CODEWITHSUNDEEP
iosswift
Blue
Blue

Reputation: 1448

How to get time mode in swift 12hr vs 24hr from device

Question is rather simple. I'm trying to figure how to tell what time format the current device is in. I'm assuming its something simple like with languages -> Local.current.languageCode. When I search I keep getting results for conversions.

Upvotes: 0

Views: 92

Answers (2)

Jason Campbell
Jason Campbell

Reputation: 543

Although the feature wasn't available when you asked, since iOS 16 and macOS 13 you can also look at the current Locale's hourCycle value:

if Locale.current.hourCycle == .oneToTwelve 
    || Locale.current.hourCycle == .zeroToEleven {
    ...
}

Note there are not 2, but instead 4 different possibilities (0-11, 1-12, 0-23, 1-24). The 0- vs 1- distinctions are important between between midnight and 1am, and again between noon and 1pm. For instance, one minute after midnight could be written four ways: 0:01, 0:01am, 12:01am, and 24:01. See Apple's docs, or the Unicode Common Locale Data Repository definitions for HourCycle at https://www.unicode.org/reports/tr35/#UnicodeHourCycleIdentifier .

And, although this value is coming from the Locale, it does reflect any 12/24-hour time preference the user may have set. (At least it does when you query Locale.current)

Upvotes: 1

Leo Dabus
Leo Dabus

Reputation: 236498

You can create a date format from a template passing "j" and .current locale. If the resulting format contains the letter "a" means that the date format for that specific locale is set to 12 hours:

extension Locale {
    var is24Hour: Bool {
        DateFormatter.dateFormat(fromTemplate: "j", options: 0, locale: self)?.contains("a") == false
    }
}

Playground testing:

if Locale.current.is24Hour {
    print("Current setting is 24h")
} else {
    print("Current setting is 12h")
}
let dateFormatter = DateFormatter()
dateFormatter.timeStyle = .short
print(dateFormatter.string(from: Date()))

This will print:

Current setting is 12h
10:09 PM

Upvotes: 3

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