CODEWITHSUNDEEP
swiftstringdatensdateformatter
Nuzhdin Vladimir
Nuzhdin Vladimir

Reputation: 1822

Got nil after string to date convertation

I need to convert String simular to "2016-07-10T21:32:20G" to Date. But for some reason I've got only nil again and again.

I've read an article about date formater. And unfortunately haven't fount an answer there. I found something in the documentation. And documentation tels to read about Unicode Date Format Patterns. And it looks similar to mine.

enter image description here

Probably I missed something =(

My Code example. Unfortunately always get nil.

let lastUpdatedDateString = "2016-07-10 21:32:20"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-mm-dd hh:mm:ss"
let lastUpdated = dateFormatter.date(from:lastUpdatedDateString)

But this code works fine:

let lastUpdatedDateString = "2016-07-10"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-mm-dd"
let lastUpdated = dateFormatter.date(from:lastUpdatedDateString)

I'm testing it in the playground.

enter image description here

In fact I must convert this String("2016-07-10T21:32:20G") to Date.

PS

Anyway, thanks for attention =)

Upvotes: 0

Views: 88

Answers (2)

Jeremy
Jeremy

Reputation: 1521

This is what I get with the playground

let lastUpdatedDateString = "2016-07-10T21:32:20"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-ddEEEEEHH:mm:ss"
let lastUpdated = dateFormatter.date(from:lastUpdatedDateString)
print(lastUpdated)

and it prints: Optional(2016-07-10 19:32:20 +0000) (I'm GMT+2)

I don't know what the G stands for so I'm not sure how I can get the last character for the pattern. EEEEE stands for day of the week (1 character)

EDIT: It seems G stand for gregorian calendar

so you can parse the last letter out of the string and add this if it's gregorian calendar (but I suppose this is the default value):

dateFormatter.calendar = Calendar(identifier: .gregorian)

If the letter's a J it's Julian calendar then and you can see this answer to see how to convert gregorian to julian: https://stackoverflow.com/a/12137019/2106940

Upvotes: 1

Nagra
Nagra

Reputation: 1549

Think it's just the capitalisation in your formatter. Try this ...

let lastUpdatedDateString = "2016-07-10 21:32:20"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let lastUpdated = dateFormatter.date(from:lastUpdatedDateString)

Upvotes: 2

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