id="section-length">
      length
  </h3>
  
  <p>Optional length in bytes for resuming partial data chunks. If offset is set to 0, then length is the total length of the file to be downloaded.</p>

<p>Integer, Optional, minvalue=&ldquo;0&rdquo; maxvalue=&ldquo;2000000000&rdquo;</p>

  
  
  <h4>Objective-C</h4>
  <pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class=