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<!DOCTYPE html>
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<title>IGListCollectionView Class Reference</title>
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<article class="main-content">
<section>
<section class="section">
<h1>IGListCollectionView</h1>
<div class="declaration">
<div class="language">
<pre class="highlight objective_c"><code>
<span class="k">@interface</span> <span class="nc">IGListCollectionView</span> <span class="p">:</span> <span class="nc">UICollectionView</span></code></pre>
</div>
</div>
<p>This <code>UICollectionView</code> subclass allows for partial layout invalidation using <code><a href="../Classes/IGListCollectionViewLayout.html">IGListCollectionViewLayout</a></code>.</p>
<div class="aside aside-note">
<p class="aside-title">Note</p>
When updating a collection view (ex: calling <code>-insertSections</code>), <code>-invalidateLayoutWithContext</code> gets called on
the layout object. However, the invalidation context doesn’t provide details on which index paths are being modified,
which typically forces a full layout re-calculation. <code>IGListCollectionView</code> gives <code><a href="../Classes/IGListCollectionViewLayout.html">IGListCollectionViewLayout</a></code> the
missing information to re-calculate only the modified layout attributes.
</div>
</section>
<section class="section task-group-section">
<div class="task-group">
<ul>
<li class="item">
<div>
<code>
<a name="/c:objc(cs)IGListCollectionView(im)initWithFrame:listCollectionViewLayout:"></a>
<a name="//apple_ref/objc/Method/-initWithFrame:listCollectionViewLayout:" class="dashAnchor"></a>
<a class="token" href="#/c:objc(cs)IGListCollectionView(im)initWithFrame:listCollectionViewLayout:">-initWithFrame:listCollectionViewLayout:</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Create a new view with an <code>IGListcollectionViewLayout</code> class or subclass.</p>
<div class="aside aside-note">
<p class="aside-title">Note</p>
<p>You can initialize a new view with a base layout by simply calling <code>-[IGListCollectionView initWithFrame:]</code>.</p>
</div>
</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="n">nonnull</span> <span class="n">instancetype</span><span class="p">)</span><span class="nf">initWithFrame</span><span class="p">:(</span><span class="n">CGRect</span><span class="p">)</span><span class="nv">frame</span>
<span class="nf">listCollectionViewLayout</span><span class="p">:</span>
<span class="p">(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/IGListCollectionViewLayout.html">IGListCollectionViewLayout</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">collectionViewLayout</span><span class="p">;</span></code></pre>
</div>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="nf">init</span><span class="p">(</span><span class="nv">frame</span><span class="p">:</span> <span class="kt">CGRect</span><span class="p">,</span> <span class="n">listCollectionViewLayout</span> <span class="nv">collectionViewLayout</span><span class="p">:</span> <span class="kt"><a href="../Classes/IGListCollectionViewLayout.html">IGListCollectionViewLayout</a></span><span class="p">)</span></code></pre>
</div>
</div>
<div>
<h4>Parameters</h4>
<table class="graybox">
<tbody>
<tr>
<td>
<code>
<em>frame</em>
</code>
</td>
<td>
<div>
<p>The frame to initialize with.</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>
</tbody>
</table>
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