swift 字符串转时间 时间转字符串

classfuncfromDateToString(date:Date) ->String{

letdformatter =DateFormatter()

dformatter.dateFormat="yyyy年MM月dd日HH:mm:ss"

letdateStr = dformatter.string(from: date)

returndateStr

}

classfuncfromStringToDate(string :String) ->Date{

letdformatter =DateFormatter()

dformatter.dateFormat="yyyy年MM月dd日HH:mm:ss"

letdate = dformatter.date(from: string)

returndate!

}