Attributed string not working on Label

Question

I am setting attribute on label my code is written below, the only problem is my font and color is not getting rendered on label .

func setDataWithContent(content: EmbeddedContent) {

        if let htmlString = content.text {
            do {
                let encodedData = htmlString.dataUsingEncoding(NSUTF8StringEncoding)!
                let attributedOptions : [String: AnyObject] = [
                    NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
                    NSCharacterEncodingDocumentAttribute: NSUTF8StringEncoding,
                    NSFontAttributeName: UIFont(name: "SourceSansPro-Regular", size:16)!,
                    NSForegroundColorAttributeName: UIColor.redColor()
                ]
                let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
                htmlTextLabel.attributedText = attributedString

            } catch {
                fatalError("Error: \(error)")
            }
        }

    }

can anyone help?

Answer 1

NSAttributedString(data:options:documentsAttributes) doesn't support NSFontAttributeName and NSForegroundColorAttributeName in its options. They will be ignored.

So, you have to use a NSMutableAttributedString, and add your own effects afterwards:

let encodedData = htmlString.dataUsingEncoding(NSUTF8StringEncoding)!

let attributedOptions : [String: AnyObject] = [
    NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
    NSCharacterEncodingDocumentAttribute: NSUTF8StringEncoding
]
let attributedString = try NSMutableAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
let addedEffects:[String:AnyObject] = [                                    
    NSFontAttributeName: UIFont(name: "SourceSansPro-Regular", size:16)!,
    NSForegroundColorAttributeName: UIColor.redColor()
]
attributedString.addAttributes(addedEffects, range:NSRange(location:0,length:attributedString.length)
htmlTextLabel.attributedText = attributedString

Note: I don't know if it compiles, but you should get the idea.

I posted the answer to have a "Swift way" of understanding the issue, but it's clearly a duplicate and will happily delete the answer if the question if flagged as such.