Found nil from dateFromString when converting string to date - ios

Here is my code:
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "dd MMM, yyyy"
let myDate = dateFormatter.dateFromString("2016-06-10")
print(myDate)
myDate is nil when I print.


If you want to convert this "2016-06-10" in to "dd MM, yyyy" then you need to write it like below code,
let dateString = "2016-06-10"
let formatter = NSDateFormatter()
formatter.dateFormat = "yyyy-MM-dd"
let date = formatter.dateFromString(dateString)
formatter.dateFormat = "dd MMM, yyyy"
let st = formatter.stringFromDate(date!)
print(st) //output : 10 Jun, 2016
Hope this helps you.

Related

Convert string to particular date format getting nil in iOS

I am getting date in string format from server. So I am trying to formatting to particular format.
But it is getting nil.
"07September16 4:09 am", This I want to format like Sep 07 2016
I am doing it with following code
dateLabel.text = model().formatStringToDate(dateString: date)
func formatStringToDate(dateString: String) -> String {
let dateStr = dateString
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM d yyyy"
let formattedDate = dateFormatter.date(from: dateStr)
print("formattedDate \(formattedDate)")
//I have to return formatted string here
}
Any suggestions?

That should work;
// create `Date` from date string
let dateStr = "07September16 4:09 am"
let dateFormatterGet = DateFormatter()
dateFormatterGet.locale = Locale(identifier: "en_US_POSIX")
dateFormatterGet.dateFormat = "ddMMMMyy h:mm a"
let date = dateFormatterGet.date(from: dateStr)
// convert back Date to string as Sep 07 2016
let dateFormatterPrint = DateFormatter()
dateFormatterPrint.dateFormat = "MMM dd yyyy"
print(dateFormatterPrint.string(from: date!))

let dateString = "07September16 4:09 am"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "ddMMMyy h:mm a"
let dateObj = dateFormatter.date(from: dateString)
dateFormatter.dateFormat = "MMM dd yyyy"
print("Dateobj: \(dateFormatter.string(from: dateObj!))")

First you must get date from your string with current format like`
let dateStr = dateString
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "ddMMMMyy h:mm a"
let formattedDate = dateFormatter.date(from: dateStr)!
print("formattedDate \(formattedDate)")
After getting the date you can get date string in which format you want just change the format`
dateFormatter.dateFormat = "MMM dd YYYY"
let convertedDateString = dateFormatter.string(from: formattedDate)

Date/Time formatting Swift

I'm trying to convert following date/time: "04-26-2018 10:17 AM" to this format: "2018-04-26T10:17"
here's my code:
let myDateString = "04-26-2018 10:17 AM"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy HH:mm a"
let myDate = dateFormatter.date(from: myDateString)!
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm"
let somedateString = dateFormatter.string(from: myDate)
The output for somedateString is "2018-04-26T00:17" which is incorrect.. is there something wrong in my code?

you just need correct DateFormatter this MM-dd-yyyy HH:mm a to MM-dd-yyyy hh:mm a
let myDateString = "04-26-2018 10:17 AM"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy hh:mm a"
let myDate = dateFormatter.date(from: myDateString)!
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm"
let somedateString = dateFormatter.string(from: myDate)

Use Date Formatter iOS10 Swift3

How to use Date Formatter in ios 10 swift 3?
i

You'll have to first convert the string to a date and then to a string in your required format. You can use DateFormatter to do this. Check the below code
let date = "07-11-2016 12:00:00"
let formatter = DateFormatter()
formatter.dateFormat = "dd-MM-yyyy HH:mm:ss"
let convertedDate = formatter.date(from: date)
formatter.dateFormat = "d MMMM yyyy h a"
let dateString = formatter.string(from: convertedDate!)
print(dateString) // Output will be 7 November 2016 12 PM

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd-MM-yyyy HH:mm:ss"
let date = dateFormatter.date(from: "07-11-2016 12:00:00")
dateFormatter.dateFormat = "dd MMMM yyyy HH a"
let dateString = dateFormatter.string(from: date)
dateString will be you desired output format of you date.
or you can simply create an extension of Date or string that return you the formatted date.

Sometimes NSTimeZone doesn't return proper UTC value?

I have encountered with below lines of code sometimes doesn't return proper UTC value:
let date = NSDate()
let formatter = NSDateFormatter()
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss ZZZ"
formatter.timeZone = NSTimeZone(abbreviation: "UTC")
Returns:
"2016-12-11 2:07:35 am +0000"
Instead of:
"2016-12-11 02:07:35 +0000"
What's wrong with that?

please use these code
let date = NSDate()
let formatter = NSDateFormatter()
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss ZZZ"
formatter.timeZone = NSTimeZone.localTimeZone()
formatter.locale = NSLocale.currentLocale()
print(formatter.stringFromDate(date))

converting String to Date swift3 ios10

why does this return a nil? detailDate is in this format:
"Wednesday, November 23, 2016 at 2:01 PM"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEEE, MMMM dd, yyyy' at 'h:mm a"
dateFormatter.dateStyle = .long
let dateForCalendar = dateFormatter.date(from: detailDate!)
I believe it returns a nil because my dateFormat is not the same as what my detailDate format is, but I don't understand why it's different.

After assigning a DateFormat why are you changing the date style ?
remove,
dateFormatter.dateStyle = .long
and it will work,
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEEE, MMMM dd, yyyy' at 'h:mm a"
let dateForCalendar = dateFormatter.date(from: detailDate!)

let detailDate = "Wednesday, November 23, 2016 at 2:01 PM"
let dateformatter = DateFormatter()
dateformatter.dateFormat = "EEEE, MMMM dd, yyyy' at 'h:mm a"
let strDate = dateformatter.date(from: detailDate)
print(strDate!)
try this , it's work proper

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