class IndentedLabel: UILabel {
    override func drawText(in rect: CGRect) {
        let insets = UIEdgeInsets(top: 0, left: 16, bottom: 0, right: 0)

        // let customRect = UIEdgeInsetsInsetRect(rect, insets) Swift 4.0

        // Swift 4.2~
        let customRect = rect.inset(by: insets)
        super.drawText(in: customRect)
    }
}