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Improvements for automatic range mode

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- Only update range mode if visibility changes if the node is not range controlled
- Only change explicitly set range mode if ASRangeController becomes visible
- Return interface state for range controller in ASCollectionView and ASTableView based on if the containing node is range managed
This commit is contained in:
Michael Schneider
2016-03-15 13:38:46 -07:00
parent b30fa8b2f6
commit d3ba80ccfd
6 changed files with 59 additions and 25 deletions
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22
AsyncDisplayKit/ASCollectionView.mm
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@@ -918,14 +918,15 @@ static NSString * const kCellReuseIdentifier = @"_ASCollectionViewCell";
- (ASInterfaceState)interfaceStateForRangeController:(ASRangeController *)rangeController
{
ASCollectionNode *collectionNode = self.collectionNode;
if (collectionNode) {
if (collectionNode && [collectionNode supportsRangeManagedInterfaceState]) {
// Only use the interfaceStatate of nodes that are range managed
return collectionNode.interfaceState;
} else {
// Until we can always create an associated ASCollectionNode without a retain cycle,
// we might be on our own to try to guess if we're visible. The node normally
// handles this even if it is the root / directly added to the view hierarchy.
return (self.window != nil ? ASInterfaceStateVisible : ASInterfaceStateNone);
}
// For not range managed nodes or until we can always create an associated ASCollectionNode
// without a retain cycle, we might be on our own to try to guess if we're visible. The node normally
// handles this even if it is the root / directly added to the view hierarchy.
return (self.window != nil ? ASInterfaceStateVisible : ASInterfaceStateNone);
}
- (NSArray *)rangeController:(ASRangeController *)rangeController nodesAtIndexPaths:(NSArray *)indexPaths
@@ -1144,9 +1145,12 @@ static NSString * const kCellReuseIdentifier = @"_ASCollectionViewCell";
if (!visible && node.inHierarchy) {
[node __exitHierarchy];
}
// Trigger updating interfaceState for cells in case ASCollectionView becomes visible or invisible
[_rangeController visibleNodeIndexPathsDidChangeWithScrollDirection:self.scrollDirection];
// Updating the visible node index paths only for range managed nodes. Not range managed nodes will get their
// their update in the layout pass
if (![node supportsRangeManagedInterfaceState]) {
[_rangeController visibleNodeIndexPathsDidChangeWithScrollDirection:self.scrollDirection];
}
}
#pragma mark - UICollectionView dead-end intercepts