swift 检查字符串是否为URL

Posted 2021-05-19

        do {
            let dataDetector: NSDataDetector = try NSDataDetector.init(types: NSTextCheckingResult.CheckingType.link.rawValue)
            
            let stringRange = NSMakeRange(0, url.characters.count)
            let notFoundRange = NSMakeRange(NSNotFound, 0)
            
            let linkRange = dataDetector.rangeOfFirstMatch(in: url, options: NSRegularExpression.MatchingOptions(rawValue: UInt(0)), range: stringRange)

            if (!NSEqualRanges(notFoundRange, linkRange) && NSEqualRanges(stringRange, linkRange)) {
                return true;
            }
            
            return false
        } catch {
            NSLog("String is not an URL")
            return false
        }