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<section class="section">
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<div class="section-content top-matter">
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<h2 id='how-do-i-connect-to-my-websocket-server' class='heading'>How do I connect to my WebSocket server?</h2>
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<p>This library is <strong>NOT</strong> a WebSockets library. This library is only for servers that implement the socket.io protocol,
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such as <a href="https://socket.io/">socket.io</a>. If you need a plain WebSockets client check out
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<a href="https://github.com/daltoniam/Starscream">Starscream</a> for Swift and <a href="https://github.com/acmacalister/jetfire">JetFire</a>
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for Objective-C.</p>
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<h2 id='why-isn-39-t-my-event-handler-being-called' class='heading'>Why isn’t my event handler being called?</h2>
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<p>One of the most common reasons your event might not be called is if the client is released by
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<a href="https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/AutomaticReferenceCounting.html">ARC</a>.</p>
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<p>Take this code for example:</p>
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<pre class="highlight swift"><code><span class="kd">class</span> <span class="kt">Manager</span> <span class="p">{</span>
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<span class="kd">func</span> <span class="nf">addHandlers</span><span class="p">()</span> <span class="p">{</span>
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<span class="k">let</span> <span class="nv">manager</span> <span class="o">=</span> <span class="kt">SocketManager</span><span class="p">(</span><span class="nv">socketURL</span><span class="p">:</span> <span class="kt">URL</span><span class="p">(</span><span class="nv">string</span><span class="p">:</span> <span class="s">"http://somesocketioserver.com"</span><span class="p">)</span><span class="o">!</span><span class="p">)</span>
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<span class="n">manager</span><span class="o">.</span><span class="n">defaultSocket</span><span class="o">.</span><span class="nf">on</span><span class="p">(</span><span class="s">"myEvent"</span><span class="p">)</span> <span class="p">{</span><span class="n">data</span><span class="p">,</span> <span class="n">ack</span> <span class="k">in</span>
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<span class="nf">print</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
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<span class="p">}</span>
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<span class="p">}</span>
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<span class="p">}</span>
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</code></pre>
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<p>This code is <strong>incorrect</strong>, and the event handler will never be called. Because as soon as this method is called <code>manager</code>
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will be released, along with the socket, and its memory reclaimed.</p>
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<p>A correct way would be:</p>
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<pre class="highlight swift"><code><span class="kd">class</span> <span class="kt">Manager</span> <span class="p">{</span>
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<span class="k">let</span> <span class="nv">manager</span> <span class="o">=</span> <span class="kt">SocketManager</span><span class="p">(</span><span class="nv">socketURL</span><span class="p">:</span> <span class="kt">URL</span><span class="p">(</span><span class="nv">string</span><span class="p">:</span> <span class="s">"http://somesocketioserver.com"</span><span class="p">)</span><span class="o">!</span><span class="p">)</span>
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<span class="kd">func</span> <span class="nf">addHandlers</span><span class="p">()</span> <span class="p">{</span>
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<span class="n">manager</span><span class="o">.</span><span class="n">defaultSocket</span><span class="o">.</span><span class="nf">on</span><span class="p">(</span><span class="s">"myEvent"</span><span class="p">)</span> <span class="p">{</span><span class="n">data</span><span class="p">,</span> <span class="n">ack</span> <span class="k">in</span>
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<span class="nf">print</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
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<span class="p">}</span>
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<span class="p">}</span>
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<span class="p">}</span>
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</code></pre>
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<p>© 2020 <a class="link" href="https://github.com/socketio/socket.io-client-swift" target="_blank" rel="external">Erik</a>. All rights reserved. (Last updated: 2020-11-07)</p>
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