title: How to add parameters to a http post call?
body: <p>I'm using the following lines of code to make an http post call</p>
  
  <pre><code>NSData *imageData = UIImageJPEGRepresentation(image, 0.9);
  NSString *urlString = @"http://169.254.225.91:8888/upload.php";
  
  // setting up the request object now
  NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
  [request setURL:[NSURL URLWithString:urlString]];
  [request setHTTPMethod:@"POST"];
  
  NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
  NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
  [request addValue:contentType forHTTPHeaderField: @"Content-Type"];
  
  NSMutableData *body = [NSMutableData data];
  [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
  [body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"ipodfile.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
  [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
  </code></pre>
  
  <p>how do I add extra string parameters in the body?</p>