swift Strinfから强タグで囲まれた要素を抽出する

Posted 2021-05-19

private func getStrongStrings(_ text: String) -> [String]? {
    let pattern = "(?<=<strong>)(.[^>]*)(?=</strong>)"
    guard let regex = try? NSRegularExpression(pattern: pattern) else {
        Log.fatal(message: "regular expression pattern is invalid")
        return nil
    }

    let matches = regex.matches(in: text, range: NSRange(text.startIndex..., in: text))
    let strings = matches.map {
        String(text[Range($0.range, in: text)!])
    }
    return strings
}