带空格的正则表达式编号

Question

您好，我正在运行最近的WWDC的文本识别示例，并且其中有正则表达式方法发生，我不确定它是如何工作的。有人能帮我吗？我从没使用过regex

let pattern = #"""

    (?x)                    # Verbose regex, allows comments
    (?:\+1-?)?              # Potential international prefix, may have -
    \b(\w{1, 4})            # Potential XXXX (
    [\  ./]?                # Capture  espace
    \b(\w{1, 4})            # Potential XXXX )
    [\  ./]?                # Potential espace
    (\w{1, 4})              # Capture xxxx
    [\  ./]?                # Potential space
    (\w{1, 3})\b            # Capture xxxx

    """#

但不起作用

我已经对此进行了测试

let auxString = "1234 1234 1234 123"

    guard let range1 = auxString.range(of: pattern, options: .regularExpression, range: nil, locale: nil) else {
        // No phone number found.
        print("no number found")

        return nil
    }