My string is = "2015-08-26 14:21:40.557"
My code:
var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd hh:mm:Z"
var date = dateFormatter.dateFromString(creationDateStr as String )
I get a nil date , what's the right format?
The format must match your input string exactly, so
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
will do the job.
Note that Z is used for the timezone, not for (milli)seconds.
And HH is for 24 hours; hh only allows values between 01 and 12 and is usually paired with a to indicate AM/PM.
var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
var date = dateFormatter.dateFromString(creationDateStr as String )
Will return nil if your string is not in this date format. (ex. "5/26/2015" will return nil but "2015-05-26 12:30:00.123" will return a nsdate)
The format is incorrect for the string you are attempting to parse.
The correct format is:
"yyyy-MM-dd HH:mm:ss.SSS"
Parsing an incorrect format will return a nil value.
var str = "2015-08-26 14:21:40.557"
var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
var date = dateFormatter.dateFromString(str)
Related
I've this string: "2016-10-08 00:20:00.000000". And I need it as an NSDate (Date for swift 3) object.
I've tried with the following:
let formatterJsonDate = DateFormatter()
formatterJsonDate.dateFormat = "yyy-MM-dd hh:mm:ss"
print(formatterJsonDate.date(from: "2016-10-08 00:20:00.000000"))
I always return nil value. What's wrong? I guess it's something about the date format.
Your date format and your time string should be same. In your case it should be like,
let formatterJsonDate = DateFormatter()
formatterJsonDate.dateFormat = "yyy-MM-dd HH:mm:ss"
print(formatterJsonDate.date(from: "2016-10-08 00:20:00"))
Or change dateformatter like,
"yyyy-MM-dd HH:mm:ss.SSSSSS"
And hh should be capital for 24 - hour format!!!! like HH!
If you want use nano seconds your code must be :
let formatterJsonDate = DateFormatter()
formatterJsonDate.dateFormat = "yyy-MM-dd hh:mm:ss.SSSS"
if let myDate = formatterJsonDate.date(from: "2016-10-08 00:20:00.000000") {
print(myDate)
} else {
print ("Invalid Date")
}
I receive dates as String like this one:
"2016-05-20T12:25:00.0"
I want to get its corresponding NSDate object, and I'm trying this way:
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "YYYY-MM-DDThh:mm:ss.s"
let date = dateFormatter.dateFromString(dateStr)
where dateStr is like the example I wrote first. I took the dateFormat string from this page, but I get a nil date, what is wrong there?
Thanks in advance
You have a few problems with your date format. First Y is for weekOfYear, D is for day of year. hh is used for 12 hours format, decimal second you should use capital S and you need to escape the 'T'
You should do as follow:
let dateString = "2016-05-20T12:25:00.0"
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.S"
if let date = dateFormatter.dateFromString(dateString) {
print(dateFormatter.stringFromDate(date) ) // "2016-05-20T12:25:00.0\n"
}
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.S"
if let date = dateFormatter.stringFromDate(NSDate()) {
print(dateFormatter.stringFromDate(date) )
}
I have this code in Playground, and date is always nil.
let str = "2015-12-07T22:26:37.624Z"
let formatter = NSDateFormatter()
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSS"
let date = formatter.dateFromString(str)
The date string is retrieved from my server, which is always in GMT+0.
Add the trailing Z of the date string
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSSZ"
//The Z at the end of your string represents Zulu which is UTC
My code:
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let date = dateFormatter.dateFromString("2015-09-01 00-32-40")
Result: 2015-08-31 17:32:40
But I want get result like this: 17:32. How do I resolve it?
If you're trying to get an NSDate and not a string representation, printing the NSDate will always show the full date time. To just show the hours and minutes, you'll have to create a string representation using an "HH:mm" date format, ex:
// Your original code
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let date = dateFormatter.dateFromString("2015-09-01 00-32-40")
// To convert the date into an HH:mm format
dateFormatter.dateFormat = "HH:mm"
let dateString = dateFormatter.stringFromDate(date!)
println(dateString)
Not sure why you're looking to get a result of "17:32", but this will produce "00:32" as a result from the original "00-32" portion of the string.
I need to construct NSDate object from String, so I wrote the following code:
func getNSDateObjectFromString(string: String) -> NSDate {
var formatter = NSDateFormatter()
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
let date = formatter.dateFromString(string)
return date!
}
Unfortunately, the input string sometimes may contain milliseconds too. What can I do in this case? I don't find any way to read milliseconds (not in the day) according to the http://www.unicode.org/reports/tr35/tr35-31/tr35-dates.html#Date_Format_Patterns
Thanks in advance.
As far as I know, the format doesn't support "optional" fields. So you have to try the formats one by one:
func getNSDateObjectFromString(string: String) -> NSDate {
var formatter = NSDateFormatter()
formatter.locale = NSLocale(localeIdentifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
var date = formatter.dateFromString(string)
if date == nil {
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.S"
date = formatter.dateFromString(string)
}
return date!
}
You can try something like:
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS"
A Swift 3 Solution
After a bit of trial and error with the date format this is what worked for me with Swift 3.
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
let date = formatter.date(from: "2017-03-11 13:16:31.177")!
debugPrint(dateFormatter.string(from: date))
and after a round trip results in the expected debug output of
"2017-03-11 13:16:31.177"
Note that using the format "yyyy-MM-dd'T'HH:mm:ss.SSS" resulted in formatter.date(from: returning a nil optional Date.
Are they important?
In DateFormatter you create your matching string in years, months, days, hours, mins, secs, but you don't need to. If your matching string does not contain any of them, formatter will just ignore them.