我可以阻止我的捕获组被覆盖吗？

Question

我正在尝试捕获 phone 数字中使用的第一个分隔符，以便识别用作数字内部分隔符的内容以及用于分隔两个数字的内容。

现在我可以识别最后一个分隔符。每次拾取新值时，似乎都会覆盖捕获组。无论如何保留使用标志或特定 swift 方法首先捕获的内容？

(?:\d([\-\. ])?){7,15}

Swift方法

func regexParse(pattern:String, captureGroup:Int, caseSensitive:Bool) ->[String]
{
    do
    {
        //Creates empty results array.
        var resultsArray = [String]()

        //Sets Case sensitivity
        var caseSensitivity = NSRegularExpressionOptions.CaseInsensitive
        if(caseSensitive)
        {
            caseSensitivity = NSRegularExpressionOptions.init(rawValue: 0)
        }

        //Sets regex to correct pattern
        let regex = try NSRegularExpression(pattern: pattern, options: caseSensitivity)
        //Converts string to NSString as swift doesn't support regex
        let nsString = self as NSString

        //Sets parsing range to the entire string
        let all = NSMakeRange(0, nsString.length)

        //Enumerates through all matches and extracts the 1st capture bracket for each match and adds it to the resultsArray.

        regex.enumerateMatchesInString(self, options: NSMatchingOptions(rawValue: 0), range: all) { (result: NSTextCheckingResult?, _, _) in
            let capturedRange = result!.rangeAtIndex(captureGroup)
            if !NSEqualRanges(capturedRange, NSMakeRange(NSNotFound, 0))
            {
                let theResult = nsString.substringWithRange(capturedRange)
                resultsArray.append(theResult)
            }
        }
        return resultsArray

    }
    catch
    {
        print("Invalid regex")
        return(["Error"]) //Maybe refactor this for something that's impossible to be a valid result
    }
}

Answer 1

您需要使用这个正则表达式：

\d+([-. ])[-.\d]*

获取分隔符，它将在捕获组中

我可以阻止我的捕获组被覆盖吗？

Can I stop my capture group from being overwritten?

regex

icu

swift