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        <article class="main-content">
  
          <section class="section">
            <div class="section-content top-matter">
              <h1>Classes</h1>
              <p>The following classes are available globally.</p>
  
            </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:14AlamofireImage011AutoPurgingB5CacheC"></a>
                      <a name="//apple_ref/swift/Class/AutoPurgingImageCache" class="dashAnchor"></a>
                      <a class="token" href="#/s:14AlamofireImage011AutoPurgingB5CacheC">AutoPurgingImageCache</a>
                      </code>
                    </div>
                    <div class="height-container">
                      <div class="pointer-container"></div>
                      <section class="section">
                        <div class="pointer"></div>
                        <div class="abstract">
                          <p>The <code>AutoPurgingImageCache</code> in an in-memory image cache used to store images up to a given memory capacity. When
  the memory capacity is reached, the image cache is sorted by last access date, then the oldest image is continuously
  purged until the preferred memory usage after purge is met. Each time an image is accessed through the cache, the
  internal access date of the image is updated.</p>
  
                          <a href="Classes/AutoPurgingImageCache.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">open</span> <span class="kd">class</span> <span class="kt">AutoPurgingImageCache</span> <span class="p">:</span> <span class="kt"><a href="Protocols/ImageRequestCache.html">ImageRequestCache</a></span></code></pre>
  
                          </div>
                        </div>
                      </section>
                    </div>
                  </li>
                  <li class="item">
                    <div>
                      <code>
                      <a name="/s:14AlamofireImage14RequestReceiptC"></a>
                      <a name="//apple_ref/swift/Class/RequestReceipt" class="dashAnchor"></a>
                      <a class="token" href="#/s:14AlamofireImage14RequestReceiptC">RequestReceipt</a>
                      </code>
                    </div>
                    <div class="height-container">
                      <div class="pointer-container"></div>
                      <section class="section">
                        <div class="pointer"></div>
                        <div class="abstract">
                          <p>The <code>RequestReceipt</code> is an object vended by the <code><a href="Classes/ImageDownloader.html">ImageDownloader</a></code> when starting a download request. It can be used
  to cancel active requests running on the <code><a href="Classes/ImageDownloader.html">ImageDownloader</a></code> session. As a general rule, image download requests
  should be cancelled using the <code>RequestReceipt</code> instead of calling <code>cancel</code> directly on the <code>request</code> itself. The
  <code><a href="Classes/ImageDownloader.html">ImageDownloader</a></code> is optimized to handle duplicate request scenarios as well as pending versus active downloads.</p>
  
                          <a href="Classes/RequestReceipt.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">open</span> <span class="kd">class</span> <span class="kt">RequestReceipt</span></code></pre>
  
                          </div>
                        </div>
                      </section>
                    </div>
                  </li>
                  <li class="item">
                    <div>
                      <code>
                      <a name="/s:14AlamofireImage0B10DownloaderC"></a>
                      <a name="//apple_ref/swift/Class/ImageDownloader" class="dashAnchor"></a>
                      <a class="token" href="#/s:14AlamofireImage0B10DownloaderC">ImageDownloader</a>
                      </code>
                    </div>
                    <div class="height-container">
                      <div class="pointer-container"></div>
                      <section class="section">
                        <div class="pointer"></div>
                        <div class="abstract">
                          <p>The <code>ImageDownloader</code> class is responsible for downloading images in parallel on a prioritized queue. Incoming
  downloads are added to the front or back of the queue depending on the download prioritization. Each downloaded
  image is cached in the underlying <code>NSURLCache</code> as well as the in-memory image cache that supports image filters.
  By default, any download request with a cached image equivalent in the image cache will automatically be served the
  cached image representation. Additional advanced features include supporting multiple image filters and completion
  handlers for a single request.</p>
  
                          <a href="Classes/ImageDownloader.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">open</span> <span class="kd">class</span> <span class="kt">ImageDownloader</span></code></pre>
  
                          </div>
                        </div>
                      </section>
                    </div>
                  </li>
                  <li class="item">
                    <div>
                      <code>
                      <a name="/s:14AlamofireImage0B18ResponseSerializerC"></a>
                      <a name="//apple_ref/swift/Class/ImageResponseSerializer" class="dashAnchor"></a>
                      <a class="token" href="#/s:14AlamofireImage0B18ResponseSerializerC">ImageResponseSerializer</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/ImageResponseSerializer.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">final</span> <span class="kd">class</span> <span class="kt">ImageResponseSerializer</span> <span class="p">:</span> <span class="kt">ResponseSerializer</span></code></pre>
  
                          </div>
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                </ul>
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