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git-subtree-dir: submodules/AsyncDisplayKit git-subtree-mainline: d06f423e0ed3df1fed9bd10d79ee312a9179b632 git-subtree-split: 02bedc12816e251ad71777f9d2578329b6d2bef6
269 lines
6.7 KiB
HTML
Executable File
269 lines
6.7 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>ASVisibilityDepth Protocol Reference</title>
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<a href="../index.html"> </a>
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</h1>
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<a href="../index.html">Texture</a>
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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/visibilityDepth">- visibilityDepth</option>
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<option value="//api/name/visibilityDepthDidChange">- visibilityDepthDidChange</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">ASVisibilityDepth 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>NSObject</td>
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</tr><tr>
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<th>Declared in</th>
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<td>ASVisibilityProtocols.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>ASVisibilityDepth</p><p>“Visibility Depth” represents the number of user actions required to make an ASDisplayNode or
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ASViewController visibile. Texture uses this information to intelligently manage memory and focus
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resources where they are most visible to the user.</p>
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<p>The ASVisibilityDepth protocol describes how custom view controllers can integrate with this system.</p>
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<p>Parent view controllers should also implement @c ASManagesChildVisibilityDepth</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/visibilityDepth" title="visibilityDepth"></a>
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<h3 class="method-title"><code><a href="#//api/name/visibilityDepth">– visibilityDepth</a></code>
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<span class="task-item-suffix">required method</span></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>Visibility depth</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (NSInteger)visibilityDepth</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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<p>Represents the number of user actions necessary to reach the view controller. An increased visibility
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depth indicates a higher number of user interactions for the view controller to be visible again. For example,
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an onscreen navigation controller’s top view controller should have a visibility depth of 0. The view controller
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one from the top should have a visibility deptch of 1 as should the root view controller in the stack (because
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the user can hold the back button to pop to the root view controller).</p>
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<p>Visibility depth is used to automatically adjust ranges on range controllers (and thus free up memory) and can
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be used to reduce memory usage of other items as well.</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">ASVisibilityProtocols.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/visibilityDepthDidChange" title="visibilityDepthDidChange"></a>
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<h3 class="method-title"><code><a href="#//api/name/visibilityDepthDidChange">– visibilityDepthDidChange</a></code>
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<span class="task-item-suffix">required method</span></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>Called when visibility depth changes</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (void)visibilityDepthDidChange</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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<p>@c visibilityDepthDidChange is called whenever the visibility depth of the represented view controller
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has changed.</p>
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<p>If implemented by a view controller container, use this method to notify child view controllers that their view
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depth has changed @see ASNavigationController.m</p>
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<p>If implemented on an ASViewController, use this method to reduce or increase the resources that your
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view controller uses. A higher visibility depth view controller should decrease it’s resource usage, a lower
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visibility depth controller should pre-warm resources in preperation for a display at 0 depth.</p>
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<p>ASViewController implements this method and reduces / increases range mode of supporting nodes (such as ASCollectionNode
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and ASTableNode).</p>
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</div>
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<div class="method-subsection see-also-section">
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<h4 class="method-subtitle">See Also</h4>
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<ul>
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<li><code><p><a href="#//api/name/visibilityDepth">- visibilityDepth</a></p></code></li>
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</ul>
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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">ASVisibilityProtocols.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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