hexDigit

A character class that matches any hexadecimal digit.

iOS
16.0+
macOS
13.0+
tvOS
16.0+
watchOS
9.0+
static var hexDigit: CharacterClass { get }

hexDigit matches the ASCII characters 0 through 9, and upper- or lowercase a through f. The corresponding characters in the “Halfwidth and Fullwidth Forms” Unicode block are not matched by this character class.