Set and remove underline to UIButton iOS swift

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 Solution:

extension UIButton {

    func underline(text: String) {

        let attributedString = NSMutableAttributedString(string: text)

        attributedString.addAttribute(NSAttributedString.Key.underlineColor, value: self.titleColor(for: .normal)!, range: NSRange(location: 0, length: text.count))

        attributedString.addAttribute(NSAttributedString.Key.foregroundColor, value: self.titleColor(for: .normal)!, range: NSRange(location: 0, length: text.count))

        attributedString.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue, range: NSRange(location: 0, length: text.count))

        self.setAttributedTitle(attributedString, for: .normal)

    }

    

    // MARK: - Remove underLine

    func removeUnderline(text: String) {

        let attributedString = NSMutableAttributedString(string: text)

        attributedString.addAttribute(NSAttributedString.Key.underlineColor, value: self.titleColor(for: .normal)!, range: NSRange(location: 0, length: text.count))

        attributedString.addAttribute(NSAttributedString.Key.foregroundColor, value: self.titleColor(for: .normal)!, range: NSRange(location: 0, length: text.count))

        self.setAttributedTitle(attributedString, for: .normal)

    }

}

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