UIFont extension for monospaced font.

UIFont+Monospace.swift

import UIKit

extension UIFont {
    
    static func monospacedFont(at size: CGFloat) -> UIFont{
        let bodyFontDescriptor = UIFontDescriptor.preferredFontDescriptor(withTextStyle: UIFont.TextStyle.body)
        
        let bodyMonospacedNumbersFontDescriptor = bodyFontDescriptor.addingAttributes(
            [
                UIFontDescriptor.AttributeName.featureSettings: [
                    [
                        UIFontDescriptor.FeatureKey.featureIdentifier: kNumberSpacingType,
                        UIFontDescriptor.FeatureKey.typeIdentifier: kMonospacedNumbersSelector
                    ]
                ]
            ])
        return UIFont(descriptor: bodyMonospacedNumbersFontDescriptor, size: size)
    }
}