title: Download file using AFNetworking on iOS 6
body: <p>I've recently updated to AFNetworking 2.0. The documentation said it is compatible with iOS6.0+. I am building a iOS 6.0 app, when I am trying to implement a download method (both images and videos). The example use </p>
  
  <pre><code>AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
  </code></pre>
  
  <p>However, I got an "Use of undeclared identifier 'AFURLSessionManager'" error. And I found out that AFURLSessionManager use a class that is only available from iOS7. I'm just wondering, who could I download in iOS6 using AFNetworking? </p>
  
  <p>Also, is there anyway to see download progress?</p>
  
  <p>Thank you</p>