Nsdateformatter for Datetime

NSDateFormatter for datetime

try

 "yyyy-MM-dd'T'HH:mm:ss.SSSZZZZZ"

The Date Format Patterns guide suggests that "S" is the format specifier for fractions of seconds.

Date Format in Swift

You have to declare 2 different NSDateFormatters, the first to convert the string to a NSDate and the second to print the date in your format.

Try this code:

let dateFormatterGet = NSDateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd HH:mm:ss"

let dateFormatterPrint = NSDateFormatter()
dateFormatterPrint.dateFormat = "MMM dd,yyyy"

let date: NSDate? = dateFormatterGet.dateFromString("2016-02-29 12:24:26")
print(dateFormatterPrint.stringFromDate(date!))

Swift 3 and higher:

From Swift 3 NSDate class has been changed to Date and NSDateFormatter to DateFormatter.

let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd HH:mm:ss"

let dateFormatterPrint = DateFormatter()
dateFormatterPrint.dateFormat = "MMM dd,yyyy"

if let date = dateFormatterGet.date(from: "2016-02-29 12:24:26") {
    print(dateFormatterPrint.string(from: date))
} else {
   print("There was an error decoding the string")
}

How to convert datetime string into NSDate in iOS?

Try to set like this
NSDate *currDate = [NSDate date];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];

[dateFormatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];

NSString *dateString = [dateFormatter stringFromDate:currDate];

How to handle different date time formats using NSDateFormatter

A date formatter can only handle one format at a time. You need to take this approach:

NSDateFormatter *f = [[NSDateFormatter alloc] init];
[f setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *date = [f dateFromString:@"2010-01-10 13:55:15"];

NSDateFormatter *f2 = [[NSDateFormatter alloc] init];
[f2 setDateFormat:@"d. MMMM YYYY"];
NSString *s = [f2 stringFromDate:date];

s will now be "10. January 2010"

Set current time to yyyy-MM-dd 00:00:00 using Swift

let dateString = "2015-08-12 09:30:41 +0000"
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
dateFormatter.calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)
dateFormatter.timeZone = NSTimeZone(forSecondsFromGMT: 0)
dateFormatter.locale = NSLocale(localeIdentifier: "en_US_POSIX")
if let dateFromString = dateFormatter.dateFromString(dateString.componentsSeparatedByString(" ").first ?? "") {
    println(dateFromString)  // "2015-08-12 00:00:00 +0000"
}

Swift 4

let dateString = "2019-05-04 09:30:41 +0000"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
dateFormatter.calendar = Calendar(identifier: .gregorian)
dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
if let dateFromString = dateFormatter.date(from: dateString.components(separatedBy: " ").first ?? "") {
    print(dateFromString)  // "2019-05-04 00:00:00 +0000"
}

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