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AsyncDisplayKit/AsyncDisplayKit/ASCollectionView.h at master · phatmann/AsyncDisplayKit · GitHub
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/*
Copyright (c) 2014-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#
import
<
UIKit/UIKit.h
>
#
import
<
AsyncDisplayKit/ASRangeController.h
>
#
import
<
AsyncDisplayKit/ASCollectionViewProtocols.h
>
@class
ASCellNode;
@protocol
ASCollectionViewDataSource;
@protocol
ASCollectionViewDelegate;
/*
*
* Node-based collection view.
*
* ASCollectionView is a version of UICollectionView that uses nodes -- specifically, ASCellNode subclasses -- with asynchronous
* pre-rendering instead of synchronously loading UICollectionViewCells.
*/
@interface
ASCollectionView
:
UICollectionView
@property
(
nonatomic
,
weak
)
id
<ASCollectionViewDataSource> asyncDataSource;
@property
(
nonatomic
,
weak
)
id
<ASCollectionViewDelegate> asyncDelegate;
/*
*
* Tuning parameters for the working range.
*
* Defaults to a trailing buffer of one screenful and a leading buffer of two screenfuls.
*/
@property
(
nonatomic
,
assign
) ASRangeTuningParameters rangeTuningParameters;
/*
*
* Reload everything from scratch, destroying the working range and all cached nodes.
*
* @warning This method is substantially more expensive than UICollectionView's version.
*/
- (
void
)
reloadData
;
/*
*
* Section updating.
*
* All operations are asynchronous and thread safe. You can call it from background thread (it is recommendated) and the UI table
* view will be updated asynchronously. The asyncDataSource must be updated to reflect the changes before these methods are called.
*/
- (
void
)
insertSections
:
(
NSIndexSet
*)
sections
;
- (
void
)
deleteSections
:
(
NSIndexSet
*)
sections
;
- (
void
)
reloadSections
:
(
NSIndexSet
*)
sections
;
- (
void
)
moveSection
:
(
NSInteger
)
section
toSection
:
(
NSInteger
)
newSection
;
/*
*
* Items updating.
*
* All operations are asynchronous and thread safe. You can call it from background thread (it is recommendated) and the UI table
* view will be updated asynchronously. The asyncDataSource must be updated to reflect the changes before these methods are called.
*/
- (
void
)
insertItemsAtIndexPaths
:
(
NSArray
*)
indexPaths
;
- (
void
)
deleteItemsAtIndexPaths
:
(
NSArray
*)
indexPaths
;
- (
void
)
reloadItemsAtIndexPaths
:
(
NSArray
*)
indexPaths
;
- (
void
)
moveItemAtIndexPath
:
(
NSIndexPath
*)
indexPath
toIndexPath
:
(
NSIndexPath
*)
newIndexPath
;
/*
*
* Similar to -cellForItemAtIndexPath:.
*
* @param indexPath The index path of the requested node.
*
* @returns a node for display at this indexpath.
*/
- (ASCellNode *)
nodeForItemAtIndexPath
:
(
NSIndexPath
*)
indexPath
;
/*
*
* Similar to -visibleCells.
*
* @returns an array containing the nodes being displayed on screen.
*/
- (
NSArray
*)
visibleNodes
;
/*
*
* Query the sized node at `indexPath` for its calculatedSize.
*
* @param indexPath The index path for the node of interest.
*/
- (CGSize)
calculatedSizeForNodeAtIndexPath
:
(
NSIndexPath
*)
indexPath
;
@end
/*
*
* This is a node-based UICollectionViewDataSource.
*/
@protocol
ASCollectionViewDataSource
<ASCommonCollectionViewDataSource,
NSObject
>
/*
*
* Similar to -collectionView:cellForItemAtIndexPath:.
*
* @param collection The sender.
*
* @param indexPath The index path of the requested node.
*
* @returns a node for display at this indexpath. Must be thread-safe (can be called on the main thread or a background
* queue) and should not implement reuse (it will be called once per row). Unlike UICollectionView's version, this method
* is not called when the row is about to display.
*/
- (ASCellNode *)
collectionView
:
(ASCollectionView *)
collectionView
nodeForItemAtIndexPath
:
(
NSIndexPath
*)
indexPath
;
@end
/*
*
* This is a node-based UICollectionViewDelegate.
*/
@protocol
ASCollectionViewDelegate
<ASCommonCollectionViewDelegate,
NSObject
>
@optional
- (
void
)
collectionView
:
(ASCollectionView *)
collectionView
willDisplayNodeForItemAtIndexPath
:
(
NSIndexPath
*)
indexPath
;
- (
void
)
collectionView
:
(ASCollectionView *)
collectionView
didEndDisplayingNodeForItemAtIndexPath
:
(
NSIndexPath
*)
indexPath
;
@end
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