame:cell.frame];
[_cellsForVisibilityUpdates removeObject:cell];
}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
@@ -681,9 +690,10 @@ static NSString * const kCellReuseIdentifier = @"_ASCollectionViewCell";
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
for (_ASCollectionViewCell *collectionCell in _cellsForVisibilityUpdates) {
ASCellNode *node = [collectionCell node];
// Only nodes that respond to the selector are added to _cellsForVisibilityUpdates
[node visibleNodeDidScroll:scrollView withCellFrame:collectionCell.frame];
[[collectionCell node] cellNodeVisibilityEvent:ASCellNodeVisibilityEventVisibleRectChanged
inScrollView:scrollView
withCellFrame:collectionCell.frame];
}
if (_asyncDelegateImplementsScrollviewDidScroll) {
[_asyncDelegate scrollViewDidScroll:scrollView];