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315 lines
7.5 KiB
HTML
Executable File
315 lines
7.5 KiB
HTML
Executable File
<!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>ASLayoutSpec(Subclassing) Category Reference</title>
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<body class="appledoc">
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<a href="../index.html"> </a>
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<a href="../index.html">AsyncDisplayKit</a>
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On This Page
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<optgroup label="Instance Methods">
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<option value="//api/name/childAtIndex:">- childAtIndex:</option>
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<option value="//api/name/layoutElementToAddFromLayoutElement:">- layoutElementToAddFromLayoutElement:</option>
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<option value="//api/name/setChild:atIndex:">- setChild:atIndex:</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">ASLayoutSpec(Subclassing) Category 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>Declared in</th>
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<td>ASLayoutSpec+Subclasses.h</td>
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</tr>
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</tbody></table></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/layoutElementToAddFromLayoutElement:" title="layoutElementToAddFromLayoutElement:"></a>
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<h3 class="method-title"><code><a href="#//api/name/layoutElementToAddFromLayoutElement:">– layoutElementToAddFromLayoutElement:</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>Helper method for finalLayoutElement support</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (id<ASLayoutElement>)layoutElementToAddFromLayoutElement:(id<ASLayoutElement>)<em>child</em></code></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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<div class="warning"><p><strong>Warning:</strong> If you are getting recursion crashes here after implementing finalLayoutElement, make sure
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that you are setting isFinalLayoutElement flag to YES. This must be one BEFORE adding a child
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to the new ASLayoutElement.</p>
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<p>For example:
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- (id<a href="../Protocols/ASLayoutElement.html">ASLayoutElement</a>)finalLayoutElement
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{
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ASInsetLayoutSpec *insetSpec = [[ASInsetLayoutSpec alloc] init];
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insetSpec.insets = UIEdgeInsetsMake(10,10,10,10);
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insetSpec.isFinalLayoutElement = YES;
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[insetSpec setChild:self];
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return insetSpec;
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}</p></div>
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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">ASLayoutSpec+Subclasses.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/setChild:atIndex:" title="setChild:atIndex:"></a>
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<h3 class="method-title"><code><a href="#//api/name/setChild:atIndex:">– setChild:atIndex:</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>Adds a child with the given identifier to this layout spec.</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (void)setChild:(id<ASLayoutElement>)<em>child</em> atIndex:(NSUInteger)<em>index</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>child</code></th>
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<td><p>A child to be added.</p></td>
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</tr>
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<tr>
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<th scope="row" class="argument-name"><code>index</code></th>
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<td><p>An index associated with the child.</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>Every ASLayoutSpec must act on at least one child. The ASLayoutSpec base class takes the
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responsibility of holding on to the spec children. Some layout specs, like ASInsetLayoutSpec,
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only require a single child.</p>
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<p>For layout specs that require a known number of children (ASBackgroundLayoutSpec, for example)
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a subclass can use the setChild method to set the “primary” child. It should then use this method
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to set any other required children. Ideally a subclass would hide this from the user, and use the
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setChild:forIndex: internally. For example, ASBackgroundLayoutSpec exposes a backgroundChild
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property that behind the scenes is calling setChild:forIndex:.</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">ASLayoutSpec+Subclasses.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/childAtIndex:" title="childAtIndex:"></a>
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<h3 class="method-title"><code><a href="#//api/name/childAtIndex:">– childAtIndex:</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>Returns the child added to this layout spec using the given index.</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (nullable id<ASLayoutElement>)childAtIndex:(NSUInteger)<em>index</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>index</code></th>
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<td><p>An identifier associated with the the child.</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 declared-in-section">
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<h4 class="method-subtitle">Declared In</h4>
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<p><code class="declared-in-ref">ASLayoutSpec+Subclasses.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 © 2016 AsyncDisplayKit. All rights reserved. Updated: 2016-11-05</p>
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<p class="generator">Generated by <a href="http://appledoc.gentlebytes.com">appledoc 2.2.1 (build 1334)</a>.</p>
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</html> |