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Implement simple horizontal paging node
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Levi McCallum
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Dec 17, 2015
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,29 @@ | ||
| // | ||
| // ASPagerNode.h | ||
| // AsyncDisplayKit | ||
| // | ||
| // Created by Levi McCallum on 12/7/15. | ||
| // Copyright © 2015 Facebook. All rights reserved. | ||
| // | ||
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| #import <AsyncDisplayKit/AsyncDisplayKit.h> | ||
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| @protocol ASPagerNodeDataSource; | ||
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| @interface ASPagerNode : ASCollectionNode | ||
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| @property (weak, nonatomic) id<ASPagerNodeDataSource> dataSource; | ||
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| - (void)reloadData; | ||
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| - (void)setTuningParameters:(ASRangeTuningParameters)tuningParameters forRangeType:(ASLayoutRangeType)rangeType; | ||
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| @end | ||
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| @protocol ASPagerNodeDataSource <NSObject> | ||
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| - (NSInteger)numberOfPagesInPagerNode:(ASPagerNode *)pagerNode; | ||
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| - (ASCellNode *)pagerNode:(ASPagerNode *)pagerNode nodeAtIndex:(NSInteger)index; | ||
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| @end |
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| @@ -0,0 +1,72 @@ | ||
| // | ||
| // ASPagerNode.m | ||
| // AsyncDisplayKit | ||
| // | ||
| // Created by Levi McCallum on 12/7/15. | ||
| // Copyright © 2015 Facebook. All rights reserved. | ||
| // | ||
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| #import "ASPagerNode.h" | ||
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| @interface ASPagerNode () <ASCollectionViewDataSource, ASCollectionViewDelegateFlowLayout> { | ||
| UICollectionViewFlowLayout *_flowLayout; | ||
| } | ||
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| @end | ||
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| @implementation ASPagerNode | ||
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| - (instancetype)init | ||
| { | ||
| _flowLayout = [[UICollectionViewFlowLayout alloc] init]; | ||
| _flowLayout.scrollDirection = UICollectionViewScrollDirectionHorizontal; | ||
| _flowLayout.minimumInteritemSpacing = 0; | ||
| _flowLayout.minimumLineSpacing = 0; | ||
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| self = [super initWithCollectionViewLayout:_flowLayout]; | ||
| if (self != nil) { | ||
| self.view.asyncDataSource = self; | ||
| self.view.asyncDelegate = self; | ||
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| self.view.pagingEnabled = YES; | ||
| self.view.allowsSelection = NO; | ||
| self.view.showsVerticalScrollIndicator = NO; | ||
| self.view.showsHorizontalScrollIndicator = NO; | ||
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| ASRangeTuningParameters tuningParams = { .leadingBufferScreenfuls = 1.0, .trailingBufferScreenfuls = 1.0 }; | ||
| [self setTuningParameters:tuningParams forRangeType:ASLayoutRangeTypePreload]; | ||
| [self setTuningParameters:tuningParams forRangeType:ASLayoutRangeTypeRender]; | ||
| } | ||
| return self; | ||
| } | ||
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| - (void)reloadData | ||
| { | ||
| [self.view reloadData]; | ||
| } | ||
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| - (void)setTuningParameters:(ASRangeTuningParameters)tuningParameters forRangeType:(ASLayoutRangeType)rangeType | ||
| { | ||
| [self.view setTuningParameters:tuningParameters forRangeType:rangeType]; | ||
| } | ||
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| #pragma mark - ASCollectionViewDataSource | ||
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| - (ASCellNode *)collectionView:(ASCollectionView *)collectionView nodeForItemAtIndexPath:(NSIndexPath *)indexPath | ||
| { | ||
| ASDisplayNodeAssert(self.dataSource != nil, @"ASPagerNode must have a data source to load paging nodes"); | ||
| return [self.dataSource pagerNode:self nodeAtIndex:indexPath.item]; | ||
| } | ||
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| - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section | ||
| { | ||
| ASDisplayNodeAssert(self.dataSource != nil, @"ASPagerNode must have a data source to load paging nodes"); | ||
| return [self.dataSource numberOfPagesInPagerNode:self]; | ||
| } | ||
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| - (ASSizeRange)collectionView:(ASCollectionView *)collectionView constrainedSizeForNodeAtIndexPath:(NSIndexPath *)indexPath | ||
| { | ||
| return ASSizeRangeMake(CGSizeZero, self.view.bounds.size); | ||
| } | ||
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| @end |
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| source 'https://github.com/CocoaPods/Specs.git' | ||
| platform :ios, '8.0' | ||
| pod 'AsyncDisplayKit', :path => '../..' |
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