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345 lines
9.0 KiB
HTML
345 lines
9.0 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>ASCollectionViewDelegate Protocol Reference</title>
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<body class="appledoc">
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<h1 id="library-title">
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<a href="../index.html">AsyncDisplayKit </a>
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<a href="../index.html">Facebook</a>
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<li><a href="../hierarchy.html">Hierarchy</a></li>
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On This Page
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<option value="top">Jump To…</option>
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<option value="overview">Overview</option>
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<option value="tasks">Tasks</option>
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<optgroup label="Instance Methods">
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<option value="//api/name/collectionView:layout:insetForSectionAtIndex:">- collectionView:layout:insetForSectionAtIndex:</option>
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<option value="//api/name/collectionView:willBeginBatchFetchWithContext:">- collectionView:willBeginBatchFetchWithContext:</option>
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<option value="//api/name/shouldBatchFetchForCollectionView:">- shouldBatchFetchForCollectionView:</option>
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</optgroup>
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<article>
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<div id="overview_contents" class="container">
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<div id="content">
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<main role="main">
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<h1 class="title">ASCollectionViewDelegate Protocol Reference</h1>
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<div class="section section-specification"><table cellspacing="0"><tbody>
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<tr>
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<th>Conforms to</th>
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<td><a href="../Protocols/ASCommonCollectionViewDelegate.html">ASCommonCollectionViewDelegate</a><br />NSObject</td>
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</tr><tr>
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<th>Declared in</th>
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<td>ASCollectionView.h</td>
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</tr>
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</tbody></table></div>
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<div class="section section-overview">
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<a title="Overview" name="overview"></a>
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<h2 class="subtitle subtitle-overview">Overview</h2>
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<p>This is a node-based UICollectionViewDelegate.</p>
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</div>
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<div class="section section-tasks">
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<a title="Tasks" name="tasks"></a>
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<div class="task-list">
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<div class="section-method">
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<a name="//api/name/collectionView:willBeginBatchFetchWithContext:" title="collectionView:willBeginBatchFetchWithContext:"></a>
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<h3 class="method-title"><code><a href="#//api/name/collectionView:willBeginBatchFetchWithContext:">– collectionView:willBeginBatchFetchWithContext:</a></code>
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</h3>
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<div class="method-info">
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<div class="pointy-thing"></div>
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<div class="method-info-container">
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<div class="method-subsection brief-description">
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<p>Receive a message that the collectionView is near the end of its data set and more data should be fetched if
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necessary.</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (void)collectionView:(ASCollectionView *)<em>collectionView</em> willBeginBatchFetchWithContext:(ASBatchContext *)<em>context</em></code></div>
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<div class="method-subsection arguments-section parameters">
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<h4 class="method-subtitle parameter-title">Parameters</h4>
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<table class="argument-def parameter-def">
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<tr>
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<th scope="row" class="argument-name"><code>collectionView</code></th>
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<td><p>The sender.</p></td>
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</tr>
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<tr>
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<th scope="row" class="argument-name"><code>context</code></th>
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<td><p>A context object that must be notified when the batch fetch is completed.</p></td>
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</tr>
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</table>
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</div>
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<div class="method-subsection discussion-section">
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<h4 class="method-subtitle">Discussion</h4>
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<p>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.</p>
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<p>UICollectionView currently only supports batch events for tail loads. If you require a head load, consider
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implementing a UIRefreshControl.</p>
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</div>
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<div class="method-subsection declared-in-section">
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<h4 class="method-subtitle">Declared In</h4>
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<p><code class="declared-in-ref">ASCollectionView.h</code></p>
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</div>
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</div>
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</div>
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</div><div class="section-method">
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<a name="//api/name/shouldBatchFetchForCollectionView:" title="shouldBatchFetchForCollectionView:"></a>
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<h3 class="method-title"><code><a href="#//api/name/shouldBatchFetchForCollectionView:">– shouldBatchFetchForCollectionView:</a></code>
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</h3>
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<div class="method-info">
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<div class="pointy-thing"></div>
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<div class="method-info-container">
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<div class="method-subsection brief-description">
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<p>Tell the collectionView if batch fetching should begin.</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (BOOL)shouldBatchFetchForCollectionView:(ASCollectionView *)<em>collectionView</em></code></div>
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<div class="method-subsection arguments-section parameters">
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<h4 class="method-subtitle parameter-title">Parameters</h4>
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<table class="argument-def parameter-def">
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<tr>
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<th scope="row" class="argument-name"><code>collectionView</code></th>
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<td><p>The sender.</p></td>
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</tr>
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</table>
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</div>
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<div class="method-subsection discussion-section">
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<h4 class="method-subtitle">Discussion</h4>
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<p>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.</p>
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<p>If not implemented, the collectionView assumes that it should notify its asyncDelegate when batch fetching
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should occur.</p>
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</div>
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<div class="method-subsection declared-in-section">
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<h4 class="method-subtitle">Declared In</h4>
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<p><code class="declared-in-ref">ASCollectionView.h</code></p>
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</div>
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</div>
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</div>
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</div><div class="section-method">
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<a name="//api/name/collectionView:layout:insetForSectionAtIndex:" title="collectionView:layout:insetForSectionAtIndex:"></a>
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<h3 class="method-title"><code><a href="#//api/name/collectionView:layout:insetForSectionAtIndex:">– collectionView:layout:insetForSectionAtIndex:</a></code>
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</h3>
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<div class="method-info">
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<div class="pointy-thing"></div>
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<div class="method-info-container">
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<div class="method-subsection brief-description">
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<p>Passthrough support to UICollectionViewDelegateFlowLayout sectionInset behavior.</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (UIEdgeInsets)collectionView:(UICollectionView *)<em>collectionView</em> layout:(UICollectionViewLayout *)<em>collectionViewLayout</em> insetForSectionAtIndex:(NSInteger)<em>section</em></code></div>
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<div class="method-subsection arguments-section parameters">
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<h4 class="method-subtitle parameter-title">Parameters</h4>
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<table class="argument-def parameter-def">
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<tr>
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<th scope="row" class="argument-name"><code>collectionView</code></th>
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<td><p>The sender.</p></td>
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</tr>
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<tr>
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<th scope="row" class="argument-name"><code>collectionViewLayout</code></th>
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<td><p>The layout object requesting the information.</p></td>
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</tr>
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<tr>
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<th scope="row" class="argument-name"><code>section</code></th>
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<td><p>The index number of the section whose insets are needed.</p></td>
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</tr>
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</table>
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</div>
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<div class="method-subsection discussion-section">
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<h4 class="method-subtitle">Discussion</h4>
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<p>The same rules apply as the UICollectionView implementation, but this can also be used without a UICollectionViewFlowLayout.
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https://developer.apple.com/library/ios/documentation/UIKit/Reference/UICollectionViewDelegateFlowLayout_protocol/index.html#//apple_ref/occ/intfm/UICollectionViewDelegateFlowLayout/collectionView:layout:insetForSectionAtIndex:</p>
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</div>
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<div class="method-subsection declared-in-section">
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<h4 class="method-subtitle">Declared In</h4>
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<p><code class="declared-in-ref">ASCollectionView.h</code></p>
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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</main>
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<footer>
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<div class="footer-copyright">
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<p class="copyright">Copyright © 2015 Facebook. All rights reserved. Updated: 2015-09-16</p>
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<p class="generator">Generated by <a href="http://appledoc.gentlebytes.com">appledoc 2.2.1 (build 1333)</a>.</p>
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