swift 5 - String to Date conversion results in nil

Question

Has something changed in Swift 5.x? Not sure what I'm doing wrong here.

    extension String {
      var dateValue: Date? {
        let dateAsString = "13:15"
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "HH:mm"
        let date = dateFormatter.date(from: dateAsString) //date is being nil here
        let Date24 = dateFormatter.string(from: date!)
        print("24 hour formatted Date:",Date24)
        return date
       }
    }

Is your phone set up in 12h format? Moght need en_us_posix before. — Larme, May 24 '20 at 18:49
your screenshot and given code aren't same. Which code you are using? — Ankur Lahiry, May 24 '20 at 18:52
Your code and your screenshot are not the same. The function`setLocalizedDateFormatFromTemplate` is for converting dates to strings not the other way around. — Fogmeister, May 24 '20 at 19:01
Updated the question with correct picture and details @Fogmeister and Ankur Lahiry — rak appdev, May 24 '20 at 19:53
@rakappdev you need to set your DateFormatter locale to "en_US_POSIX" before setting the other properties when parsing a fixed date format. You should set your date formatter calendar as well and if possible its defaultDate. — Leo Dabus, May 24 '20 at 21:11

score 6 · Answer 1 · answered May 24 '20 at 18:56

6

Change your code to :

let dateAsString = "13:15"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "HH:mm"
dateFormatter.timeZone = TimeZone(abbreviation: "GMT+00:00")//Add this
let date = dateFormatter.date(from: dateAsString)
print(date!)

My result is :

2000-01-01 13:15:00 +0000

Hope it helps...

answered May 24 '20 at 18:56

Picode

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I'm still seeing it as nil. Does any of this have to do with the fact that all of this is happening inside an extension? – rak appdev May 24 '20 at 20:20
My result is not nil. Are your sure your code same as mine? – Picode May 24 '20 at 20:46
Apparently this looks like a bug in Xcode/Swift 5.x as it's not showing nil if I try to print the date object. It is however showing nil when trying to debug by hovering over the variable as shown in the attached picture in Question. – rak appdev May 25 '20 at 04:30

swift 5 - String to Date conversion results in nil

1 Answers1