Set the Italic to the UITextView iOS swift

-
Solution:
    @IBAction func didTapOnItalic(_ sender: Any) {
        let textV = self.TextView
        if textV != nil {
            
            var fonts = textV.font
            fonts = (fonts?.isItalic)! ? fonts?.removeitalic() : fonts?.setItalic()
textV.fontName = fonts!.fontName



        }
    }



extension UIFont

{

    var isItalic: Bool
    {
        return fontDescriptor.symbolicTraits.contains(.traitItalic)
    }

    func setItalic()-> UIFont
    {
        if isItalic {
            return self
            
        } else {
            var symTraits = fontDescriptor.symbolicTraits
            symTraits.insert([.traitItalic])
            let fontDescriptorVar = fontDescriptor.withSymbolicTraits(symTraits)
            return UIFont(descriptor: fontDescriptorVar!, size: 0)
        }    }


func removeitalic()-> UIFont
    {
        if !isItalic {
            return self
        } else {
            var symTraits = fontDescriptor.symbolicTraits
            symTraits.remove([.traitItalic])
            let fontDescriptorVar = fontDescriptor.withSymbolicTraits(symTraits)
            return UIFont(descriptor: fontDescriptorVar!, size: 0)
        }
    }
}

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