SmallCaps.swift

    let pointSize: CGFloat = 60
    let systemFontDesc = UIFont.systemFont(ofSize: pointSize, weight: UIFont.Weight.light).fontDescriptor
    let smallCapsFontDesc = systemFontDesc.addingAttributes(
      [
        UIFontDescriptor.AttributeName.featureSettings:
          [
            [
              kCTFontFeatureTypeIdentifierKey: kLowerCaseType,
              kCTFontFeatureSelectorIdentifierKey: kLowerCaseSmallCapsSelector
            ]
        ]
      ]
    )

    label.text = "Some text"
    label.font = UIFont(descriptor: smallCapsFontDesc, size: label.font.pointSize)