This question already has an answer here:
1st april dates of 80s failed to parse in iOS 10.0
(1 answer)
Closed 5 years ago.
I'm using this code for converting array of String date into Date
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
for i in 0 ..< data.count {
let time = data[i]
let ft_date = time["ft_date"] as! String
print(ft_date)
let dateF = formatter.date(from: ft_date)
print(dateF)
}
and it's the output of console
2017-04-09T00:00:00
Optional(2017-04-08 19:30:00 +0000)
2017-04-08T00:00:00
Optional(2017-04-07 19:30:00 +0000)
2017-04-05T00:00:00
Optional(2017-04-04 19:30:00 +0000)
2017-04-01T00:00:00
Optional(2017-03-31 19:30:00 +0000)
2017-04-01T00:00:00
Optional(2017-03-31 19:30:00 +0000)
2017-04-01T00:00:00
Optional(2017-03-31 19:30:00 +0000)
2017-03-22T00:00:00
nil
why this is happening? it's the same format but I'm getting nil
Are you living in a country where daylight saving time changes on 2017-03-22 at midnight?
If yes this could be the reason because the date does not exist.
You need to change time Format ;
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss Z"
Related
This question already has answers here:
Difference between 'YYYY' and 'yyyy' in NSDateFormatter
(4 answers)
Closed 1 year ago.
Wrong value recived when decoding date in swift
let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = "LLL YYYY"
dateFormatterGet.timeZone = TimeZone(abbreviation: "UTC")
dateFormatterGet.locale = Locale(identifier: "en_US_POSIX")
if let date = dateFormatterGet.date(from: "Mar 2020") {
print(dateFormatterGet.string(from: date))// Prints Dec 2019
print(date)//2019-12-22 00:00:00 +0000
} else {
print("There was an error decoding the string")
}
it prints 2019-12-22 00:00:00 +0000
Should the dateFormat be dateFormatterGet.dateFormat = "LLL yyyy"?
This prints
Mar 2020
2020-03-01 00:00:00 +0000
in my console.
This question already has answers here:
NSDateFormatter still parsing instead having incorrect format
(3 answers)
Closed 3 years ago.
Why does dateFormatter return the correct date from an invalid format string?
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
let date = dateFormatter.date(from: "2020/////07////////10") //"Jul 10, 2020 at 12:00 AM"
I will say more - it also works unexpectedly
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
let dotDate = dateFormatter.date(from: "2020....07...10") // Optional(2020-07-09 21:00:00 +0000)
let commaDate = dateFormatter.date(from: "2020,,,,07,,,,10") // Optional(2020-07-09 21:00:00 +0000)
My version is probably the issue in internal implementation on Apple side and comparison with the ASCII code table, where the codes of these characters (,,-,.,/) are in order (from 44 to 47)
This is probably a part of their algorithm.
If you want the formatter to return nil in this case you can change the dateFormat to:
dateFormatter.dateFormat = "yyyy/MM/dd"
Results
let date = dateFormatter.date(from: "2020/////07////////10") // nil
let date2 = dateFormatter.date(from: "2020/07/10") // Jul 10, 2020 at 12:00 AM"
let date3 = dateFormatter.date(from: "2020.07.10") // Jul 10, 2020 at 12:00 AM"
I did run your code and it gives nil
Whereas if I enter correct date format then I receive the output
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
let date = dateFormatter.date(from: "2020-7-10")
print(date) // Optional(2020-07-10 00:00:00 +0000)
This question already has answers here:
NSDateFormatter doesn't show time zone abbreviation for "Asia/Kolkata" for the "z" or "zzz" specifier, just the GMT offset
(1 answer)
What is the best way to deal with the NSDateFormatter locale "feature"?
(4 answers)
Closed 5 years ago.
I need to convert the following date string in to a Date in Swift 3.
Fri Dec 09 16:18:43 AMST 2016
Here is the code that i have been using, but it's getting cash on this particular date string conversion. (This date was logged on Android using new Date().toString() method.)
static func formatDate(date: String) -> String {
let dateFormatter = DateFormatter()
dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
dateFormatter.dateFormat = "EEE MMM dd HH:mm:ss zzz yyyy"
//Works for "Fri Sep 16 10:55:48 GMT+05:30 2016"
var myDate = dateFormatter.date(from: date)
// My date returns nil on "Fri Dec 09 16:18:43 AMST 2016"
dateFormatter.dateFormat = "dd/MM/yyyy"
return "\(dateFormatter.string(from: myDate!))"
}
There are both type of strings in the database. I tried with various types of Timezone formats (z/zz/zzz/zzzz/zzzzz) but always myDate returns nil.
Any help would be appreciated.
Thanks In Advance.
Apple doc for TimeZone(abbreviation:):
In general, you are discouraged from using abbreviations except for unique instances such as “GMT”. Time Zone abbreviations are not standardized and so a given abbreviation may have multiple meanings.
Does AMST represents "Amazon Summer Time" (UTC-3) or "Armenia Summer Time" (UTC+5)? See: https://www.timeanddate.com/time/zones
That's probably why it can't detect the proper timezone to use.
Solutions I can propose:
If you know which timezone AMST is:
replace AMST by UTC-3 or UTC+5 in the date string
remove AMST from the date string and use dateFormatter.timeZone = TimeZone(secondsFromGMT: -3 or 5 * 3600)
Have your source output a more precise timezone.
Note the following code, where AMST is understood correctly:
let df = DateFormatter()
df.locale = Locale.init(identifier: "pt_BR") // assuming AMST is Amazon Summer Time (UTC -3)
df.dateFormat = "HH:mm:ss z"
print(df.date(from: "16:18:43 AMST")) // Optional(2000-01-01 19:18:43 +0000)
But as soon as you include English day or month names (e.g. Fri or Dec) it will produce nil (because they aren't in Portuguese).
This question already has answers here:
NSDate timeIntervalSince1970 not working in Swift? [duplicate]
(3 answers)
Closed 6 years ago.
I am trying to convert milliseconds to date string in swift 3,i tried by setting date fomatter but i am not getting current date string.
var milliseconds=1477593000000
let date = NSDate(timeIntervalSince1970: TimeInterval(milliseconds))
let formatter = DateFormatter()
formatter.dateFormat = "dd-MM-yyyy HH:mm:ss"
formatter.locale = NSLocale(localeIdentifier: "en_US") as Locale!
print(formatter.string(from: date as Date))
output:
22-01-48793 01:30:00
Try this,
var date = Date(timeIntervalSince1970: (1477593000000 / 1000.0))
print("date - \(date)")
You will get output as date :
date - 2016-10-27 18:30:00 +0000
How about trying this -
let milisecond = 1479714427
let dateVar = Date.init(timeIntervalSinceNow: TimeInterval(milisecond)/1000)
var dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd-MM-yyyy hh:mm"
print(dateFormatter.string(from: dateVar))
Have a look at the documentation of NSDate:
convenience init(timeIntervalSince1970 secs: TimeInterval)
Returns an NSDate object initialized relative to the current date and time by a given number of seconds.
Just convert your milliseconds to seconds and you should get the correct date.
This question already has answers here:
NSDateFormatter producing (null) SQLite and iOS 5.1
(2 answers)
Closed 6 years ago.
I have the code to convert a string to a date as:
let dateString = detailData.value["eventStart"] as! String
print(dateString)
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd hh:mm:ss Z" /*find out and place date format from http://userguide.icu-project.org/formatparse/datetime*/
let date = dateFormatter.dateFromString(dateString) // || date!.timeIntervalSince1970 >= presentDate.timeIntervalSince1970
print(date?.timeIntervalSince1970)
The output is:
2016-05-31 03:18:11 +0000
Optional(1464664691.0)
2016-06-03 14:00:44 +0000
nil
2016-06-01 00:38:08 +0000
Optional(1464741488.0)
2016-06-04 00:25:55 +0000
Optional(1464999955.0)
2016-05-31 22:19:54 +0000
nil
I see that the time in the afternoon (is 12+) return nil.
How can I prevent this?
Your date parsing is failing. In your case, its failing because of an invalid hour component in the input string.
Use 24-hour format HH instead of 12-hour format hh.