I am puzzled. I read the international spec for formats...yet it seems to return a nil in playgrounds and in code.
let dateString = "022018"
let formatter = NSDateFormatter()
formatter.setLocalizedDateFormatFromTemplate("MMyyyy")
let date = formatter.dateFromString(dateString)
I can't change the stringDate to be 02/2018...I have to maintain that format..what is the right mask then to get some output?
The problem is the call to formatter.setLocalizedDateFormatFromTemplate. I don't think this means what you think it does. You are turning a string to a date, not a date to a string. Just set the formatter's dateFormat. This works fine (Swift 3, hope you don't mind):
let dateString = "022018"
let formatter = DateFormatter()
formatter.dateFormat = "MMyyyy"
let date = formatter.date(from:dateString)
Related
I am trying to display a date interval formatted using a custom format. The format which I am using works well for a date but do not so good when used with a date interval.
I pus as comments what is displayed and what I expect. Is there truly a problem or my expectations are wrong, in case they are wrong, why so? also, how can I achieve the expected part?
import UIKit
let now = Date()
let tomorrow = now.addingTimeInterval(24.0 * 3600.0)
let dateInterval = DateInterval(start: now, end: tomorrow)
// Initialize Date Interval Formatter
let dateIntervalFormatter = DateIntervalFormatter()
dateIntervalFormatter.dateTemplate = "dd-MM-yyyy"
dateIntervalFormatter.locale = Locale(identifier: "de")
dateIntervalFormatter.string(from: dateInterval)
// displays "12.–13.01.2022"
// expected "12-–13-01-2022"
dateIntervalFormatter.locale = Locale(identifier: "en")
dateIntervalFormatter.string(from: dateInterval)
// displays "1/12/2022 – 1/13/2022"
// expected "12-01-2022 – 13-01-2022"
dateIntervalFormatter.locale = Locale(identifier: "ro")
dateIntervalFormatter.string(from: dateInterval)
// displays "12.01.2022 – 13.01.2022"
// expected "12-01-2022 – 13-01-2022"
let formatter = DateFormatter()
formatter.dateFormat = "dd-MM-yyyy"
formatter.locale = Locale(identifier: "de")
let formatedTime = formatter.string(from: Date())
// displays "12-01-2022"
// expected "12-01-2022"
A locale/template based format means "I yield the details to you", so the DateIntervalFormatter does what it pleases depending on the locale. The DateFormatter example, on the other hand, is not locale/template based, so you get what you specified in the format (not template) you supplied.
I'm trying to format this date: 2018-01-10T11:57:21.153 to Swift Date object like this:
let dateSentString = jsonDict["date"] as! String
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
let date = dateFormatter.date(from: dateSentString)!
For some reason, the app crashes on the last line.
What am I doing wrong? Thanks!
change the milli seconds format use 'SSS' specifier (with number of S's equal to number of digits of milliseconds ). for more information you get here
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS"
from
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
Full code
let dateSentString = "2018-01-10T11:57:21.153"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS"
let date = dateFormatter.date(from: dateSentString)!
print(date)
You have to first set formatter for date you are getting from JSON and then another formatter for the date you want.
First convert string fro JSON to a date variable by setting same format coming in JSON object .
Then you have to re-format that date variable into format you want.
I can write code if you want but it is better to try yourself.
Happy Coding
I'm getting following two types of strings from server:
2016-07-28T12:25:31.922247
2016-07-28T13:39:13
I want to convert them into NSDate. I'm using following snippet to convert but it's failing:
let dateFormatter = NSDateFormatter()
dateFormatter.timeZone = NSTimeZone(name: "UTC")
dateFormatter.dateFormat = "yyyy-MM-ddTHH:mm:ss"
I'm not getting the desired output.
If you doesn't care the fraction of second then you can remove it like this.
var strDate = "2016-07-28T12:25:31.922247"
if strDate.rangeOfString(".") != nil{
let arr = strDate.characters.split{$0 == " "}.map(String.init)
strDate = arr[0]
}
//Now you can convert this string to date using same date format
let formatter= NSDateFormatter()
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
let date = formatter.dateFromString(strDate)
You can get the exact format from this Link
For the second string use this
yyyy-MM-dd'T'HH:mm:ss
You need to quote the "T" (or any alpha characters that should be present in literal form), try:
let dateFormatter = NSDateFormatter()
dateFormatter.timeZone = NSTimeZone(name: "UTC")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
Note that this will only parse your second string. To parse your first string you'll need to use:
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.S"
if you care about the fractional seconds. Since NSDateFormatter is a literal parser it doesn't allow you to easily parse either format, if you have to parse both you'll just need to pass it to one, if that fails pass to the other.
Your date format works in 2016-07-28T13:39:13 but add 'T'
Example: yyyy-MM-dd'T'HH:mm:ss.
But for the 2016-07-28T12:25:31.922247 you need clarifies that this means 922247
the truth had never seen anything like it, but I would try with yyyy-MM-ddTHH:mm:ssZ
I really need your help guys. The following piece of code works fine in a Swift Playgound and with any iOS8 or 8.1 simulator. But with iOS7 and 7.1, the NSDate object is always set to nil.
The object dateString contains a JSON string (ISO 8601 format) like 2015-02-28T20:15:00+0100
I'm trying to convert this date string into a NSDate object with the following code :
let dateFormatter = NSDateFormatter()
dateFormatter.locale = NSLocale(localeIdentifier: "en_US_POSIX")
dateFormatter.timeZone = NSTimeZone.localTimeZone()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.ZZZ"
if let dateString = (json as NSDictionary).valueForKey("dateAndTime") as? String
{
let dateObject = dateFormatter.dateFromString(dateString)
}
Where's my mistake ? I'm getting confused!
Many thanks
The problem is with your time zone offset, your date format is not proper for that. Use the following format,
"yyyy-MM-dd'T'HH:mm:ssZZZZZ"
I'm working with some JSON data that returns a dateTime in this format: "2015-01-17T20:00Z", when I attempt to turn this into an NSDate object, I'm always left with nil. I've read through several of the tutorials and answers here on SO, Apple's NSDate / NSDateFormatter / Date Formatting docs, and pinged a few IRC channels.
Can anyone tell me what I'm doing wrong and a possible work around?
My failing code in a Swift playground:
let dateString = "2015-01-17T20:00Z"
let dateStringFormatter = NSDateFormatter()
dateStringFormatter.dateFormat = "yyyy-MM-ddThh:mmZ"
let d = dateStringFormatter.dateFromString(dateString)
println(d)
Output: "Optional(2015-01-17 06:00:00 +0000)"
Working code in the same Swift playground:
let dateString = "2015-01-17"
let dateStringFormatter = NSDateFormatter()
dateStringFormatter.dateFormat = "yyyy-MM-dd"
let d = dateStringFormatter.dateFromString(dateString)
println(d)
Output: "nil"
You have to format it like this "yyyy-MM-dd\'T\'HH:mmZ". You can try it also with this extension:
extension String {
func toDateFormattedWith(format:String)-> NSDate {
let formatter = NSDateFormatter()
formatter.dateFormat = format
return formatter.dateFromString(self)!
}
}
as mentioned by rmaddy your date is UTC format so we will escape only the "T" as follow:
"2015-01-17T20:00Z".toDateFormattedWith("yyyy-MM-dd\'T\'HH:mmZ") // "Jan 17, 2015, 6:00 PM"
If you need some reference formatting your dates you can use this one;