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            <h1 id='upgrading-from-v15-to-v16' class='heading'>Upgrading from v15 to v16</h1>
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<p>This guide will help you navigate the changes that were introduced in v16.</p>
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<h2 id='objective-c-is-no-longer-supported-you-must-now-use-swift' class='heading'>Objective-c is no longer supported. You must now use Swift.</h2>
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<h2 id='client-supports-multiple-socket-io-versions' class='heading'>Client supports multiple socket.io versions</h2>
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<p>The client now supports socket.io 3 servers. This is mostly a transparent change, however if your sever
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is socket.io 2, you must send <code>.version(.two)</code> as an option to the manager.</p>
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<pre class="highlight swift"><code><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://localhost:8087/"</span><span class="p">)</span><span class="o">!</span><span class="p">,</span> <span class="nv">config</span><span class="p">:</span> <span class="p">[</span><span class="o">.</span><span class="nf">version</span><span class="p">(</span><span class="o">.</span><span class="n">two</span><span class="p">)])</span>
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</code></pre>
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      <p>© 2021 <a class="link" href="https://github.com/socketio/socket.io-client-swift" target="_blank" rel="external">Erik</a>. All rights reserved. (Last updated: 2021-02-01)</p>
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