Swift5的正则表达式的写法

override func viewDidLoad() {
        super.viewDidLoad()
        let str = "@codewhey:【动物尖叫合辑】#汽车##安全出行#这么美的女司机，就@鲁军:像是电视剧里面的明星一样，怎么就开大https://www.jianshu.com/p/7b2488721464货车呢 L改车[吃惊]妄想症的微博视频https://www.baidu.com/"
        //       let pattern = "@.*?:"
        //"@codewhey:"
        //        "@鲁军:"
        //        let pattern = "#.*?#" //匹配话题
        //        "#汽车#"
        //        "#安全出行#"
        //let pattern = "\\[.*?\\]" //表情的正则表达 ，.* 表示是0个或多个 。?
        //"[吃惊]"
        let pattern = "((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|(www.[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)"
        guard let regex = try? NSRegularExpression(pattern: pattern, options: []) else{return}
        let results = regex.matches(in: str, options: [], range: NSRange(location: 0, length: str.count))
        for result in results {
            debugPrint((str as NSString).substring(with: result.range)  )
        }
    }