import UIKit

class DateUtil {
    class func getCurrentDate(format:String = "YYYY-MM-dd HH:mm:ss")->String {
        var f = NSDateFormatter()
        f.dateFormat = format
        return f.stringFromDate(NSDate())
    }
}


class StringUtil {
    class func trim(str:String)->String {
        return str.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet())
    }
}