ios Swift 将 Unix 时间转换为日期和时间

Swift convert unix time to date and time

提问by MwcsMac

My current code:

我目前的代码：

if  let var timeResult = (jsonResult["dt"] as? Double) {
    timeResult = NSDate().timeIntervalSince1970
    println(timeResult)
    println(NSDate())
}

The results:

结果：

println(timeResult)= 1415639000.67457

println(timeResult)= 1415639000.67457

println(NSDate())= 2014-11-10 17:03:20 +0000 was just to test to see what NSDatewas providing.

println(NSDate())= 2014-11-10 17:03:20 +0000 只是为了测试看看NSDate提供了什么。

I want the first to look like the last. The value for dt = 1415637900.

我希望第一个看起来像最后一个。dt 的值 = 1415637900。

Also, how can I adjust to time zone? Running on iOS.

另外，我怎样才能适应时区？在iOS 上运行。

采纳答案by MwcsMac

To get the date to show as the current time zone I used the following.

为了让日期显示为当前时区，我使用了以下内容。

if let timeResult = (jsonResult["dt"] as? Double) {
     let date = NSDate(timeIntervalSince1970: timeResult)
     let dateFormatter = NSDateFormatter()
     dateFormatter.timeStyle = NSDateFormatterStyle.MediumStyle //Set time style
     dateFormatter.dateStyle = NSDateFormatterStyle.MediumStyle //Set date style
     dateFormatter.timeZone = NSTimeZone()
     let localDate = dateFormatter.stringFromDate(date)
}

Swift 3.0 Version

斯威夫特 3.0 版本

if let timeResult = (jsonResult["dt"] as? Double) {
    let date = Date(timeIntervalSince1970: timeResult)
    let dateFormatter = DateFormatter()
    dateFormatter.timeStyle = DateFormatter.Style.medium //Set time style
    dateFormatter.dateStyle = DateFormatter.Style.medium //Set date style
    dateFormatter.timeZone = self.timeZone
    let localDate = dateFormatter.string(from: date)                     
}

Swift 5

斯威夫特 5

if let timeResult = (jsonResult["dt"] as? Double) {
    let date = Date(timeIntervalSince1970: timeResult)
    let dateFormatter = DateFormatter()
    dateFormatter.timeStyle = DateFormatter.Style.medium //Set time style
    dateFormatter.dateStyle = DateFormatter.Style.medium //Set date style
    dateFormatter.timeZone = .current
    let localDate = dateFormatter.string(from: date)                                
}

回答by Nate Cook

You can get a date with that value by using the NSDate(withTimeIntervalSince1970:)initializer:

您可以使用NSDate(withTimeIntervalSince1970:)初始化程序获取具有该值的日期：

let date = NSDate(timeIntervalSince1970: 1415637900)

回答by Sachin Tyagi

It's simple to convert the Unix timestamp into the desired format. Lets suppose _ts is the Unix timestamp in long

将 Unix 时间戳转换为所需的格式很简单。让我们假设 _ts 是 long 中的 Unix 时间戳

let date = NSDate(timeIntervalSince1970: _ts)

let dayTimePeriodFormatter = NSDateFormatter()
dayTimePeriodFormatter.dateFormat = "MMM dd YYYY hh:mm a"

 let dateString = dayTimePeriodFormatter.stringFromDate(date)

  print( " _ts value is \(_ts)")
  print( " _ts value is \(dateString)")

回答by crobicha

For managing dates in Swift 3I ended up with this helper function:

为了在Swift 3 中管理日期，我最终使用了这个辅助函数：

extension Double {
    func getDateStringFromUTC() -> String {
        let date = Date(timeIntervalSince1970: self)

        let dateFormatter = DateFormatter()
        dateFormatter.locale = Locale(identifier: "en_US")
        dateFormatter.dateStyle = .medium

        return dateFormatter.string(from: date)
    }
}

This way it easy to use whenever you need it - in my case it was converting a string:

这样就可以在需要时轻松使用 - 在我的情况下，它正在转换字符串：

("1481721300" as! Double).getDateStringFromUTC() // "Dec 14, 2016"

Reference the DateFormatterdocs for more details on formatting (Note that some of the examples are out of date)

有关格式的更多详细信息，请参考DateFormatter文档（请注意，某些示例已过时）

I found this articleto be very helpful as well

我发现这篇文章也很有帮助

回答by zeeshan

Here is a working Swift 3solution from one of my apps.

这是来自我的一个应用程序的有效Swift 3解决方案。

/**
 * 
 * Convert unix time to human readable time. Return empty string if unixtime     
 * argument is 0. Note that EMPTY_STRING = ""
 *
 * @param unixdate the time in unix format, e.g. 1482505225
 * @param timezone the user's time zone, e.g. EST, PST
 * @return the date and time converted into human readable String format
 *
 **/

private func getDate(unixdate: Int, timezone: String) -> String {
    if unixdate == 0 {return EMPTY_STRING}
    let date = NSDate(timeIntervalSince1970: TimeInterval(unixdate))
    let dayTimePeriodFormatter = DateFormatter()
    dayTimePeriodFormatter.dateFormat = "MMM dd YYYY hh:mm a"
    dayTimePeriodFormatter.timeZone = NSTimeZone(name: timezone) as TimeZone!
    let dateString = dayTimePeriodFormatter.string(from: date as Date)
    return "Updated: \(dateString)"
}

回答by Durul Dalkanat

func timeStringFromUnixTime(unixTime: Double) -> String {
    let date = NSDate(timeIntervalSince1970: unixTime)

    // Returns date formatted as 12 hour time.
    dateFormatter.dateFormat = "hh:mm a"
    return dateFormatter.stringFromDate(date)
}

func dayStringFromTime(unixTime: Double) -> String {
    let date = NSDate(timeIntervalSince1970: unixTime)
    dateFormatter.locale = NSLocale(localeIdentifier: NSLocale.currentLocale().localeIdentifier)
    dateFormatter.dateFormat = "EEEE"
    return dateFormatter.stringFromDate(date)
}

回答by Juan Boero

Swift:

迅速：

extension Double {
    func getDateStringFromUnixTime(dateStyle: DateFormatter.Style, timeStyle: DateFormatter.Style) -> String {
        let dateFormatter = DateFormatter()
        dateFormatter.dateStyle = dateStyle
        dateFormatter.timeStyle = timeStyle
        return dateFormatter.string(from: Date(timeIntervalSince1970: self))
    }
}

回答by Divyansh Jain

In Swift 5

在斯威夫特 5

Using this implementation you just have to give epoch time as a parameter and you will the output as (1 second ago, 2 minutes ago, and so on).

使用此实现，您只需提供纪元时间作为参数，您将输出为（1 秒前、2 分钟前，依此类推）。

func setTimestamp(epochTime: String) -> String {
    let currentDate = Date()
    let epochDate = Date(timeIntervalSince1970: TimeInterval(epochTime) as! TimeInterval)

    let calendar = Calendar.current

    let currentDay = calendar.component(.day, from: currentDate)
    let currentHour = calendar.component(.hour, from: currentDate)
    let currentMinutes = calendar.component(.minute, from: currentDate)
    let currentSeconds = calendar.component(.second, from: currentDate)

    let epochDay = calendar.component(.day, from: epochDate)
    let epochMonth = calendar.component(.month, from: epochDate)
    let epochYear = calendar.component(.year, from: epochDate)
    let epochHour = calendar.component(.hour, from: epochDate)
    let epochMinutes = calendar.component(.minute, from: epochDate)
    let epochSeconds = calendar.component(.second, from: epochDate)

    if (currentDay - epochDay < 30) {
        if (currentDay == epochDay) {
            if (currentHour - epochHour == 0) {
                if (currentMinutes - epochMinutes == 0) {
                    if (currentSeconds - epochSeconds <= 1) {
                        return String(currentSeconds - epochSeconds) + " second ago"
                    } else {
                        return String(currentSeconds - epochSeconds) + " seconds ago"
                    }

                } else if (currentMinutes - epochMinutes <= 1) {
                    return String(currentMinutes - epochMinutes) + " minute ago"
                } else {
                    return String(currentMinutes - epochMinutes) + " minutes ago"
                }
            } else if (currentHour - epochHour <= 1) {
                return String(currentHour - epochHour) + " hour ago"
            } else {
                return String(currentHour - epochHour) + " hours ago"
            }
        } else if (currentDay - epochDay <= 1) {
            return String(currentDay - epochDay) + " day ago"
        } else {
            return String(currentDay - epochDay) + " days ago"
        }
    } else {
        return String(epochDay) + " " + getMonthNameFromInt(month: epochMonth) + " " + String(epochYear)
    }
}


func getMonthNameFromInt(month: Int) -> String {
    switch month {
    case 1:
        return "Jan"
    case 2:
        return "Feb"
    case 3:
        return "Mar"
    case 4:
        return "Apr"
    case 5:
        return "May"
    case 6:
        return "Jun"
    case 7:
        return "Jul"
    case 8:
        return "Aug"
    case 9:
        return "Sept"
    case 10:
        return "Oct"
    case 11:
        return "Nov"
    case 12:
        return "Dec"
    default:
        return ""
    }
}

How to call?

怎么打电话？

setTimestamp(epochTime: time)and you'll get the desired output as a string.

setTimestamp(epochTime: time)您将获得所需的输出作为字符串。

回答by swiftBoy

Anyway @Nate Cook'sanswer is accepted but I would like to improve it with better date format.

无论如何@Nate Cook 的回答被接受，但我想用更好的日期格式来改进它。

with Swift 2.2, I can get desired formatted date

使用Swift 2.2，我可以获得所需的格式化日期

//TimeStamp
let timeInterval  = 1415639000.67457
print("time interval is \(timeInterval)")

//Convert to Date
let date = NSDate(timeIntervalSince1970: timeInterval)

//Date formatting
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "dd, MMMM yyyy HH:mm:a"
dateFormatter.timeZone = NSTimeZone(name: "UTC")
let dateString = dateFormatter.stringFromDate(date)
print("formatted date is =  \(dateString)")

---

---

the result is

结果是

time interval is 1415639000.67457

formatted date is = 10, November 2014 17:03:PM

时间间隔为1415639000.67457

格式化日期为 = 2014 年 11 月 10 日 17:03:PM

回答by Nil Rathod

Convert timestamp into Date object.

将时间戳转换为日期对象。

If timestamp object is invalid then return current date.

如果时间戳对象无效，则返回当前日期。

class func toDate(_ timestamp: Any?) -> Date? {
    if let any = timestamp {
        if let str = any as? NSString {
            return Date(timeIntervalSince1970: str.doubleValue)
        } else if let str = any as? NSNumber {
            return Date(timeIntervalSince1970: str.doubleValue)
        }
    }
    return nil
}