ios - 从字符串中提取 5 位邮政编码

Question

我让用户输入他们的地址，我需要从中提取邮政编码。

我发现这个 RegEx 应该可以工作:\d{5}([\-]\d{4})? 但是我很难让它在 Swift 上工作.

这就是我所在的地方:

private func sanatizeZipCodeString() -> String {
        let retVal = self.drugNameTextField.text

        let regEx = try! NSRegularExpression(pattern: "", options: .CaseInsensitive)

        let match = regEx.matchesInString(retVal!, options: [], range: NSMakeRange(0, (retVal?.characters.count)!))

        for zip in match {
            let matchRange = zip.range

        }
    }

我不明白为什么我不能直接拉出第一个匹配的字符串!

Answer 1

你可以试试这个

func match() {
    do {
        let regex = try NSRegularExpression(pattern: "\\b\\d{5}(?:[ -]\\d{4})?\\b", options: [])
        let retVal = "75463 72639823764 gfejwfh56873 89765"
        let str = retVal as NSString
        let postcodes = regex.matchesInString(retVal,
        options: [], range: NSMakeRange(0, retVal.characters.count))
        let postcodesArr =  postcodes.map { str.substringWithRange($0.range)}
        // postcodesArr[0] will give you first postcode
    } catch let error as NSError {

    }
}