Swift: fill AutoreleasingUnsafeMutablePointer<NSDictionary?>

I am DTCoreText to transform HTML to attributed text. Because I want to set the font up front, not afterwards as that would override all bold, italic etcetera tags I want to set the document attributes in the constructor. This constructors wants me to give a AutoreleasingUnsafeMutablePointer that more or less seems to be a NSDictionary? with & up front. Sort of. Only it doesn't let me set it in any way. I've tried .memory, tried to cast the dictionary in any possible way and it just doesn't accept any data.

    let font = UIFont.systemFontOfSize(12)
    let data = info.desc?.dataUsingEncoding(NSUTF8StringEncoding)
    let attributes: NSMutableDictionary? = NSMutableDictionary()
    attributes!.setObject(font, forKey: NSFontAttributeName)
    var attributeRef: AutoreleasingUnsafeMutablePointer<NSDictionary?> = AutoreleasingUnsafeMutablePointer.null()
    NSMutableAttributedString(HTMLData: data, documentAttributes: nil)
    //attributeRef = *attributeDict
    let attributedString = NSMutableAttributedString(HTMLData: data, documentAttributes:attributeRef)
    let paragraphStyle: NSMutableParagraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineBreakMode = NSLineBreakMode.ByWordWrapping;
    let range = NSMakeRange(0, attributedString.length)
    attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: range)
    lblMessage.attributedText = attributedString

Solution

You should not be using DTCoreText at this point; iOS now has native calls for this. Just say var dict = NSDictionary?() and pass &dict. Here's example code:

let s = "<html><body><h1>Howdy</h1><p>Hello</p></body></html>"
let d = s.dataUsingEncoding(NSUTF16StringEncoding, allowLossyConversion: false)
var dict = NSDictionary?()
let att = NSAttributedString(data: d!, options: [
    NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType
    ], documentAttributes: &dict, error: nil)
println(att!)
println(dict!)

You'll see that this works perfectly well. Here is dict:

BottomMargin = 72;
Converted = "-1";
DocumentType = NSHTML;
LeftMargin = 90;
PaperMargin = "UIEdgeInsets: {72, 90, 72, 90}";
PaperSize = "NSSize: {612, 792}";
RightMargin = 90;
TopMargin = 72;
UTI = "public.html";

However, I usually pass nil because nothing is coming back in the second dictionary that I really care about.