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Swiftgram/_site/docs/containers-aspagernode.html
Hannah Troisi 1b3ca72877 Fix preexisting code - missing super call
2016-04-17 22:49:14 -07:00

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<title>AsyncDisplayKit | ASPagerNode</title>
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Subclassing
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Layout Engine
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ASViewController
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ASTableNode
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ASCollectionNode
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ASPagerNode
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<h3>Nodes</h3>
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ASDisplayNode
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ASCellNode
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ASTextCellNode
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ASControlNode
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ASButtonNode
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ASTextNode
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ASEditableTextNode
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ASImageNode
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ASNetworkImageNode
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ASMapNode
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ASVideoNode
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ASScrollNode
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Layout Basics
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Layout Containers
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Synchronous Concurrency
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Subtree Rasterization
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Drawing Priority
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Hit Test Slop
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Image Modification Blocks
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Placeholder Fade Duration
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Image Scaling
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Hit Test Visualization
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Range Visualization
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<article class='withtoc'>
<h1>
ASPagerNode
<a class="edit-page-link" href="https://github.com/facebook/asyncdisplaykit/tree/gh-pages/_docs/containers-aspagernode.md" target="_blank">Edit on GitHub</a>
</h1>
<p></p>
<p>ASPagerNode is a specialized subclass of ASCollectionNode. Using it allows you to produce a page style UI similar to what you&#39;d create with a UIPageViewController with UIKit. Luckily, the API is quite a bit simpler than UIPageViewController&#39;s.</p>
<p>The main dataSource methods are:</p>
<p><code>- (NSInteger)numberOfPagesInPagerNode:(ASPagerNode *)pagerNode</code></p>
<p>and </p>
<p><code>- (ASCellNode *)pagerNode:(ASPagerNode *)pagerNode nodeAtIndex:(NSInteger)index</code></p>
<p>or</p>
<p><code>- (ASCellNodeBlock)pagerNode:(ASPagerNode *)pagerNode nodeBlockAtIndex:(NSInteger)index</code></p>
<p>These two methods, just as with ASCollectionNode and ASTableNode need to return either an ASCellNode or an block it can use to return one later. </p>
<p>One especially useful pattern is to return an ASCellNode that is initialized with an existing UIViewController or ASViewController.</p>
<div class="highlight"><pre><code class="language-text" data-lang="text">- (ASCellNode *)pagerNode:(ASPagerNode *)pagerNode nodeAtIndex:(NSInteger)index
{
CGSize pagerNodeSize = pagerNode.bounds.size;
NSArray *animals = self.animals[index];
ASCellNode *node = [[ASCellNode alloc] initWithViewControllerBlock:^{
return [[AnimalTableNodeController alloc] initWithAnimals:animals];;
} didLoadBlock:nil];
node.preferredFrameSize = pagerNodeSize;
return node;
}
</code></pre></div>
<p>In this example, you can see that the node is constructed using the <code>-initWithViewControllerBlock:</code> method. It is usually necessary to provide a cell created this way with a preferredFrameSize so that it can be laid out correctly.</p>
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