没有时间的ios Swift日期 [英] ios Swift Date without Time

问题描述

我试图只获取意味着小时、分钟、秒为零的日期.这就是我正在尝试的

I am trying to get only date that means hours, mins, seconds are zeroes. This is what i am trying

extension Date {

    var onlyDate: Date? {
        get {
            let calender = Calendar.current
            var dateComponents = calender.dateComponents([.year, .month, .day], from: self)
            dateComponents.timeZone = NSTimeZone.system
            return calender.date(from: dateComponents)
        }
    }

}

当我尝试

date = Date().onlyDate 

它返回上一个日期.您可以查看它给我的屏幕截图，它是 4 月 14 日，而它应该是 15 日

It returns the previous date. You can check the screenshot that its giving me 14th April while it should have been 15th

推荐答案

让我猜猜，你在 GMT+6 时区，不是吗?

Let me guess, you are in the GMT+6 time zone, aren't you?

打印Date时，它们总是以UTC显示.

When Dates are printed, they always show up in UTC.

2019-04-14 18:00 UTC 与 2019-04-15 00:00 在您当地的时区相同.

2019-04-14 18:00 UTC is the same as 2019-04-15 00:00 in your local time zone.

你的代码没有错.它工作正常.

Your code is not wrong. It works fine.

要在您的时区查看它，请使用 DateFormatter 并设置 timeZone 属性:

To see it in your time zone, use a DateFormatter and set the timeZone property:

let formatter = DateFormatter()
formatter.timeStyle = .none
formatter.dateStyle = .full
formatter.timeZone = TimeZone.current
print(formatter.string(from: Date().onlyDate))

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