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105 lines
3.6 KiB
Objective-C
105 lines
3.6 KiB
Objective-C
/* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import <UIKit/UIKit.h>
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#import <AsyncDisplayKit/ASRangeController.h>
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#import <AsyncDisplayKit/ASCollectionViewProtocols.h>
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@class ASCellNode;
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@protocol ASCollectionViewDataSource;
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@protocol ASCollectionViewDelegate;
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/**
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* Node-based collection view.
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*
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* ASCollectionView is a version of UICollectionView that uses nodes -- specifically, ASCellNode subclasses -- with asynchronous
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* pre-rendering instead of synchronously loading UICollectionViewCells.
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*/
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@interface ASCollectionView : UICollectionView
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@property (nonatomic, weak) id<ASCollectionViewDataSource> asyncDataSource;
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@property (nonatomic, weak) id<ASCollectionViewDelegate> asyncDelegate;
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/**
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* Tuning parameters for the working range.
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*
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* Defaults to a trailing buffer of one screenful and a leading buffer of two screenfuls.
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*/
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@property (nonatomic, assign) ASRangeTuningParameters rangeTuningParameters;
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/**
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* Reload everything from scratch, destroying the working range and all cached nodes.
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*
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* @warning This method is substantially more expensive than UICollectionView's version.
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*/
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- (void)reloadData;
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/**
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* WARNING: ASCollectionView's update/editing support is not yet implemented. Use of these methods will fire an assertion.
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*
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* This initial version of ASCollectionView only supports appending nodes (see below). If you'd like to see full-fledged
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* support for data source updates and interactive editing, please file a GitHub issue -- AsyncDisplayKit can do it,
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* we just haven't built it out yet. :]
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*/
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//- (void)insertSections:(NSIndexSet *)sections;
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//- (void)deleteSections:(NSIndexSet *)sections;
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//- (void)reloadSections:(NSIndexSet *)sections;
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//- (void)moveSection:(NSInteger)section toSection:(NSInteger)newSection;
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//
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//- (void)insertItemsAtIndexPaths:(NSArray *)indexPaths;
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//- (void)deleteItemsAtIndexPaths:(NSArray *)indexPaths;
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//- (void)reloadItemsAtIndexPaths:(NSArray *)indexPaths;
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//- (void)moveItemAtIndexPath:(NSIndexPath *)indexPath toIndexPath:(NSIndexPath *)newIndexPath;
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/**
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* Append nodes.
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*
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* As with UICollectionView, the asyncDataSource must be updated to reflect the new nodes before this method is called.
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*
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* @param indexPaths Ordered array of index paths corresponding to the nodes to be added.
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*/
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- (void)appendNodesWithIndexPaths:(NSArray *)indexPaths;
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@end
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/**
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* This is a node-based UICollectionViewDataSource.
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*/
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@protocol ASCollectionViewDataSource <ASCommonCollectionViewDataSource, NSObject>
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/**
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* Similar to -collectionView:cellForItemAtIndexPath:.
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*
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* @param collection The sender.
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*
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* @param indexPath The index path of the requested node.
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*
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* @returns a node for display at this indexpath. Must be thread-safe (can be called on the main thread or a background
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* queue) and should not implement reuse (it will be called once per row). Unlike UICollectionView's version, this method
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* is not called when the row is about to display.
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*/
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- (ASCellNode *)collectionView:(ASCollectionView *)collectionView nodeForItemAtIndexPath:(NSIndexPath *)indexPath;
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@end
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/**
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* This is a node-based UICollectionViewDelegate.
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*/
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@protocol ASCollectionViewDelegate <ASCommonCollectionViewDelegate, NSObject>
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@optional
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- (void)collectionView:(UICollectionView *)collectionView willDisplayNodeForItemAtIndexPath:(NSIndexPath *)indexPath;
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- (void)collectionView:(UICollectionView *)collectionView didEndDisplayingNodeForItemAtIndexPath:(NSIndexPath*)indexPath;
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@end
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