where 
string = "2019-11-30 11:59:59.0" 
format: "yyyy-MM-dd HH:mm:ss.S"   
 func stringToDate(_ string: String, format: String) -> Date?
    {
        let dateStringFormatter = DateFormatter()
        dateStringFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss.S"
        dateStringFormatter.timeZone = TimeZone.current
        dateStringFormatter.locale = Locale.current
        let date = dateStringFormatter.date(from: string)
        
        
        return date//dateStringFormatter.date(from: string)
    }