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3164d8d013
* Add _ASCollectionReusableView container for ASCollectionNode supplementary nodes with applyLayoutAttributes support • Adds support for -[ASCellNode applyLayoutAttributes:] to supplementary nodes * Ensure _ASCollectionReusableView has layoutAttributes if the collection view doesn’t set them * Use correct layoutAttributes accessor for supplementary elements
83 lines
2.0 KiB
Objective-C
83 lines
2.0 KiB
Objective-C
//
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// _ASCollectionReusableView.m
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// AsyncDisplayKit
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//
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// Created by Phil Larson on 4/10/17.
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// Copyright © 2017 Facebook. All rights reserved.
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//
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#import "_ASCollectionReusableView.h"
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#import "ASCellNode+Internal.h"
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#import <AsyncDisplayKit/AsyncDisplayKit.h>
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@implementation _ASCollectionReusableView
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- (void)setNode:(ASCellNode *)node
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{
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ASDisplayNodeAssertMainThread();
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node.layoutAttributes = _layoutAttributes;
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_node = node;
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}
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- (void)setLayoutAttributes:(UICollectionViewLayoutAttributes *)layoutAttributes
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{
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_layoutAttributes = layoutAttributes;
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_node.layoutAttributes = layoutAttributes;
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}
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- (void)prepareForReuse
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{
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self.layoutAttributes = nil;
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// Need to clear node pointer before UIKit calls setSelected:NO / setHighlighted:NO on its cells
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self.node = nil;
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[super prepareForReuse];
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}
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/**
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* In the initial case, this is called by UICollectionView during cell dequeueing, before
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* we get a chance to assign a node to it, so we must be sure to set these layout attributes
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* on our node when one is next assigned to us in @c setNode: . Since there may be cases when we _do_ already
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* have our node assigned e.g. during a layout update for existing cells, we also attempt
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* to update it now.
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*/
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- (void)applyLayoutAttributes:(UICollectionViewLayoutAttributes *)layoutAttributes
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{
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self.layoutAttributes = layoutAttributes;
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}
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/**
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* Keep our node filling our content view.
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*/
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- (void)layoutSubviews
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{
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[super layoutSubviews];
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self.node.frame = self.bounds;
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}
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@end
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/**
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* A category that makes _ASCollectionReusableView conform to IGListBindable.
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*
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* We don't need to do anything to bind the view model – the cell node
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* serves the same purpose.
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*/
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#if __has_include(<IGListKit/IGListBindable.h>)
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#import <IGListKit/IGListBindable.h>
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@interface _ASCollectionReusableView (IGListBindable) <IGListBindable>
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@end
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@implementation _ASCollectionReusableView (IGListBindable)
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- (void)bindViewModel:(id)viewModel
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{
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// nop
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}
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@end
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#endif
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