問(wèn)題描述

我正在嘗試制作一個(gè)考勤應(yīng)用程序，但我對(duì) iOS 和 Firebase 中的日期和時(shí)間感到非常困惑.

I'm trying to make an attendance app and I am really confused about date and time in iOS and Firebase.

我使用日期作為 Key，這是我的 Firebase 數(shù)據(jù)庫(kù)的結(jié)構(gòu).

I use date as Key, this is the structure of my Firebase database.

--Employees
  --Unique_ID
     --Details
          Name: John
     --Attendance
          --dateToday
              Timein: 8:00 AM
              Timeout: 5:00 PM
              BreakStart: 12:00 PM
              BreakFinish: 1:00 PM

這是獲取我用作密鑰的日期時(shí)間戳的代碼

This is my code to get the date timestamp I used as Key

 override func viewDidLoad() {
     super.viewDidLoad()

     let now = NSDate()
     let nowTimeStamp = self.getCurrentTimeStampWOMiliseconds(dateToConvert: now)

     // I save this dateToday as Key in Firebase
     dateToday = nowTimeStamp
}


func getCurrentTimeStampWOMiliseconds(dateToConvert: NSDate) -> String {
    let objDateformat: DateFormatter = DateFormatter()
    objDateformat.dateFormat = "yyyy-MM-dd"
    let strTime: String = objDateformat.string(from: dateToConvert as Date)
    let objUTCDate: NSDate = objDateformat.date(from: strTime)! as NSDate
    let milliseconds: Int64 = Int64(objUTCDate.timeIntervalSince1970)
    let strTimeStamp: String = "(milliseconds)"
    return strTimeStamp
}

但是當(dāng)我將它轉(zhuǎn)換回日期時(shí)，我得到 2017-09-22 16:00:00 +0000，這是錯(cuò)誤的，因?yàn)樵谖业奈恢檬?9 月 23 日.

But when I convert it back to date I get 2017-09-22 16:00:00 +0000, which is wrong because it is 23rd of September in my location.

什么是正確的代碼，以便我可以獲得正確的日期時(shí)間戳和時(shí)間時(shí)間戳?

What is the right code to use so that I can get the correct date timestamp and time timestamp?

推薦答案

為了將當(dāng)前時(shí)間保存到 firebase 數(shù)據(jù)庫(kù)，我使用了 Unic Epoch Conversation:

For saving Current time to firebase database I use Unic Epoch Conversation:

let timestamp = NSDate().timeIntervalSince1970

用于將 Unix 紀(jì)元時(shí)間解碼為 Date().

and For Decoding Unix Epoch time to Date().

let myTimeInterval = TimeInterval(timestamp)
let time = NSDate(timeIntervalSince1970: TimeInterval(myTimeInterval))

這篇關(guān)于iOS Swift - 獲取當(dāng)前本地時(shí)間和日期時(shí)間戳的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！