Custom Fonts in iOS

UIFont+font.swift

import UIKit

extension UIFont {
    /// Returns the font in the specified size and weight. Default weight is `regular`
    open class func font(ofSize fontSize: CGFloat, weight: FontWeight = .regular) -> UIFont {
        let fontName = "UniversNextPro-\(weight.rawValue)"
        guard let font = UIFont(name: fontName, size: fontSize) else {
            fatalError("\(fontName) not found")
        }
        return font
    }
    /// Returns the custom font with monospaced digits in the specified size and weight. Default weight is `regular`
    open class func monospacedDigitFont(ofSize fontSize: CGFloat, weight: FontWeight = .regular) -> UIFont {
        let font = self.font(ofSize: fontSize, weight: weight)
        let fontDescriptorFeatureSettings = [
            [
                UIFontFeatureTypeIdentifierKey: kNumberSpacingType,
                UIFontFeatureSelectorIdentifierKey: kMonospacedNumbersSelector
            ]
        ]
        let fontDescriptorAttributes = [
            UIFontDescriptorFeatureSettingsAttribute: fontDescriptorFeatureSettings
        ]
        let fontDescriptor = font.fontDescriptor.addingAttributes(fontDescriptorAttributes)
        
        return UIFont(descriptor: fontDescriptor, size: fontDescriptor.pointSize)
    }
}