Swift rang to NSRange

主要代码

let location = att.string.range(of: "\(count)")

NSRange(location, in: att.string)

let count: Int = 56
        let att = NSMutableAttributedString(string: "\(count)件礼物")
        guard let location = att.string.range(of: "\(count)") else {
            return
        }
        let range = NSRange(location, in: att.string)
        att.yy_setAttribute(NSAttributedString.Key.font.rawValue, value: UIFont.systemFont(ofSize: 13), range: range)
        att.yy_setAttribute(NSAttributedString.Key.foregroundColor.rawValue, value: UIColor(colorType: .C34), range: range)
        haveLightLabel.attributedText = att