如何在给定时区中获得与特定时间相匹配的日期 - Swift

发布于 2025-01-31 19:36:22 字数 428 浏览 2 评论 0原文

如何获得与给定时区中给定时间匹配的date对象？

例如，我想获得代表下一个CST的date。

我想到了这一点，但是我不确定这是否是最好的方法（如果它根本无法使用）。我也不知道它是否会生成与给定数据组件相匹配的下一个最早日期。苹果文档对此有些不清楚。

let calendar = Calendar(identifier: .gregorian)
let timeZone = TimeZone(abbreviation: "CDT")
let dateComponents = DateComponents(calendar: calendar, timeZone: timeZone, hour: 3)
let date3AM = calendar.date(from: dateComponents)

原文

How can I get a Date object that matches a given time in a given time zone?

For example, I want to get the Date that represents the next 3AM CST.

I thought of this, but I'm not sure if it's the best way (if it even works at all). I also don't know if it generates the next soonest date that matches the given data components. The Apple docs are a little unclear on this.

let calendar = Calendar(identifier: .gregorian)
let timeZone = TimeZone(abbreviation: "CDT")
let dateComponents = DateComponents(calendar: calendar, timeZone: timeZone, hour: 3)
let date3AM = calendar.date(from: dateComponents)

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岁月苍老的讽刺 2025-02-07 19:36:22

实际上，有一种更简单的方法。

var calendar = Calendar(identifier: .gregorian)
calendar.timeZone = TimeZone(abbreviation: "CDT")!
let dateFor3AmCst = calendar.nextDate(after: Date.now, matching: DateComponents(hour: 3), matchingPolicy: .nextTime, repeatedTimePolicy: .first, direction: .forward)!

In fact, there is an easier way.

var calendar = Calendar(identifier: .gregorian)
calendar.timeZone = TimeZone(abbreviation: "CDT")!
let dateFor3AmCst = calendar.nextDate(after: Date.now, matching: DateComponents(hour: 3), matchingPolicy: .nextTime, repeatedTimePolicy: .first, direction: .forward)!

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