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ASSupplementaryNodeSource.h
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42 lines (34 loc) · 1.25 KB
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//
// ASSupplementaryNodeSource.h
// AsyncDisplayKit
//
// Created by Adlai Holler on 1/19/17.
// Copyright © 2017 Facebook. All rights reserved.
//
#import <Foundation/Foundation.h>
#import <AsyncDisplayKit/ASBlockTypes.h>
#import <AsyncDisplayKit/ASDimension.h>
NS_ASSUME_NONNULL_BEGIN
@protocol ASSupplementaryNodeSource <NSObject>
/**
* A method to provide the node-block for the supplementary element.
*
* @param elementKind The kind of supplementary element.
* @param index The index of the item.
* @return A node block for the supplementary element.
* @see collectionNode:nodeForSupplementaryElementOfKind:atIndexPath:
*/
- (ASCellNodeBlock)nodeBlockForSupplementaryElementOfKind:(NSString *)elementKind atIndex:(NSInteger)index;
@optional
/**
* A method to provide the size range used for measuring the supplementary
* element of the given kind at the given index.
*
* @param elementKind The kind of supplementary element.
* @param index The index of the item.
* @return A size range used for asynchronously measuring the node.
* @see collectionNode:constrainedSizeForSupplementaryElementOfKind:atIndexPath:
*/
- (ASSizeRange)sizeRangeForSupplementaryElementOfKind:(NSString *)elementKind atIndex:(NSInteger)index;
@end
NS_ASSUME_NONNULL_END