I have this code working but now all of a sudden, it started crashing. I could not figure it out, any help would be appreciated.
let dateFormatter = NSDateFormatter()
dateFormat = "EEE, MMM d, yyyy hh:mm a"
dateFormatter.dateFormat = dateFormat
let date = dateFormatter.dateFromString("Thu, Jan 5, 2017 12:28 PM")
It is returning date as nil. Why? I want it to return proper date.
This looks like a possible duplicate question, but it is with specific details.
let dateformattor = NSDateFormatter()
dateformattor.dateFormat = "EEE, MMM d, yyyy hh:mm a"
dateformattor.timeZone = NSTimeZone.localTimeZone()
let dt = "Thu, Jan 5, 2017 12:28 PM"
let dt1 = dateformattor.dateFromString(dt as String)
print(dt1) //print date and time UTC format.
Output :
2017-01-05 06:58:00 +0000
var dateFormatter = DateFormatter()
let dateFormat = "EEE, MMM d, yyyy hh:mm a"
dateFormatter.dateFormat = dateFormat
let date = dateFormatter.date(from: "Thu, Jan 5, 2017 12:28 PM")
OUTPUT :
Every time you work with time and date formatters remember to set locale and timezone!
Device with non-english locale will fail to parse "Thu, Jan 5, 2017 12:28 PM" as "Thu" and "Jan" are obviously english specific.
So:
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
or whatever time zone and locale you want to use
Related
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?
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
}
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)
I have a function to convert string to date format. This function works as expected on iOS 12 but on iOS 13. I get this error:
"Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value"
Here is my code:
func ConvertDateAndTimeFormat2() {
let timeDate = "2019-09-24 15:00:00 +0000"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss +zzzz"
dateFormatter.timeZone = TimeZone(abbreviation: "GMT+3:00")
var dateObj:Date!
dateObj = dateFormatter.date(from: timeDate)
dateFormatter.dateFormat = "EEEE, MMM d, yyyy"
dateFormatter.timeZone = TimeZone(abbreviation: "GMT+3:00")
let timeFormatter = DateFormatter()
timeFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss +zzzz"
timeFormatter.timeZone = TimeZone(abbreviation: "GMT+3:00")
var timeObj:Date!
timeObj = timeFormatter.date(from: timeDate)
timeFormatter.dateFormat = "HH:mm"
timeFormatter.timeZone = TimeZone(abbreviation: "GMT+3:00")
let timef = "\(timeFormatter.string(from: timeObj!))"
let Date = "\(dateFormatter.string(from: dateObj!))"
}
Please change your dateformat and use "yyyy-MM-dd HH:mm:ss Z" and try.
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss Z"
For more details please visit https://nsdateformatter.com/
If you are trying to convert string time which in 24 hours format (Ex 15:25:00 / HH:mm:ss) then enable your device 24-Hour Time option. It might solve the issue in IOS 13.3
You may find the option here
Settings -> General -> Date & Time
There are many issues with your code. There is no reason to create two Date objects from one string. Just parse the original string once. Then you can create your date string and time string with the desired formats from that one date.
You should also use the special locale of en_US_POSIX when parsing fixed format date strings. There is also no need to set a timezone when parsing the original date string. The string provides its own timezone. The +0000 means it is UTC time.
You may not want to provide a timezone when converting the date to your final strings either. Most likely you want strings in the user's locale timezone, not some hardcoded timezone.
Here's your code cleaned up a lot:
func convertDateAndTimeFormat2() {
let timeDate = "2019-09-24 15:00:00 +0000"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss Z"
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
if let dateObj = dateFormatter.date(from: timeDate) {
dateFormatter.dateFormat = "EEEE, MMM d, yyyy"
dateFormatter.timeZone = TimeZone(abbreviation: "GMT+3:00") // Probably not needed
let timeFormatter = DateFormatter()
timeFormatter.dateFormat = "HH:mm"
timeFormatter.timeZone = TimeZone(abbreviation: "GMT+3:00") // Probably not needed
let timef = timeFormatter.string(from: dateObj)
let datef = dateFormatter.string(from: dateObj)
print("Date: \(datef), time: \(timef)")
}
}
convertDateAndTimeFormat2()
Output:
Date: Tuesday, Sep 24, 2019, time: 18:00
Getting date from DateFormatter without delimiter returns the wrong date,
As per our requirement, we cannot use / or - in our date formatter string.
let dateFormatter = DateFormatter()
dateFormatter.timeZone = TimeZone.current
dateFormatter.timeZone = TimeZone(identifier: "UTC")
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.calendar = Calendar(identifier: .iso8601)
dateFormatter.dateFormat = "ddMMyyyy"
dateFormatter.date(from: "1112987")
this returns "Nov 1, 2987 at 8:00 AM", however it should be "Dec 11 0987"
Another Example:
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMddyyyy"
dateFormatter.date(from: "1131987") // "Jan 13, 1987 at 12:00 AM"
This should return nil as November 31st is a invalid date
Please suggest any solution
You have to update your date format from ddMMyyyy to MMddyyyy.
Your code :-
dateFormatter.dateFormat = "ddMMyyyy"
New code :-
dateFormatter.dateFormat = "MMddyyyy"
Also, you have to set 4 digit year instead of 3 digit.
Your code :-
dateFormatter.date(from: "1112987")
New code :-
dateFormatter.date(from: "11120987"
If you get any issue post your reply.
I have a issue with getting the correct date in the following case
let dateString = "May 2, 2018 at 3:31 PM"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM dd, yyyy 'at' HH:mm a"
dateFormatter.timeZone = TimeZone(identifier: "UTC")
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
let date = dateFormatter.date(from: dateString)!
I am getting "May 2, 2018 at 8:31 AM" as the date, which is wrong
When the same date is used with a different dateformatting string i get the correct date
let dateFormatter3 = DateFormatter()
dateFormatter3.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
dateFormatter3.locale = Locale(identifier: "en_US_POSIX")
dateFormatter3.timeZone = TimeZone(identifier: "UTC")
let date3 = dateFormatter3.date(from: "2018-05-02T15:31:00")!
Date returned is "May 2, 2018 at 11:31 AM" which is correct.
I like to know what i am doing wrong in the first code block? Or is this a bug in the date formatter class ?
when hour is in am/pm(1~12) use hh, to hour in day(0~23) use HH.
This helps me format my dates:
I hope this would work for you:
let dateString = "May 2, 2018 at 3:31 PM"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM dd, yyyy 'at' hh:mm a"
dateFormatter.timeZone = TimeZone(identifier: "UTC")
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
let date = dateFormatter.date(from: dateString)
print(date!)
Output:-
I've a specific time format which I want to use to generate a Date object.
This is the format:
Fri, 17 Mar 2017 08:42:00 +0100
Here is my Swift code that should create the data object:
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEE, dd MMM yyyy HH:mm:ss xx"
let d = dateFormatter.date(from: value)
The generation of the Date object with dateFormatter.date does always return nil. But I cant see what's wrong in my formatting string.
Can anyone see my error?
I have test it and works perfectly.
Could you test this code line to identify you Locale configuration?
print(Locale.current.identifier)
I only made a little change related to the Optional result that DateFormatter method returns
import Foundation
let the_date: String = "Fri, 17 Mar 2017 08:42:00 +0100"
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale.current
dateFormatter.dateFormat = "EEE, dd MMM yyyy HH:mm:ss xx"
if let d = dateFormatter.date(from: the_date)
{
print(d)
}