[swift] Util(String)

StringExt

public extension String {

    

    //Date format change

    //ex -> "20171201".date(inputFormat: "yyyyMMdd", outputFormat: "yyyy.MM.dd")

    func date(inputFormat: String, outputFormat:String) -> String? {

        if self.isEmpty { return ""}

        

        let dateFormatter = DateFormatter()

        dateFormatter.dateFormat = inputFormat

        if let date = dateFormatter.date(from: self) {

            dateFormatter.dateFormat = outputFormat

            return dateFormatter.string(from: date)

        }

        

        return self

    }

    

    //Highlight Ward

    //ex -> "123".highlightSubwordWithColor("1", color: .red)

    func highlightSubwordWithColor(_ searchWord:String, color:UIColor) -> NSAttributedString {

        

        let attributedText = NSMutableAttributedString(string: self)

        let nsstring = self as NSString

        var range = nsstring.range(of: searchWord, options: NSString.CompareOptions.caseInsensitive, range: NSMakeRange(0, nsstring.length))

        range = nsstring.range(of: searchWord, options: NSString.CompareOptions.caseInsensitive, range: NSMakeRange(0, nsstring.length))

        while range.location != NSNotFound {

            

            attributedText.addAttribute(NSAttributedStringKey.foregroundColor, value: color, range: range)

            range = nsstring.range(of: searchWord, options: NSString.CompareOptions.caseInsensitive, range: NSMakeRange(range.location+1, nsstring.length-range.location-1))

        }

        return attributedText

    }

}