iOS设置UILabel的不同颜色字体

//        设置不同的字体

        let str:NSMutableAttributedString =
NSMutableAttributedString.init(string: priceStr)

        str.addAttribute(NSForegroundColorAttributeName, value:
RGBCOLOR(r: 102,
102, 102,
1), range: NSRange.init(location:
0, length: 5))

        str.addAttribute(NSFontAttributeName, value:
UIFont.init(name:
"HelveticaNeue-Bold", size:
14)!, range: NSRange.init(location:
0, length: 5))

        cell.productCellPriceLab.attributedText = str