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# Conflicts: # AsyncDisplayKit.xcodeproj/project.pbxproj # AsyncDisplayKit/ASPagerFlowLayout.m # AsyncDisplayKit/AsyncDisplayKit.modulemap # AsyncDisplayKit/Details/ASCollectionDataController.h # AsyncDisplayKit/Details/ASCollectionDataController.mm # AsyncDisplayKit/Details/ASDataController.mm # AsyncDisplayKit/Private/ASDataController+Subclasses.h # AsyncDisplayKit/module.modulemap # Source/Debug/AsyncDisplayKit+Debug.h # Source/Details/ASCollectionElement.mm # Source/module.modulemap
72 lines
2.3 KiB
Objective-C
72 lines
2.3 KiB
Objective-C
//
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// ASSectionController.h
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// AsyncDisplayKit
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//
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// Created by Adlai Holler on 1/19/17.
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// Copyright © 2017 Facebook. All rights reserved.
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//
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#ifndef MINIMAL_ASDK
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#import <Foundation/Foundation.h>
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NS_ASSUME_NONNULL_BEGIN
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/**
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* A protocol that your section controllers should conform to,
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* in addition to IGListSectionType, in order to be used with AsyncDisplayKit.
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*
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* @note Your supplementary view source should conform to @c ASSupplementaryNodeSource.
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*/
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@protocol ASSectionController <NSObject>
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/**
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* A method to provide the node block for the item at the given index.
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* The node block you return will be run asynchronously off the main thread,
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* so it's important to retrieve any objects from your section _outside_ the block
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* because by the time the block is run, the array may have changed.
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*
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* @param index The index of the item.
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* @return A block to be run concurrently to build the node for this item.
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* @see collectionNode:nodeBlockForItemAtIndexPath:
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*/
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- (ASCellNodeBlock)nodeBlockForItemAtIndex:(NSInteger)index;
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@optional
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/**
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* Asks the section controller whether it should batch fetch because the user is
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* near the end of the current data set.
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*
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* @discussion Use this method to conditionally fetch batches. Example use cases are: limiting the total number of
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* objects that can be fetched or no network connection.
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*
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* If not implemented, the assumed return value is @c YES.
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*/
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- (BOOL)shouldBatchFetch;
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/**
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* Asks the section controller to begin fetching more content (tail loading) because
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* the user is near the end of the current data set.
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*
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* @param context A context object that must be notified when the batch fetch is completed.
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*
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* @discussion You must eventually call -completeBatchFetching: with an argument of YES in order to receive future
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* notifications to do batch fetches. This method is called on a background queue.
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*/
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- (void)beginBatchFetchWithContext:(ASBatchContext *)context;
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/**
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* A method to provide the size range used for measuring the item
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* at the given index.
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*
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* @param index The index of the item.
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* @return A size range used for asynchronously measuring the node at this index.
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* @see collectionNode:constrainedSizeForItemAtIndexPath:
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*/
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- (ASSizeRange)sizeRangeForItemAtIndex:(NSInteger)index;
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@end
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NS_ASSUME_NONNULL_END
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#endif
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