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Adding visibility monitoring for ASTableVieww

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This commit is contained in:
Max Gu
2016-02-19 22:15:44 -08:00
parent 382509fac8
commit 115fc2b3da
5 changed files with 34 additions and 11 deletions
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29
AsyncDisplayKit/ASTableView.mm
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@@ -112,6 +112,8 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
BOOL _queuedNodeHeightUpdate;
BOOL _isDeallocating;
BOOL _dataSourceImplementsNodeBlockForRowAtIndexPath;
BOOL _asyncDelegateImplementsScrollviewDidScroll;
NSMutableSet *_cellsForVisibilityUpdates;
}
@property (atomic, assign) BOOL asyncDataSourceLocked;
@@ -197,7 +199,7 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
if (!(self = [super initWithFrame:frame style:style])) {
return nil;
}
_cellsForVisibilityUpdates = [NSMutableSet set];
if (!dataControllerClass) {
dataControllerClass = [[self class] dataControllerClass];
}
@@ -585,7 +587,18 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
return direction;
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
for (_ASTableViewCell *tableCell in _cellsForVisibilityUpdates) {
ASCellNode *node = [tableCell node];
[node visibleNodeDidScroll:scrollView withCellFrame:tableCell.frame];
}
if (_asyncDelegateImplementsScrollviewDidScroll) {
[_asyncDelegate scrollViewDidScroll:scrollView];
}
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(_ASTableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
_pendingVisibleIndexPath = indexPath;
@@ -595,13 +608,17 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
[_asyncDelegate tableView:self willDisplayNodeForRowAtIndexPath:indexPath];
}
ASCellNode *cellNode = [self nodeForRowAtIndexPath:indexPath];
ASCellNode *cellNode = [cell node];
if (ASSubclassOverridesSelector([ASCellNode class], [cellNode class], @selector(visibleNodeDidScroll:withCellFrame:))) {
[_cellsForVisibilityUpdates addObject:cell];
}
if (cellNode.neverShowPlaceholders) {
[cellNode recursivelyEnsureDisplaySynchronously:YES];
}
}
- (void)tableView:(UITableView *)tableView didEndDisplayingCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath*)indexPath
- (void)tableView:(UITableView *)tableView didEndDisplayingCell:(_ASTableViewCell *)cell forRowAtIndexPath:(NSIndexPath*)indexPath
{
if ([_pendingVisibleIndexPath isEqual:indexPath]) {
_pendingVisibleIndexPath = nil;
@@ -615,6 +632,10 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
[_asyncDelegate tableView:self didEndDisplayingNode:node forRowAtIndexPath:indexPath];
}
if ([_cellsForVisibilityUpdates containsObject:cell]) {
[_cellsForVisibilityUpdates removeObject:cell];
}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
if ([_asyncDelegate respondsToSelector:@selector(tableView:didEndDisplayingNodeForRowAtIndexPath:)]) {