title: multiple files with appendPartWithFileData
body: <p>I'm trying to send multiple files in json structure like this :</p>
  
  <pre><code>files = {
      file1 = {
          nfo1 = "text 1 1",
          nfo2 = "text 1 2",
          data = &lt;DATA&gt;,
      },
      file2 = {
          nfo1 = "text 2 1",
          nfo2 = "text 2 2",
          data = &lt;DATA&gt;,
      },
  }
  </code></pre>
  
  <p>I think i have to do something like this with AFHTTPSessionManager : </p>
  
  <pre><code>NSDictionary *parameters = @{@"files":@{
         @"nfo1" = @"text 1 1",
         @"nfo2" = @"text 1 2",
     },
     @{
         @"nfo1" = @"text 2 1",
         @"nfo2" = @"text 2 2",
     }
  };
  
  [self POST:path parameters:parameters constructingBodyWithBlock:^(id&lt;AFMultipartFormData&gt; formData) {
  
      [formData appendPartWithFileData:fileData1 name:@"data" fileName:fileName1 mimeType:mimeType1];
      [formData appendPartWithFileData:fileData2 name:@"data" fileName:fileName2 mimeType:mimeType2];
  
  } success:nil failure:nil];
  </code></pre>
  
  <p>But i don't understand the way to identify data for file1 and for file2 using appendPartWithFileData !...</p>