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[英]How to get current date from current timezone from a time server in Swift?
[英]How to get store opening hours in local timezone from given date-time response? - SWIFT 5
我从 Json 回复中得到营业时间,我想计算商店目前是否营业?
我的 Json 回复如下所示:
{
"endDay":2,
"endTime":"03:00",
"startDay":1,
"startTime":"11:00"
},
{
"endDay":3,
"endTime":"03:00",
"startDay":2,
"startTime":"11:00"
},
...
我在这个 Json 响应中有 7 个字典(星期日到星期一),其中startDay
和endDay
代表工作日。 (星期日 = 0,依此类推。)
以上所有时间都是 UTC,但我想在我当地的时区进行计算。
实际问题是找出“日”转换的差异。 我可以只转换时间,但不知道如何管理计算第二天或前一天的时区差异?
我正在使用 XCode 12 和 Swift 5。提前感谢您的帮助。 谢谢。
这是将 GMT 中的工作日和时间转换为 PST 时区:
let weekday = 2 // weekday == 1 is Sunday
let hour = 4 // 4:00 am in GMT+0
let minute = 0 // in GMT+0
guard let timeZone = TimeZone(secondsFromGMT: 0) else { return }
var calendar = Calendar(identifier: .gregorian) // Should be the calendar that is used by your server
calendar.timeZone = timeZone
let date = Date()
let dateComponents = calendar.dateComponents(Set(arrayLiteral: Calendar.Component.weekday,
Calendar.Component.hour,
Calendar.Component.minute), from: date)
var dateComponentsDiff = DateComponents()
dateComponentsDiff.day = weekday - dateComponents.weekday!
dateComponentsDiff.hour = hour - dateComponents.hour!
dateComponentsDiff.minute = minute - dateComponents.minute!
guard let arbitraryDate = calendar.date(byAdding: dateComponentsDiff, to: date),
let pstTimeZone = TimeZone(abbreviation: "PST") else { return }
let pstDateComponents = calendar.dateComponents(in: pstTimeZone, from: arbitraryDate)
print("WEEK DAY: \(pstDateComponents.weekday!)\nTIME: \(pstDateComponents.hour!):\(pstDateComponents.minute!)")
Output:
WEEK DAY: 1
TIME: 20:0
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