String Extension for Formatting AttributedStrings

StringExtension

extension String
{
    func attributeString(font1:UIFont, font2:UIFont, color1:UIColor = UIColor.blackColor(), color2:UIColor = UIColor.blackColor()) -> NSAttributedString
    {
        let attributes1 = [NSFontAttributeName:font1, NSForegroundColorAttributeName:color1]
        let attributes2 = [NSFontAttributeName:font2, NSForegroundColorAttributeName:color2]
        return attributeString("|", attributes1:attributes1, attributes2:attributes2)
    }
    
    func attributeString(delimiter:Character, attributes1:[String:AnyObject], attributes2:[String:AnyObject]) -> NSAttributedString
    {
        let textArray = markedString.characters.split{$0 == delimiter}.map(String.init)
        let mutableAttributedString = NSMutableAttributedString()
        for index in 0..<textArray.count
        {
            let currentString = textArray[index]
            var attributes = [String:AnyObject]()
            if index % 2 == 0
            {
                attributes = attributes1
            }
            else
            {
                attributes = attributes2
            }
            let attributedString = NSAttributedString(string:currentString, attributes:attributes)
            mutableAttributedString.appendAttributedString(attributedString)
        }
        return NSAttributedString(attributedString:mutableAttributedString)
    }
    
}


var markedString = "Make |this text bold|. But not this text."
let outerFont = UIFont(name:"HelveticaNeue-Light", size:18)!
let innerFont = UIFont(name:"HelveticaNeue-Bold", size:20)!
markedString.attributeString(outerFont, font2:innerFont)