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RxSwift.html
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<!DOCTYPE html>
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<title>RxSwift Reference</title>
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<article class="main-content">
<section class="section">
<div class="section-content top-matter">
<h1>RxSwift</h1>
</div>
</section>
<section class="section">
<div class="section-content">
<div class="task-group">
<ul class="item-container">
<li class="item">
<div>
<code>
<a name="/s:7RxSwift11AnyObserverV"></a>
<a name="//apple_ref/swift/Struct/AnyObserver" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift11AnyObserverV">AnyObserver</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>A type-erased <code><a href="Protocols/ObserverType.html">ObserverType</a></code>.</p>
<p>Forwards operations to an arbitrary underlying observer with the same <code>Element</code> type, hiding the specifics of the underlying observer type.</p>
<a href="Structs/AnyObserver.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">AnyObserver</span><span class="o"><</span><span class="kt">Element</span><span class="o">></span> <span class="p">:</span> <span class="kt"><a href="Protocols/ObserverType.html">ObserverType</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift6BinderV"></a>
<a name="//apple_ref/swift/Struct/Binder" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift6BinderV">Binder</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Observer that enforces interface binding rules:</p>
<ul>
<li>can’t bind errors (in debug builds binding of errors causes <code>fatalError</code> in release builds errors are being logged)</li>
<li>ensures binding is performed on a specific scheduler</li>
</ul>
<p><code>Binder</code> doesn’t retain target and in case target is released, element isn’t bound.</p>
<p>By default it binds elements on main scheduler.</p>
<a href="Structs/Binder.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">Binder</span><span class="o"><</span><span class="kt">Value</span><span class="o">></span> <span class="p">:</span> <span class="kt"><a href="Protocols/ObserverType.html">ObserverType</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift10CancelableP"></a>
<a name="//apple_ref/swift/Protocol/Cancelable" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift10CancelableP">Cancelable</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Represents disposable resource with state tracking.</p>
<a href="Protocols/Cancelable.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">protocol</span> <span class="kt">Cancelable</span> <span class="p">:</span> <span class="kt"><a href="Protocols/Disposable.html">Disposable</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift25ConnectableObservableTypeP"></a>
<a name="//apple_ref/swift/Protocol/ConnectableObservableType" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift25ConnectableObservableTypeP">ConnectableObservableType</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Represents an observable sequence wrapper that can be connected and disconnected from its underlying observable sequence.</p>
<a href="Protocols/ConnectableObservableType.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">protocol</span> <span class="kt">ConnectableObservableType</span> <span class="p">:</span> <span class="kt"><a href="Protocols/ObservableType.html">ObservableType</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift10DisposableP"></a>
<a name="//apple_ref/swift/Protocol/Disposable" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift10DisposableP">Disposable</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Represents a disposable resource.</p>
<a href="Protocols/Disposable.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">protocol</span> <span class="kt">Disposable</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift5EventO"></a>
<a name="//apple_ref/swift/Enum/Event" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift5EventO">Event</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Represents a sequence event.</p>
<p>Sequence grammar:
<strong>next* (error | completed)</strong></p>
<a href="Enums/Event.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">@frozen</span>
<span class="kd">public</span> <span class="kd">enum</span> <span class="kt">Event</span><span class="o"><</span><span class="kt">Element</span><span class="o">></span></code></pre>
<pre class="highlight swift"><code><span class="kd">extension</span> <span class="kt">Event</span><span class="p">:</span> <span class="kt">CustomDebugStringConvertible</span></code></pre>
<pre class="highlight swift"><code><span class="kd">extension</span> <span class="kt">Event</span><span class="p">:</span> <span class="kt"><a href="Protocols/EventConvertible.html">EventConvertible</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift17GroupedObservableV"></a>
<a name="//apple_ref/swift/Struct/GroupedObservable" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift17GroupedObservableV">GroupedObservable</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Represents an observable sequence of elements that share a common key.
<code>GroupedObservable</code> is typically created by the <code>groupBy</code> operator.
Each <code>GroupedObservable</code> instance represents a collection of elements
that are grouped by a specific key.</p>
<p>Example usage:</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">observable</span> <span class="o">=</span> <span class="kt">Observable</span><span class="o">.</span><span class="nf">of</span><span class="p">(</span><span class="s">"Apple"</span><span class="p">,</span> <span class="s">"Banana"</span><span class="p">,</span> <span class="s">"Apricot"</span><span class="p">,</span> <span class="s">"Blueberry"</span><span class="p">,</span> <span class="s">"Avocado"</span><span class="p">)</span>
<span class="k">let</span> <span class="nv">grouped</span> <span class="o">=</span> <span class="n">observable</span><span class="o">.</span><span class="n">groupBy</span> <span class="p">{</span> <span class="n">fruit</span> <span class="k">in</span>
<span class="n">fruit</span><span class="o">.</span><span class="n">first</span><span class="o">!</span> <span class="c1">// Grouping by the first letter of each fruit</span>
<span class="p">}</span>
<span class="n">_</span> <span class="o">=</span> <span class="n">grouped</span><span class="o">.</span><span class="n">subscribe</span> <span class="p">{</span> <span class="n">group</span> <span class="k">in</span>
<span class="nf">print</span><span class="p">(</span><span class="s">"Group: </span><span class="se">\(</span><span class="n">group</span><span class="o">.</span><span class="n">key</span><span class="se">)</span><span class="s">"</span><span class="p">)</span>
<span class="n">_</span> <span class="o">=</span> <span class="n">group</span><span class="o">.</span><span class="n">subscribe</span> <span class="p">{</span> <span class="n">event</span> <span class="k">in</span>
<span class="nf">print</span><span class="p">(</span><span class="n">event</span><span class="p">)</span>
<span class="p">}</span>
<span class="p">}</span>
</code></pre>
<p>This will print:</p>
<pre class="highlight swift"><code><span class="kt">Group</span><span class="p">:</span> <span class="kt">A</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Apple</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Apricot</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Avocado</span><span class="p">)</span>
<span class="kt">Group</span><span class="p">:</span> <span class="kt">B</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Banana</span><span class="p">)</span>
<span class="nf">next</span><span class="p">(</span><span class="kt">Blueberry</span><span class="p">)</span>
</code></pre>
<a href="Structs/GroupedObservable.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">GroupedObservable</span><span class="o"><</span><span class="kt">Key</span><span class="p">,</span> <span class="kt">Element</span><span class="o">></span> <span class="p">:</span> <span class="kt"><a href="Protocols/ObservableType.html">ObservableType</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift22ImmediateSchedulerTypeP"></a>
<a name="//apple_ref/swift/Protocol/ImmediateSchedulerType" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift22ImmediateSchedulerTypeP">ImmediateSchedulerType</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Represents an object that immediately schedules units of work.</p>
<a href="Protocols/ImmediateSchedulerType.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">protocol</span> <span class="kt">ImmediateSchedulerType</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift10ObservableC"></a>
<a name="//apple_ref/swift/Class/Observable" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift10ObservableC">Observable</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Undocumented</p>
<a href="Classes/Observable.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">class</span> <span class="kt">Observable</span><span class="o"><</span><span class="kt">Element</span><span class="o">></span> <span class="p">:</span> <span class="kt"><a href="Protocols/ObservableType.html">ObservableType</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift25ObservableConvertibleTypeP"></a>
<a name="//apple_ref/swift/Protocol/ObservableConvertibleType" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift25ObservableConvertibleTypeP">ObservableConvertibleType</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Type that can be converted to observable sequence (<code><a href="Classes/Observable.html">Observable<Element></a></code>).</p>
<a href="Protocols/ObservableConvertibleType.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">protocol</span> <span class="kt">ObservableConvertibleType</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift14ObservableTypeP"></a>
<a name="//apple_ref/swift/Protocol/ObservableType" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift14ObservableTypeP">ObservableType</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Represents a push style sequence.</p>
<a href="Protocols/ObservableType.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">protocol</span> <span class="kt">ObservableType</span> <span class="p">:</span> <span class="kt"><a href="Protocols/ObservableConvertibleType.html">ObservableConvertibleType</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift12ObserverTypeP"></a>
<a name="//apple_ref/swift/Protocol/ObserverType" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift12ObserverTypeP">ObserverType</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Supports push-style iteration over an observable sequence.</p>
<a href="Protocols/ObserverType.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">protocol</span> <span class="kt">ObserverType</span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift8ReactiveV"></a>
<a name="//apple_ref/swift/Struct/Reactive" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift8ReactiveV">Reactive</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Use <code>Reactive</code> proxy as customization point for constrained protocol extensions.</p>
<p>General pattern would be:</p>
<p>// 1. Extend Reactive protocol with constrain on Base
// Read as: Reactive Extension where Base is a SomeType
extension Reactive where Base: SomeType {
// 2. Put any specific reactive extension for SomeType here
}</p>
<p>With this approach we can have more specialized methods and properties using
<code>Base</code> and not just specialized on common base type.</p>
<p><code><a href="Structs/Binder.html">Binder</a></code>s are also automatically synthesized using <code>@dynamicMemberLookup</code> for writable reference properties of the reactive base.</p>
<a href="Structs/Reactive.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">@dynamicMemberLookup</span>
<span class="kd">public</span> <span class="kd">struct</span> <span class="kt">Reactive</span><span class="o"><</span><span class="kt">Base</span><span class="o">></span></code></pre>
</div>
</div>
</section>
</div>
</li>
<li class="item">
<div>
<code>
<a name="/s:7RxSwift13SchedulerTypeP"></a>
<a name="//apple_ref/swift/Protocol/SchedulerType" class="dashAnchor"></a>
<a class="token" href="#/s:7RxSwift13SchedulerTypeP">SchedulerType</a>
</code>
</div>
<div class="height-container">
<div class="pointer-container"></div>
<section class="section">
<div class="pointer"></div>
<div class="abstract">
<p>Represents an object that schedules units of work.</p>
<a href="Protocols/SchedulerType.html" class="slightly-smaller">See more</a>
</div>
<div class="declaration">
<h4>Declaration</h4>
<div class="language">
<p class="aside-title">Swift</p>
<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">protocol</span> <span class="kt">SchedulerType</span> <span class="p">:</span> <span class="kt"><a href="Protocols/ImmediateSchedulerType.html">ImmediateSchedulerType</a></span></code></pre>
</div>
</div>
</section>
</div>
</li>
</ul>
</div>
</div>
</section>
</article>
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<section class="footer">
<p>© 2024 <a class="link" href="https://github.com/ReactiveX/RxSwift" target="_blank" rel="external noopener">Shai Mishali and Krunoslav Zaher</a>. All rights reserved. (Last updated: 2024-10-06)</p>
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