Question 69068 in IOS Swift Question posted in
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Convert string containing date to Date – Ios swift

I’m having issues converting a string to date on swift, maybe it is something obvious but I don’t get it.

I’m trying to convert "Jan 18, 2022 04:39PM GMT" this string into a Date. My code looks like this:

let str = "Jan 18, 2022 04:39PM GMT"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM d, YYYY hh:mma z"

let date = dateFormatter.date(from: str)
print(date)

And console shows: Optional(2021-12-19 16:39:00 +0000)

Any idea what’s wrong in this formatter?

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2

Answers


  1. 0

    In addition to the Date being shown as an Optional, your format string appears to be wrong. "YYYY" should be "yyyy", so the whole line that assigns the formatter should be:

    dateFormatter.dateFormat = "MMM d, yyyy hh:mma z"

    That change yields the output

    "Optional(2022-01-18 16:39:00 +0000)"

    In addition, you should really force the calendar to Gregorian or iso8601, and set its locale to "en_US_POSIX:

    An improved version of the date formatter could would look like this:

    (from Leo’s edit.)

    let str = "Jan 18, 2022 04:39PM GMT"
let dateFormatter = DateFormatter()
dateFormatter.calendar = .init(identifier: .iso8601)
dateFormatter.locale = .init(identifier: "en_US_POSIX")
dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
dateFormatter.dateFormat = "MMM d, yyyy hh:mma z"

if let date = dateFormatter.date(from: str) {
    let dateString = dateFormatter.string(from: date)
    print(dateString == str)  // true
}
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  2. 0

    The code written for converting date is correct, also converted date is correct. But final result is optional so you are getting date like Optional(2021-12-19 16:39:00 +0000).
    Also the date formatter is wrong.
    So please unwrap the date to get actual date without optional.

    dateFormatter.dateFormat = "MMM d, yyyy hh:mma z"
guard let convertedDate = date else {
return
}
print(convertedDate)
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