NSAttributedString changing the font size - ios

Question

I am using this extension of String to get proper attributed text from the HTML tags in a String.
extension String {
var html2AttributedString: NSAttributedString? {
guard
let data = dataUsingEncoding(NSUTF8StringEncoding)
else { return nil }
do {
return try NSAttributedString(data: data, options: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType,NSCharacterEncodingDocumentAttribute:NSUTF8StringEncoding ], documentAttributes: nil)
} catch let error as NSError {
print(error.localizedDescription)
return nil
}
}
var html2String: String {
return html2AttributedString?.string ?? ""
}
}
And I am using the value in a UILabel inside a UICollectionView.
if let value = mainNote.html2AttributedString
{
cell.note.attributedText = value
}
else
{
cell.note.text = mainNote
}
This method works great. But by default it comes with the "Times New Roman" font with size of 11. So I wanted to make it little bigger. I tried using NSMutableAttributedString.
if let value = mainNote.html2AttributedString
{
let mutableString = NSMutableAttributedString(string: value.string, attributes: [NSFontAttributeName : UIFont(name: "Times New Roman", size: 20)!])
cell.note.attributedText = mutableString
}
else
{
cell.note.text = mainNote
}
Which actually did nothing.
If I increase the font size of UILabel directly then the font size gets increased but the italic attribute does not work.
cell.note.font = UIFont(name: "Times New Roman", size: 16)
Please help me out here to make the String little bigger.

Answer 1

Use this updated extension:
extension String {
func html2AttributedString(font: UIFont?) -> NSAttributedString? {
guard
let data = dataUsingEncoding(NSUTF8StringEncoding)
else { return nil }
do {
let string = try NSAttributedString(data: data, options: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute: NSUTF8StringEncoding], documentAttributes: nil)
let newString = NSMutableAttributedString(attributedString: string)
string.enumerateAttributesInRange(NSRange.init(location: 0, length: string.length), options: .Reverse) { (attributes : [String : AnyObject], range:NSRange, _) -> Void in
if let font = font {
newString.removeAttribute(NSFontAttributeName, range: range)
newString.addAttribute(NSFontAttributeName, value: font, range: range)
}
}
return newString
} catch let error as NSError {
print(error.localizedDescription)
return nil
}
}
var html2String: String {
return html2AttributedString(nil)?.string ?? ""
}
}
Usage:
if let value = mainNote.html2AttributedString(UIFont(name: "Times New Roman-ItalicMT", size: 20))
{
cell.note.attributedText = value
}
else
{
cell.note.text = mainNote
}