NSDataDetector,字符串中检测URL

NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink error:&error];NSArray *matches = [detector matchesInString:textString options:0 range:NSMakeRange(0, textString.length)];for (NSTextCheckingResult *match in matches) {    if ([match resultType] == NSTextCheckingTypeLink) {        NSRange matchRange = [match range];

NSURL *url = [match URL];

    }

}