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[ASTableNode] expose ASTableView's -visibleNodes (#2449)

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* expose ASTableView's -visibleNodes getter at the ASTableNode level

* add safegaurds

* make visibleNodes a read only property for ASTableNode

* make collectionNode .visibleNodes property
This commit is contained in:
Hannah Troisi 2016-10-24 09:42:04 -07:00 committed by Adlai Holler
parent 3638feffd4
commit 97e23776e4
4 changed files with 17 additions and 3 deletions
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4
AsyncDisplayKit/ASCollectionNode.h
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@ -335,9 +335,9 @@ NS_ASSUME_NONNULL_BEGIN
/** /**
* Similar to -visibleCells. * Similar to -visibleCells.
* *
* @return an array containing the nodes being displayed on screen. * @return an array containing the nodes being displayed on screen. This must be called on the main thread.
*/ */
- (NSArray<__kindof ASCellNode *> *)visibleNodes AS_WARN_UNUSED_RESULT; @property(readonly, copy) NSArray<__kindof ASCellNode *> *visibleNodes;
/** /**
* Retrieves the node for the item at the given index path. * Retrieves the node for the item at the given index path.

3
AsyncDisplayKit/ASCollectionNode.mm
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@ -349,7 +349,8 @@
- (NSArray<__kindof ASCellNode *> *)visibleNodes - (NSArray<__kindof ASCellNode *> *)visibleNodes
{ {
return [self.view visibleNodes]; ASDisplayNodeAssertMainThread();
return self.isNodeLoaded ? [self.view visibleNodes] : @[];
} }
- (NSIndexPath *)indexPathForNode:(ASCellNode *)cellNode - (NSIndexPath *)indexPathForNode:(ASCellNode *)cellNode

7
AsyncDisplayKit/ASTableNode.h
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@ -339,6 +339,13 @@ NS_ASSUME_NONNULL_BEGIN
*/ */
- (NSInteger)tableNode:(ASTableNode *)tableNode numberOfRowsInSection:(NSInteger)section; - (NSInteger)tableNode:(ASTableNode *)tableNode numberOfRowsInSection:(NSInteger)section;
/**
* Similar to -visibleCells.
*
* @return an array containing the nodes being displayed on screen. This must be called on the main thread.
*/
@property(readonly, copy) NSArray<__kindof ASCellNode *> *visibleNodes;
/** /**
* Asks the data source for a block to create a node to represent the row at the given index path. * Asks the data source for a block to create a node to represent the row at the given index path.
* The block will be run by the table node concurrently in the background before the row is inserted * The block will be run by the table node concurrently in the background before the row is inserted

6
AsyncDisplayKit/ASTableNode.mm
View File

@ -371,6 +371,12 @@ ASEnvironmentCollectionTableSetEnvironmentState(_environmentStateLock)
return [self.dataController numberOfSections]; return [self.dataController numberOfSections];
} }
- (NSArray<__kindof ASCellNode *> *)visibleNodes
{
ASDisplayNodeAssertMainThread();
return self.isNodeLoaded ? [self.view visibleNodes] : @[];
}
- (NSIndexPath *)indexPathForNode:(ASCellNode *)cellNode - (NSIndexPath *)indexPathForNode:(ASCellNode *)cellNode
{ {
return [self.dataController indexPathForNode:cellNode]; return [self.dataController indexPathForNode:cellNode];