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