title: Why NSURL query doesn´t work
body: <p>I hope someone can help me because I'm frustrating.</p>
  
  <p>I can´t figure out why if I execute :</p>
  
  <p>fileURL = [NSURL URLWithString:@"http://myweb.com/my.pdf"];</p>
  
  <p>then I can display the file correctly in a QLpreviewController</p>
  
  <p>but If I execute</p>
  
  <p>fileURL = [NSURL URLWithString:@"http://myweb.com/download.php?Id=1"]; // is a pdf file</p>
  
  <p>then the file is displayed with encoded characters</p>
  
  <p>Please, anyone can help me ?</p>
  
  <p>Thanks a lot</p>