存储时间戳和当前日期之间的差异 [英] Difference between timestamp stored and current date

问题描述

我已经将一个应用程序连接到Firebase数据库。

该应用程序将Firebase的时间作为 timeIntervalSinceReferenceDate 当一个按钮被按下时。这个值的一个例子是 - 498898978852.928 。



我想要这个数字来区分用户是否按下了同一个按钮的时间小于48小时以前。

有没有办法测量48小时的时间段还是应该用不同的方法？

<如果您使用的是Swift 2，请使用NSDate

p>

  //第一个按钮按下，这是一个double，但是假设它是一个timeInterval 
 let firstPress = 498898978.928 
 
 let date = Date（）
 
 let secondPress = date.timeIntervalSinceReferenceDate //第二个按钮按下
 
 let diffInSeconds = secondPress  -  firstPress //总时间差秒
 
 let hours = diffInSeconds / 60/60 // hours = diff in seconds / 60 sec per min / 60 min per hour 
 
 if hours< 
 print（小于48小时的差额）
} else {
 print（大于/等于48小时差额）
} 
  




I have linked up an app that I have made to an Firebase database.

The app sends Firebase the time as a timeIntervalSinceReferenceDate when a button is pressed. An example of the value is - 498898978852.928.

I want this number to distinguish wether the user has pressed that same button more less than 48 hours ago.

Is there a way to measure the time period of 48 hours or should I use a different method?

I am using swift 2 and Xcode 7!

解决方案

Swift 3. If you are using Swift 2, use NSDate

//the first button press, this is a double but assume it's a timeInterval
let firstPress = 498898978.928 

let date = Date()

let secondPress = date.timeIntervalSinceReferenceDate //the second button press

let diffInSeconds = secondPress - firstPress //total time difference in seconds

let hours = diffInSeconds/60/60 //hours=diff in seconds / 60 sec per min / 60 min per hour

if hours < 48 {
     print("less then 48 hours difference")
} else {
     print("greater/equal to 48 hours difference")
}

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