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

Question

I want to ask about NSDate, how to set/format current time like \"2015-08-12 09:30:41 +0000\" to \"2015-08-12 00:00:00 +0000

I\'m already using :

Answer 1

If you only care about the timezone on user's device, i.e, you are not going to save that formatted date string to server, etc, then, you can use the following code:

var formatter: NSDateFormatter = NSDateFormatter()
formatter.dateFormat="yyyy-MM-dd 00:00:00 Z"
formatter.stringFromDate(date)

If you want to save that date string to server as well, then, you should add timezone info to the formatter:

var formatter: NSDateFormatter = NSDateFormatter()
formatter.timeZone = NSTimeZone(forSecondsFromGMT: 0)
formatter.dateFormat="yyyy-MM-dd 00:00:00 Z"
formatter.stringFromDate(date)

Update

Now I understand what you actually wanted to do, you have a date string instead of a NSDate object as an input.

You can use the following code for achieving your desired output, with respect to preserving timezone info of the input.

let dateString = "2015-08-12 09:30:41 +0000"
let calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)
let timeZone = NSTimeZone(forSecondsFromGMT: 0)

let inputDateFormatter = NSDateFormatter()
inputDateFormatter.dateFormat = "yyyy-MM-dd hh:mm:ss Z"
inputDateFormatter.calendar = calendar

if let inputDate = inputDateFormatter.dateFromString(dateString) {
    let outPutDateFormatter = NSDateFormatter()
    outPutDateFormatter.calendar = calendar
    outPutDateFormatter.timeZone = timeZone
    outPutDateFormatter.dateFormat = "yyyy-MM-dd 00:00:00 Z"
    print(outPutDateFormatter.stringFromDate(inputDate))
}