swift之时间戳之间转化

1.时间转时间戳函数

/**
    时间转化为时间戳
    :param: stringTime 时间为stirng
    :returns: 返回时间戳为stirng
*/
static func stringToTimeStamp(stringTime:String)->String {

    var dfmatter = NSDateFormatter()
    dfmatter.dateFormat="yyyy年MM月dd日"
    var date = dfmatter.dateFromString(stringTime)

    var dateStamp:NSTimeInterval = date!.timeIntervalSince1970

    var dateSt:Int = Int(dateStamp)
    print(dateSt)
    return String(dateSt)

}

2. 时间戳转时间函数

/**
    时间戳转时间
    :param: timeStamp <#timeStamp description#>
    :returns: return time
*/
static func timeStampToString(timeStamp:String)->String {

    var string = NSString(string: timeStamp)

    var timeSta:NSTimeInterval = string.doubleValue
    var dfmatter = NSDateFormatter()
    dfmatter.dateFormat="yyyy年MM月dd日"

    var date = NSDate(timeIntervalSince1970: timeSta)

    print(dfmatter.stringFromDate(date))
    return dfmatter.stringFromDate(date)
}