iOS 檢測文本中的URL、電話號碼等信息

func showAttributedStringLink(_ attributedStr: NSMutableAttributedString) {
  // We check URL and phone number
  let types: UInt64 = NSTextCheckingResult.CheckingType.link.rawValue | NSTextCheckingResult.CheckingType.phoneNumber.rawValue
  // Get NSDataDetector
  guard let detector: NSDataDetector = try? NSDataDetector(types: types) else { return }
  // Get NSTextCheckingResult array
  let matches: [NSTextCheckingResult] = detector.matches(in: attributedStr.string, options: NSRegularExpression.MatchingOptions(rawValue: 0), range: NSRange(location: 0, length: attributedStr.length))
  // Go through and check result
  for match in matches {
    if match.resultType == .link, let url = match.url {
      // Get URL
      attributedStr.addAttributes([ NSLinkAttributeName : url,
                     NSForegroundColorAttributeName : UIColor.blue,
                     NSUnderlineStyleAttributeName : NSUnderlineStyle.styleSingle.rawValue ],
                    range: match.range)
    } else if match.resultType == .phoneNumber, let phoneNumber = match.phoneNumber {
      // Get phone number
      attributedStr.addAttributes([ NSLinkAttributeName : phoneNumber,
                     NSForegroundColorAttributeName : UIColor.blue,
                     NSUnderlineStyleAttributeName : NSUnderlineStyle.styleSingle.rawValue ],
                    range: match.range)
    }
  }
}