CODEWITHSUNDEEP
javascriptjsonswiftdatensdate
user1063192
user1063192

Reputation: 157

Swift - Converting JSON date to Swift compatible date

I am trying to convert a date in which the javascript code is generating the current date using the Date() function. But when I print it out, I am getting nil.

my code:

        let date2 = data?[0] as! String
        println(date2)

        var str = "2013-07-21T19:32:00Z"

        var dateFor: NSDateFormatter = NSDateFormatter()
        dateFor.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"

        var Date: NSDate? = dateFor.dateFromString(date2)

        println(Date)

date2 => is printing out 2015-05-15T21:58:00.066Z Date => is printing nil str is just for testing and works perfectly.

Anyone see any flaws in the code?

Upvotes: 3

Views: 6242

Answers (3)

craft
craft

Reputation: 2135

Use ISO8601DateFormatter per documentation going forward

In macOS 10.12 and later or iOS 10 and later, use the ISO8601DateFormatter class when working with ISO 8601 date representations.

import Foundation

let isoStr = "2020-02-18T11:40:01.000Z"

let isoDateFormatter = ISO8601DateFormatter()
isoDateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
isoDateFormatter.formatOptions = [
    .withFullDate,
    .withFullTime,
    .withDashSeparatorInDate,
    .withFractionalSeconds]

if let isoDateFormatted = isoDateFormatter.date(from: isoStr) {
    print(isoDateFormatted)
}

Upvotes: 1

Leo Dabus
Leo Dabus

Reputation: 236370

The issue is that str and date2 two are not the same date format. str format is "yyyy-MM-dd'T'HH:mm:ssZ" while date2 format is "yyyy-MM-dd'T'HH:mm:ss.SSSZ". Besides that you should always set your dateFormatter's locale to "en_US_POSIX" when parsing fixed-format dates:

let date2 = "2015-05-15T21:58:00.066Z"

let dateFormatter = DateFormatter()
dateFormatter.locale = .init(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
if let date = dateFormatter.date(from: date2) {
    print(date)  // "2015-05-15 21:58:00 +0000"
}

Upvotes: 19

Abhishek Jain
Abhishek Jain

Reputation: 4739

Swift 4+

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
let str = "2013-07-21T19:32:00Z"

if let date = dateFormatter.date(from: str) {
    print(date)
}

Output: 2013-07-21 19:32:00 +0000

Upvotes: 0

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