mirror of
https://github.com/Instagram/IGListKit
synced 2026-04-21 13:37:19 +00:00
894c34db05
Summary: ## Changes in this pull request Updates the IGListKit docs to the latest API spec in v5.2.0 ### Checklist - [x] All tests pass. Demo project builds and runs. - [x] I added tests, an experiment, or detailed why my change isn't tested. - [x] I added an entry to the `CHANGELOG.md` for any breaking changes, enhancements, or bug fixes. - [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/main/.github/CONTRIBUTING.md) Pull Request resolved: https://github.com/instagram/IGListKit/pull/1656 Reviewed By: jurmarcus Differential Revision: D93350284 Pulled By: TimOliver fbshipit-source-id: fa4276caae7309f3ef0fd78f5a0c4bcc05d9cb9f
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661 lines
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IGListDisplayDelegate Protocol Reference
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<section>
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<section class="section">
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<h1>IGListDisplayDelegate</h1>
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<div class="declaration">
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<div class="language">
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<p class="aside-title">Objective-C</p>
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<pre class="highlight objective_c"><code><span class="k">@protocol</span> <span class="nc">IGListDisplayDelegate</span> <span class="o"><</span><span class="n">NSObject</span><span class="o">></span></code></pre>
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<p class="aside-title">Swift</p>
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<pre class="highlight swift"><code><span class="kd">@MainActor</span> <span class="kd">protocol</span> <span class="kt">ListDisplayDelegate</span> <span class="p">:</span> <span class="kt">NSObjectProtocol</span></code></pre>
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</div>
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</div>
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<p>Implement this protocol to receive display events for a section controller when it is on screen.</p>
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</section>
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<section class="section task-group-section">
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<div class="task-group">
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<ul>
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<li class="item">
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<div>
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<code>
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<a name="/c:objc(pl)IGListDisplayDelegate(im)listAdapter:willDisplaySectionController:"></a>
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<a name="//apple_ref/objc/Method/-listAdapter:willDisplaySectionController:" class="dashAnchor"></a>
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<a class="token" href="#/c:objc(pl)IGListDisplayDelegate(im)listAdapter:willDisplaySectionController:">-listAdapter:<wbr>willDisplaySectionController:<wbr></a>
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</code>
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</div>
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<div class="height-container">
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<div class="pointer-container"></div>
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<section class="section">
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<div class="pointer"></div>
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<div class="abstract">
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<p>Tells the delegate that the specified section controller is about to be displayed.</p>
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</div>
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<div class="declaration">
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<h4>Declaration</h4>
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<div class="language">
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<p class="aside-title">Objective-C</p>
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<pre class="highlight objective_c"><code><span class="k">-</span> <span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="nf">listAdapter</span><span class="p">:(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/IGListAdapter.html">IGListAdapter</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">listAdapter</span>
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<span class="nf">willDisplaySectionController</span><span class="p">:</span>
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<span class="p">(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/IGListSectionController.html">IGListSectionController</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">sectionController</span><span class="p">;</span></code></pre>
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<div class="language">
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<p class="aside-title">Swift</p>
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<pre class="highlight swift"><code><span class="kd">func</span> <span class="nf">listAdapter</span><span class="p">(</span><span class="n">_</span> <span class="nv">listAdapter</span><span class="p">:</span> <span class="kt"><a href="../Classes/IGListAdapter.html">IGListAdapter</a></span><span class="p">,</span> <span class="n">willDisplay</span> <span class="nv">sectionController</span><span class="p">:</span> <span class="kt"><a href="../Classes/IGListSectionController.html">IGListSectionController</a></span><span class="p">)</span></code></pre>
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</div>
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</div>
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<div>
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<h4>Parameters</h4>
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<table class="graybox">
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<tbody>
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<tr>
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<td>
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<code>
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<em>listAdapter</em>
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</code>
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</td>
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<td>
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<div>
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<p>The list adapter for the section controller.</p>
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</div>
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</td>
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</tr>
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<tr>
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<td>
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<code>
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<em>sectionController</em>
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</code>
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|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The section controller about to be displayed.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</section>
|
|
</div>
|
|
</li>
|
|
<li class="item">
|
|
<div>
|
|
<code>
|
|
<a name="/c:objc(pl)IGListDisplayDelegate(im)listAdapter:didEndDisplayingSectionController:"></a>
|
|
<a name="//apple_ref/objc/Method/-listAdapter:didEndDisplayingSectionController:" class="dashAnchor"></a>
|
|
<a class="token" href="#/c:objc(pl)IGListDisplayDelegate(im)listAdapter:didEndDisplayingSectionController:">-listAdapter:<wbr>didEndDisplayingSectionController:<wbr></a>
|
|
</code>
|
|
</div>
|
|
<div class="height-container">
|
|
<div class="pointer-container"></div>
|
|
<section class="section">
|
|
<div class="pointer"></div>
|
|
<div class="abstract">
|
|
<p>Tells the delegate that the specified section controller is no longer being displayed.</p>
|
|
|
|
</div>
|
|
<div class="declaration">
|
|
<h4>Declaration</h4>
|
|
<div class="language">
|
|
<p class="aside-title">Objective-C</p>
|
|
<pre class="highlight objective_c"><code><span class="k">-</span> <span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="nf">listAdapter</span><span class="p">:(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/IGListAdapter.html">IGListAdapter</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">listAdapter</span>
|
|
<span class="nf">didEndDisplayingSectionController</span><span class="p">:</span>
|
|
<span class="p">(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/IGListSectionController.html">IGListSectionController</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">sectionController</span><span class="p">;</span></code></pre>
|
|
|
|
</div>
|
|
<div class="language">
|
|
<p class="aside-title">Swift</p>
|
|
<pre class="highlight swift"><code><span class="kd">func</span> <span class="nf">listAdapter</span><span class="p">(</span><span class="n">_</span> <span class="nv">listAdapter</span><span class="p">:</span> <span class="kt"><a href="../Classes/IGListAdapter.html">IGListAdapter</a></span><span class="p">,</span> <span class="n">didEndDisplaying</span> <span class="nv">sectionController</span><span class="p">:</span> <span class="kt"><a href="../Classes/IGListSectionController.html">IGListSectionController</a></span><span class="p">)</span></code></pre>
|
|
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<h4>Parameters</h4>
|
|
<table class="graybox">
|
|
<tbody>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>listAdapter</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The list adapter for the section controller.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>sectionController</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The section controller that is no longer displayed.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</section>
|
|
</div>
|
|
</li>
|
|
<li class="item">
|
|
<div>
|
|
<code>
|
|
<a name="/c:objc(pl)IGListDisplayDelegate(im)listAdapter:willDisplaySectionController:cell:atIndex:"></a>
|
|
<a name="//apple_ref/objc/Method/-listAdapter:willDisplaySectionController:cell:atIndex:" class="dashAnchor"></a>
|
|
<a class="token" href="#/c:objc(pl)IGListDisplayDelegate(im)listAdapter:willDisplaySectionController:cell:atIndex:">-listAdapter:<wbr>willDisplaySectionController:<wbr>cell:<wbr>atIndex:<wbr></a>
|
|
</code>
|
|
</div>
|
|
<div class="height-container">
|
|
<div class="pointer-container"></div>
|
|
<section class="section">
|
|
<div class="pointer"></div>
|
|
<div class="abstract">
|
|
<p>Tells the delegate that a cell in the specified list is about to be displayed.</p>
|
|
|
|
</div>
|
|
<div class="declaration">
|
|
<h4>Declaration</h4>
|
|
<div class="language">
|
|
<p class="aside-title">Objective-C</p>
|
|
<pre class="highlight objective_c"><code><span class="k">-</span> <span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="nf">listAdapter</span><span class="p">:(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/IGListAdapter.html">IGListAdapter</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">listAdapter</span>
|
|
<span class="nf">willDisplaySectionController</span><span class="p">:</span>
|
|
<span class="p">(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/IGListSectionController.html">IGListSectionController</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">sectionController</span>
|
|
<span class="nf">cell</span><span class="p">:(</span><span class="n">nonnull</span> <span class="n">UICollectionViewCell</span> <span class="o">*</span><span class="p">)</span><span class="nv">cell</span>
|
|
<span class="nf">atIndex</span><span class="p">:(</span><span class="n">NSInteger</span><span class="p">)</span><span class="nv">index</span><span class="p">;</span></code></pre>
|
|
|
|
</div>
|
|
<div class="language">
|
|
<p class="aside-title">Swift</p>
|
|
<pre class="highlight swift"><code><span class="kd">func</span> <span class="nf">listAdapter</span><span class="p">(</span><span class="n">_</span> <span class="nv">listAdapter</span><span class="p">:</span> <span class="kt"><a href="../Classes/IGListAdapter.html">IGListAdapter</a></span><span class="p">,</span> <span class="n">willDisplay</span> <span class="nv">sectionController</span><span class="p">:</span> <span class="kt"><a href="../Classes/IGListSectionController.html">IGListSectionController</a></span><span class="p">,</span> <span class="nv">cell</span><span class="p">:</span> <span class="kt">UICollectionViewCell</span><span class="p">,</span> <span class="n">at</span> <span class="nv">index</span><span class="p">:</span> <span class="kt">Int</span><span class="p">)</span></code></pre>
|
|
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<h4>Parameters</h4>
|
|
<table class="graybox">
|
|
<tbody>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>listAdapter</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The list adapter in which the cell will display.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>sectionController</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The section controller that is displaying the cell.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>cell</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The cell about to be displayed.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>index</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The index of the cell in the section.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</section>
|
|
</div>
|
|
</li>
|
|
<li class="item">
|
|
<div>
|
|
<code>
|
|
<a name="/c:objc(pl)IGListDisplayDelegate(im)listAdapter:didEndDisplayingSectionController:cell:atIndex:"></a>
|
|
<a name="//apple_ref/objc/Method/-listAdapter:didEndDisplayingSectionController:cell:atIndex:" class="dashAnchor"></a>
|
|
<a class="token" href="#/c:objc(pl)IGListDisplayDelegate(im)listAdapter:didEndDisplayingSectionController:cell:atIndex:">-listAdapter:<wbr>didEndDisplayingSectionController:<wbr>cell:<wbr>atIndex:<wbr></a>
|
|
</code>
|
|
</div>
|
|
<div class="height-container">
|
|
<div class="pointer-container"></div>
|
|
<section class="section">
|
|
<div class="pointer"></div>
|
|
<div class="abstract">
|
|
<p>Tells the delegate that a cell in the specified list is no longer being displayed.</p>
|
|
|
|
</div>
|
|
<div class="declaration">
|
|
<h4>Declaration</h4>
|
|
<div class="language">
|
|
<p class="aside-title">Objective-C</p>
|
|
<pre class="highlight objective_c"><code><span class="k">-</span> <span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="nf">listAdapter</span><span class="p">:(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/IGListAdapter.html">IGListAdapter</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">listAdapter</span>
|
|
<span class="nf">didEndDisplayingSectionController</span><span class="p">:</span>
|
|
<span class="p">(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/IGListSectionController.html">IGListSectionController</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">sectionController</span>
|
|
<span class="nf">cell</span><span class="p">:(</span><span class="n">nonnull</span> <span class="n">UICollectionViewCell</span> <span class="o">*</span><span class="p">)</span><span class="nv">cell</span>
|
|
<span class="nf">atIndex</span><span class="p">:(</span><span class="n">NSInteger</span><span class="p">)</span><span class="nv">index</span><span class="p">;</span></code></pre>
|
|
|
|
</div>
|
|
<div class="language">
|
|
<p class="aside-title">Swift</p>
|
|
<pre class="highlight swift"><code><span class="kd">func</span> <span class="nf">listAdapter</span><span class="p">(</span><span class="n">_</span> <span class="nv">listAdapter</span><span class="p">:</span> <span class="kt"><a href="../Classes/IGListAdapter.html">IGListAdapter</a></span><span class="p">,</span> <span class="n">didEndDisplaying</span> <span class="nv">sectionController</span><span class="p">:</span> <span class="kt"><a href="../Classes/IGListSectionController.html">IGListSectionController</a></span><span class="p">,</span> <span class="nv">cell</span><span class="p">:</span> <span class="kt">UICollectionViewCell</span><span class="p">,</span> <span class="n">at</span> <span class="nv">index</span><span class="p">:</span> <span class="kt">Int</span><span class="p">)</span></code></pre>
|
|
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<h4>Parameters</h4>
|
|
<table class="graybox">
|
|
<tbody>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>listAdapter</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The list adapter in which the cell was displayed.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>sectionController</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The section controller that is no longer displaying the cell.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>cell</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The cell that is no longer displayed.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>index</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The index of the cell in the section.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</section>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</section>
|
|
</section>
|
|
<section id="footer">
|
|
<p>© 2026 <a class="link" href="https://twitter.com/MetaOpenSource" target="_blank" rel="external noopener">Instagram</a>. All rights reserved. (Last updated: 2026-02-15)</p>
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<p>Generated by <a class="link" href="https://github.com/realm/jazzy" target="_blank" rel="external noopener">jazzy ♪♫ v0.15.4</a>, a <a class="link" href="https://realm.io" target="_blank" rel="external noopener">Realm</a> project.</p>
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</html>
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