Wrong date in swift 5 after conversion [duplicate] - ios

Question

This question already has answers here:
How can I parse / create a date time stamp formatted with fractional seconds UTC timezone (ISO 8601, RFC 3339) in Swift?
(13 answers)
Closed 3 years ago.
I am converting current date into GMT/UTC date string. But every time it returns me with wrong date.
My todays date is 07 February 2020, 11:09:20 AM. You can refer below image.
Here is my code :
let apiFormatter = DateFormatter()
//apiFormatter.dateStyle = DateFormatter.Style.long
//apiFormatter.timeStyle = DateFormatter.Style.long
//apiFormatter.calendar = Calendar.current
apiFormatter.timeZone = TimeZone.init(identifier: "GMT") //TimeZone(abbreviation: "UTC") //TimeZone.current //
//apiFormatter.locale = Locale.current
//apiFormatter.dateFormat = "yyyy-MM-DD HH:mm:ss"
apiFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
//apiFormatter.dateFormat = "yyyy-MM-dd'T'hh:mm:ssZ"
let endDate = apiFormatter.string(from: Date())
print(endDate)
And what I am getting in return is also you can check in image - 2020-02-38T05:33:34.598Z. I have tried with all the format, but no any luck. Can anyone suggest where it is going wrong?

Answer 1

First of all, the format should be:
apiFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
The Z is not a literal letter, it's the description of the time zone. However, making it a literal won't probably make a problem.
The 38 for day from your output is obviously caused by the DD format you have commented out.
Nevertheless, you have to set the locale:
apiFormatter.locale = Locale(identifier: "en_US_POSIX")
Otherwise you will have problems with 12/24h switching.
let apiFormatter = DateFormatter()
apiFormatter.locale = Locale(identifier: "en_US_POSIX")
// remove this if you want to keep your current timezone (shouldn't really matter, the time is the same)
apiFormatter.timeZone = TimeZone(secondsFromGMT: 0)
apiFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
let endDate = apiFormatter.string(from: Date())
print(endDate) // 2020-02-07T08:25:23.470+0000
print(Date()) // 2020-02-07 08:25:23 +0000
Also note that you can use ISO8601DateFormatter instead of DateFormatter.

Answer 2

Try this and adjust according to what format you are getting from server -
private func getFormatedDateInString(_ dateString: String) -> String? {
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
dateFormatter.timeZone = TimeZone(identifier: "UTC")
if let date = dateFormatter.date(from: dateString) {
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
dateFormatter.timeZone = TimeZone.current
let timeStamp = dateFormatter.string(from: date)
return timeStamp
}
return nil
}