iOS11 から正規表現で名前付きキャプチャが使える - Qiita

func yearMonthDay(from target: String) -> (year: Int, month: Int, day: Int)? { let pattern = "(?<year>\\d+)-(?<month>\\d+)-(?<day>\\d+)" let regex = try! NSRegularExpression(pattern: pattern, options: []) let nsTarget = target as NSString let nsRange = NSRange(location: 0, length: nsTarget.length) guard let result = regex.firstMatch(in: target, options: [], range: nsRange) else { return nil } retu