mirror of
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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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536 lines
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<section>
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<section class="section">
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<h1>IGListCollectionViewDelegateLayout</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>
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<span class="nc">IGListCollectionViewDelegateLayout</span> <span class="o"><</span><span class="n">UICollectionViewDelegateFlowLayout</span><span class="o">></span></code></pre>
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<pre class="highlight swift"><code><span class="kd">protocol</span> <span class="kt">IGListCollectionViewDelegateLayout</span> <span class="p">:</span> <span class="kt">UICollectionViewDelegateFlowLayout</span></code></pre>
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</div>
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</div>
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<p>Conform to <code>IGListCollectionViewDelegateLayout</code> to provide customized layout information for a collection view.</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)IGListCollectionViewDelegateLayout(im)collectionView:layout:customizedInitialLayoutAttributes:atIndexPath:"></a>
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<a name="//apple_ref/objc/Method/-collectionView:layout:customizedInitialLayoutAttributes:atIndexPath:" class="dashAnchor"></a>
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<a class="token" href="#/c:objc(pl)IGListCollectionViewDelegateLayout(im)collectionView:layout:customizedInitialLayoutAttributes:atIndexPath:">-collectionView:<wbr>layout:<wbr>customizedInitialLayoutAttributes:<wbr>atIndexPath:<wbr></a>
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</code>
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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>Asks the delegate to customize and return the starting layout information for an item being inserted into the collection view.</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="n">UICollectionViewLayoutAttributes</span> <span class="o">*</span><span class="p">)</span><span class="nf">collectionView</span><span class="p">:</span>
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<span class="p">(</span><span class="n">UICollectionView</span> <span class="o">*</span><span class="p">)</span><span class="nv">collectionView</span>
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<span class="nf">layout</span><span class="p">:(</span><span class="n">UICollectionViewLayout</span> <span class="o">*</span><span class="p">)</span>
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<span class="n">collectionViewLayout</span>
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<span class="n">customizedInitialLayoutAttributes</span><span class="o">:</span>
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<span class="p">(</span><span class="n">UICollectionViewLayoutAttributes</span> <span class="o">*</span><span class="p">)</span><span class="n">attributes</span>
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<span class="n">atIndexPath</span><span class="o">:</span><span class="p">(</span><span class="n">NSIndexPath</span> <span class="o">*</span><span class="p">)</span><span class="n">indexPath</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">collectionView</span><span class="p">(</span><span class="n">_</span> <span class="nv">collectionView</span><span class="p">:</span> <span class="kt">UICollectionView</span><span class="o">!</span><span class="p">,</span> <span class="n">layout</span> <span class="nv">collectionViewLayout</span><span class="p">:</span> <span class="kt">UICollectionViewLayout</span><span class="o">!</span><span class="p">,</span> <span class="n">customizedInitialLayoutAttributes</span> <span class="nv">attributes</span><span class="p">:</span> <span class="kt">UICollectionViewLayoutAttributes</span><span class="o">!</span><span class="p">,</span> <span class="n">at</span> <span class="nv">indexPath</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="o">!</span><span class="p">)</span> <span class="o">-></span> <span class="kt">UICollectionViewLayoutAttributes</span><span class="o">!</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>collectionView</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 collection view to perform the transition on.</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>collectionViewLayout</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 layout to use with the collection view.</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>attributes</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 starting layout information for an item being inserted into the collection view.</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>indexPath</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 index path of the item being inserted.</p>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</section>
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</div>
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</li>
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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)IGListCollectionViewDelegateLayout(im)collectionView:layout:customizedFinalLayoutAttributes:atIndexPath:"></a>
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<a name="//apple_ref/objc/Method/-collectionView:layout:customizedFinalLayoutAttributes:atIndexPath:" class="dashAnchor"></a>
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<a class="token" href="#/c:objc(pl)IGListCollectionViewDelegateLayout(im)collectionView:layout:customizedFinalLayoutAttributes:atIndexPath:">-collectionView:<wbr>layout:<wbr>customizedFinalLayoutAttributes:<wbr>atIndexPath:<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">
|
|
<div class="pointer"></div>
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<div class="abstract">
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<p>Asks the delegate to customize and return the final layout information for an item that is about to be removed from the collection view.</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">
|
|
<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="n">UICollectionViewLayoutAttributes</span> <span class="o">*</span><span class="p">)</span>
|
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<span class="nf">collectionView</span><span class="p">:(</span><span class="n">UICollectionView</span> <span class="o">*</span><span class="p">)</span><span class="nv">collectionView</span>
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|
<span class="nf">layout</span><span class="p">:</span>
|
|
<span class="p">(</span><span class="n">UICollectionViewLayout</span> <span class="o">*</span><span class="p">)</span><span class="nv">collectionViewLayout</span>
|
|
<span class="nf">customizedFinalLayoutAttributes</span><span class="p">:</span>
|
|
<span class="p">(</span><span class="n">UICollectionViewLayoutAttributes</span> <span class="o">*</span><span class="p">)</span><span class="nv">attributes</span>
|
|
<span class="nf">atIndexPath</span><span class="p">:(</span><span class="n">NSIndexPath</span> <span class="o">*</span><span class="p">)</span><span class="nv">indexPath</span><span class="p">;</span></code></pre>
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|
|
|
</div>
|
|
<div class="language">
|
|
<p class="aside-title">Swift</p>
|
|
<pre class="highlight swift"><code><span class="kd">func</span> <span class="nf">collectionView</span><span class="p">(</span><span class="n">_</span> <span class="nv">collectionView</span><span class="p">:</span> <span class="kt">UICollectionView</span><span class="o">!</span><span class="p">,</span> <span class="n">layout</span> <span class="nv">collectionViewLayout</span><span class="p">:</span> <span class="kt">UICollectionViewLayout</span><span class="o">!</span><span class="p">,</span> <span class="n">customizedFinalLayoutAttributes</span> <span class="nv">attributes</span><span class="p">:</span> <span class="kt">UICollectionViewLayoutAttributes</span><span class="o">!</span><span class="p">,</span> <span class="n">at</span> <span class="nv">indexPath</span><span class="p">:</span> <span class="kt">IndexPath</span><span class="o">!</span><span class="p">)</span> <span class="o">-></span> <span class="kt">UICollectionViewLayoutAttributes</span><span class="o">!</span></code></pre>
|
|
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<h4>Parameters</h4>
|
|
<table class="graybox">
|
|
<tbody>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>collectionView</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The collection view to perform the transition on.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>collectionViewLayout</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The layout to use with the collection view.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>attributes</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The final layout information for an item that is about to be removed from the collection view.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<code>
|
|
<em>indexPath</em>
|
|
</code>
|
|
</td>
|
|
<td>
|
|
<div>
|
|
<p>The index path of the item being deleted.</p>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</section>
|
|
</div>
|
|
</li>
|
|
</ul>
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|
</div>
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</section>
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</section>
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|
<section id="footer">
|
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<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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