在swift 3中获得两次时间差

时间:2017-12-25 08:54:49

标签: swift3 nstimeinterval

我有2个变量,我从datePicker得到2次,我需要在变量上保存它们之间的差异。

    let timeFormatter = DateFormatter()
    timeFormatter.dateFormat = "HHmm"

    time2 = timeFormatter.date(from: timeFormatter.string(from: datePicker.date))!

我试图从他们两个获得timeIntervalSince1970并且他们减去它们并获得毫秒的差异,我将回到小时和分钟,但是我得到一个非常大的数字,它与实际时间不对应

let dateTest = time2.timeIntervalSince1970 - time1.timeIntervalSince1970

然后我尝试使用time2.timeIntervalSince(date:time1),但结果毫秒数远远超过实际时间。

如何获得2次正确的时差,并将结果显示为格式为“0823”的小时和分钟,持续8小时23分钟?

4 个答案:

答案 0 :(得分:8)

TimeInterval测量的是秒,而不是毫秒:

let date1 = Date()
let date2 = Date(timeIntervalSinceNow: 12600) // 3:30

let diff = Int(date2.timeIntervalSince1970 - date1.timeIntervalSince1970)

let hours = diff / 3600
let minutes = (diff - hours * 3600) / 60

答案 1 :(得分:8)

进行任何日期数学运算的推荐方法是CalendarDateComponents

let difference = Calendar.current.dateComponents([.hour, .minute], from: time1, to: time2)
let formattedString = String(format: "%02ld%02ld", difference.hour!, difference.minute!)
print(formattedString)

格式%02ld添加填充零。

如果您需要在小时和分钟之间使用冒号的标准格式DateComponentsFormatter()可能是更方便的方式

let formatter = DateComponentsFormatter()
formatter.allowedUnits = [.hour, .minute]
print(formatter.string(from: time1, to: time2)!)

答案 2 :(得分:3)

要在两个时间间隔之间以为单位获取持续时间,可以使用-

let time1 = Date(timeIntervalSince1970: startTime)
let time2 = Date(timeIntervalSince1970: endTime)
let difference = Calendar.current.dateComponents([.second], from: time1, to: time2)
let duration = difference.second

答案 3 :(得分:0)

现在您可以通过这种方式迅速完成5

func getDateDiff(start: Date, end: Date) -> Seconds  {
    let calendar = Calendar.current
    let dateComponents = calendar.dateComponents([Calendar.Component.second], from: start, to: end)

    let seconds = dateComponents.second
    return Seconds(seconds!)
}