I need to date and time with my own format like time in AM/PM (12 hours).
extension Date {
func getStringFromDateWithUTCFormat() -> ObjTimeStamp {
let dateFormatterPrint = DateFormatter()
dateFormatterPrint.timeZone = TimeZone.init(abbreviation: "UTC")
// Get Date
dateFormatterPrint.dateFormat = "MM/dd/yyyy" //"MMM dd,yyyy"
let date = dateFormatterPrint.string(from: self)
// Get Time
dateFormatterPrint.dateFormat = "hh:mm:ss a"
let time = dateFormatterPrint.string(from: self)
return ObjTimeStamp.init(date: date, time: time, timeStamp: self)
}
}
Update
Calling function
self.currentDate = Date()
let objTimeStamp = currentDate.getStringFromDateWithUTCFormat()
Perfect work when device time in 12-hour format when I try to change device time in 24-hour formate then given wrong time format.
set your dateFormatter locale to en-US then try to convert, it's works for me when iPhone's time format is 24 hour:
let date = Date()
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en-US")
formatter.dateFormat = "hh:mm a"
let time12 = formatter.string(from: date)
print(time12)
output:
01:37 PM
Related
I get a crash when running and it points at the dateFormmater.timezone.
The error in the console is:
Could not cast value of type 'Swift.Optional' (0x1192bf4a8) to 'NSTimeZone' (0x1192c0270).
the value of rowEvents.date is "1480134638.0"
Im trying to pull out a Unix timestamp from Firebase saved as a string. Convert it to Date and again save it as a string so I can post it on a cell label.
I got this code from StackOverflow. I plugged in my data and everything is all good until I run it. I guess everything is not all good...
if let lastUpdated : String = rowEvents.date {
let epocTime = TimeInterval(lastUpdated)! / 1000 // convert it from milliseconds dividing it by 1000
let unixTimestamp = NSDate(timeIntervalSince1970: epocTime) //convert unix timestamp to Date
let dateFormatter = DateFormatter()
dateFormatter.timeZone = NSTimeZone() as TimeZone!
dateFormatter.locale = NSLocale.current // NSLocale(localeIdentifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZZ"
dateFormatter.date(from: String(describing: unixTimestamp))
let updatedTimeStamp = unixTimestamp
let cellDate = DateFormatter.localizedString(from: updatedTimeStamp as Date, dateStyle: DateFormatter.Style.full, timeStyle: DateFormatter.Style.medium)
cell.subtitleLabel.text = cellDate
}
The result came from this code here:
let myTimeStamp = self.datePicker?.date.timeIntervalSince1970
let calendarDate = String(describing: myTimeStamp! /** 1000*/)
You can convert unixTimestamp to date using Date(timeIntervalSince1970:).
let unixTimestamp = 1480134638.0
let date = Date(timeIntervalSince1970: unixTimestamp)
If you want to display date in string with specific formate than you can use DateFormatter like this way.
let date = Date(timeIntervalSince1970: unixtimeInterval)
let dateFormatter = DateFormatter()
dateFormatter.timeZone = TimeZone(abbreviation: "GMT") //Set timezone that you want
dateFormatter.locale = NSLocale.current
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm" //Specify your format that you want
let strDate = dateFormatter.string(from: date)
The problem is the line dateFormatter.timeZone = NSTimeZone() as TimeZone!.
Simply use TimeZone instead of NSTimeZone like
dateFormatter.timeZone = TimeZone.current and your code will work.
You might also remove your / 1000 because 1480134638.0 looks more like seconds than milliseconds (since 1970).
Swift 4.1. I created a function. Just pass you timeStamp in function param and function will return data in string data type. You can add more properties to DateFormatter object.
func getDateFromTimeStamp(timeStamp : Double) -> String {
let date = NSDate(timeIntervalSince1970: timeStamp / 1000)
let dayTimePeriodFormatter = DateFormatter()
dayTimePeriodFormatter.dateFormat = "dd MMM YY, hh:mm a"
// UnComment below to get only time
// dayTimePeriodFormatter.dateFormat = "hh:mm a"
let dateString = dayTimePeriodFormatter.string(from: date as Date)
return dateString
}
Using playground all I did was this.
let epochTime = 1547855446
let newTime = Date(timeIntervalSince1970: TimeInterval(epochTime))
print(newTime)
Returns this - 2019-01-18 23:50:46 +0000
extension Double{
func convertDate(formate: String) -> String {
let date = (timeIntervalSince1970: self)
let dateFormatter = DateFormatter()
dateFormatter.timeZone = TimeZone.current
dateFormatter.locale = NSLocale(localeIdentifier: "(your localization language)" ) as Locale //localization language
dateFormatter.dateFormat = formate //Specify your format that you want let
strDate = dateFormatter.string(from: date)
return strDate
}
}
//usage
let timeStamp:Double = Double(1595407043)
print(timeStamp.convertDate(formate: "EEEE dd/MM/YYY"))
This solution is valid for swift 3 -> 4.2 :
you can add an extension on the Double that returns the date formatted:
extension Double {
// returns the date formatted.
var dateFormatted : String? {
let date = Date(timeIntervalSince1970: self)
let dateFormatter = DateFormatter()
dateFormatter.timeStyle = DateFormatter.Style.none //Set time style
dateFormatter.dateStyle = DateFormatter.Style.short //Set date style
return dateFormatter.string(from: date)
}
// returns the date formatted according to the format string provided.
func dateFormatted(withFormat format : String) -> String{
let date = Date(timeIntervalSince1970: self)
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = format
return dateFormatter.string(from: date)
}
}
example on the above :
let timeStamp = 82749029.0
print(timeStamp. dateFormatted)
//output
//12/11/1994
let timeStamp = 82749029.0
print(timeStamp. dateFormatted(withFormat : "MM-dd-yyyy HH:mm"))
//output
//12-11-1994 13:04
I have a string that looks like this:
"date": "2022-06-30T02:15:00.000+07:00"
And I formatted it to convert to "HH:mm" like this:
func formatTime(string: String) -> String {
let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZZZZZ"
let dateFormatterPrint = DateFormatter()
dateFormatterPrint.dateFormat = "HH:mm"
let date: Date? = dateFormatterGet.date(from: string)
return dateFormatterPrint.string(from: date ?? Date())
}
The result I want it returns is 09:15, but it returns 02:15.
Can someone tell me where I went wrong? Thank you
"2022-06-30T02:15:00.000+07:00" is the date in the time zone plus 7 hours from the UTC time zone. Than this date in UTC is “ 2022-06-29T19:15:00Z”
while dateFormatterPrint has a default locale configuration according to the phone settings
You need to set UTC timezone
In this case you might want to convert the DateTime to your local time first:
Convert To LocalTime:
func utcToLocal(dateStr: String) -> String? {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "HH:mm"
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
if let date = dateFormatter.date(from: dateStr) {
dateFormatter.timeZone = TimeZone.current
dateFormatter.dateFormat = "HH:mm"
return dateFormatter.string(from: date)
}
return nil
}
And then:
let utcTime = formatTime(string: "2022-06-30T02:15:00.000+07:00")
let localTime = utcToLocal(dateStr: utcTime)
print(localTime)
The Result:
09:15
I hope this help you solve your problem.
I have such time which I have to send to the server:
2019-03-06T14:49:55+01:00
I thought that I can do it in such way:
NSDate(timeIntervalSince1970: TimeInterval(NSDate().timeIntervalSince1970))
but I got such time:
2021-01-24 15:42:31 +0000
I thought that I have to user decoding pattern, so used such way:
let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd HH:mm:ss+z"
let dateFormatterPrint = DateFormatter()
dateFormatterPrint.dateFormat = "MMM dd,yyyy"
let time = NSDate(timeIntervalSince1970: TimeInterval(NSDate().timeIntervalSince1970))
if let date = dateFormatterGet.date(from: time.description) {
print(dateFormatterPrint.string(from: date))
} else {
print("There was an error decoding the string")
}
but its output was:
There was an error decoding the string
what means that I can't decode this time in such way. What I did wrong?
You are creating a string from a date from a time interval from a date, three of the conversions are waste.
The conversion failed because time.description doesn't match the format yyyy-MM-dd HH:mm:ss+z
To get an ISO8601 string with time zone the date format is yyyy-MM-dd'T'HH:mm:ssZ and you have to specify a fixed locale
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
let isoString = formatter.string(from: Date())
There is a shorter way as suggested by Rob in the comments
let formatter = ISO8601DateFormatter()
formatter.timeZone = .current
let isoString = formatter.string(from: Date())
how to convert a string hour to millisecond of the day?
for exemple:
let strDate = "06:00 PM"
Or:
let strDate = "09:00 AM"
my code:
let dateString = "06:00 PM"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "HH:mm"
guard let date = dateFormatter.date(from: dateString)
else { fatalError() }
print(date)
for example my string is: 06:00 PM, so I want to have the date in millisecond of today Thursday 20 September 2018 at 06:00 PM
You can set your DateFormatter default date to startOfDay for today, set the formatter locale locale to "en_US_POSIX" when parsing your time then you can simply get your resulting date timeIntervalSince1970 and multiply by 1000:
let strTime = "06:00 PM"
let formatter = DateFormatter()
formatter.defaultDate = Calendar.current.startOfDay(for: Date())
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "hh:mm a"
if let date = formatter.date(from: strTime) {
let milliseconds = date.timeIntervalSince1970 * 1000
print(milliseconds) // 1537477200000
let date2 = Date(timeIntervalSince1970: milliseconds/1000)
print(date2.description(with: .current)) // Thursday, September 20, 2018 at 6:00:00 PM Brasilia Standard Time
}
First, you need to parse the date string:
let dateString = "06:00 PM"
let formatter = DateFormatter()
formatter.defaultDate = Date()
formatter.dateFormat = "hh:mm a"
formatter.locale = Locale(identifier: "en_US_POSIX")
let date = formatter.date(from: dateString)
Then, you need to get the start of day:
let calendar = Calendar.current
let start = calendar.startOfDay(for: date)
After that, get the time interval between date and start:
let timeInterval = date.timeIntervalSince(start)
let milliseconds = timeInterval * 1000.0
I want to convert server UTC time to local time and vice-versa.
Here is my code..
var isTimeFromServer = true
var time:String!
var period:String!
let timeString = "6:59 AM" //Current UTC time
if isTimeFromServer {
let index = timeString.index(timeString.startIndex, offsetBy: 5)
let twelve = timeString.substring(to: index)
var dateString:String!
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "H:mm"
let date12 = dateFormatter.date(from: twelve)!
dateFormatter.dateFormat = "h:mm a"
let date22 = dateFormatter.string(from: date12)
//print(date22)
dateString = date22
//print("dateString=\(dateString)")
time = dateString.components(separatedBy: " ")[0]
period = dateString.components(separatedBy: " ")[1]
}
else {
time = timeString.components(separatedBy: " ")[0]
period = timeString.components(separatedBy: " ")[1]
}
var hour = Int(time.components(separatedBy: ":")[0])
hour = period == "AM" ? hour : hour! + 12
let minute = Int(time.components(separatedBy: ":")[1])
let calender = NSCalendar.current
var datecomponent = DateComponents()
datecomponent.calendar = calender
datecomponent.hour = hour
datecomponent.minute = minute
if !isTimeFromServer {
// local to UTC
datecomponent.timeZone = TimeZone.current
}
else {
datecomponent.timeZone = TimeZone(abbreviation: "UTC")
}
let date = datecomponent.date
let dateFormatter = DateFormatter()
if !isTimeFromServer {
dateFormatter.dateFormat = "H:mm"
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
dateFormatter.string(from: date!)
}
else {
//UTC to local
dateFormatter.dateFormat = "h:mm a"
dateFormatter.timeZone = TimeZone.current
dateFormatter.string(from: date!)
}
I get the local time
o/p: "12:52 PM"
But actual local time and output time difference is 23 minutes.
I don't know what's wrong with your code.But looks too much unnecessary things are there like you're setting calendar, fetching some elements from string.
Here is my small version of UTCToLocal and localToUTC function. But for that you need to pass string in specific format. Cause I've forcly unwrapped date objects. But you can use some guard conditions to prevent crashing your app.
func localToUTC(dateStr: String) -> String? {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "h:mm a"
dateFormatter.calendar = Calendar.current
dateFormatter.timeZone = TimeZone.current
if let date = dateFormatter.date(from: dateStr) {
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
dateFormatter.dateFormat = "H:mm:ss"
return dateFormatter.string(from: date)
}
return nil
}
func utcToLocal(dateStr: String) -> String? {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "H:mm:ss"
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
if let date = dateFormatter.date(from: dateStr) {
dateFormatter.timeZone = TimeZone.current
dateFormatter.dateFormat = "h:mm a"
return dateFormatter.string(from: date)
}
return nil
}
and call these function like below.
print(utcToLocal(dateStr: "13:07:00"))
print(localToUTC(dateStr: "06:40 PM"))
Mrugesh's answer is perfect, but if someone need to use their own formats, or in some different format, I've generalised it so you can give different format or same in both parameters.
func localToUTC(date:String, fromFormat: String, toFormat: String) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = fromFormat
dateFormatter.calendar = NSCalendar.current
dateFormatter.timeZone = TimeZone.current
dateFormatter.date
let dt = dateFormatter.date(from: date)
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
dateFormatter.dateFormat = toFormat
return dateFormatter.string(from: dt!)
}
func UTCToLocal(date:String, fromFormat: String, toFormat: String) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = fromFormat
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
let dt = dateFormatter.date(from: date)
dateFormatter.timeZone = TimeZone.current
dateFormatter.dateFormat = toFormat
return dateFormatter.string(from: dt!)
}
let localDateAsString = UTCToLocal(date: dateAsString!, fromFormat: "hh:mm a, dd MMM yyyy", toFormat: "hh:mm a, dd MMM yyyy")
You can use it as above. Hope it helps.
By the help of Mrugesh Tank Answer,
I have updated his answer and creating the extensions for the date. So that you can easily access the functions from anywhere either from ViewController or either from cell class as well.
extension String {
//MARK:- Convert UTC To Local Date by passing date formats value
func UTCToLocal(incomingFormat: String, outGoingFormat: String) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = incomingFormat
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
let dt = dateFormatter.date(from: self)
dateFormatter.timeZone = TimeZone.current
dateFormatter.dateFormat = outGoingFormat
return dateFormatter.string(from: dt ?? Date())
}
//MARK:- Convert Local To UTC Date by passing date formats value
func localToUTC(incomingFormat: String, outGoingFormat: String) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = incomingFormat
dateFormatter.calendar = NSCalendar.current
dateFormatter.timeZone = TimeZone.current
let dt = dateFormatter.date(from: self)
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
dateFormatter.dateFormat = outGoingFormat
return dateFormatter.string(from: dt ?? Date())
}
}
Example how to use it:-
Note:- eventStartDate is the string which you have to converted in your format like this:- "2018-07-11T16:22:00.000Z"
let finalDate = eventStartDate.UTCToLocal(incomingFormat: "yyyy-MM-dd'T'HH:mm:ss.SSSZ", outGoingFormat: "MMM d, yyyy h:mm a")
To convert a UTC Date to a local system date you could use the following Date extension:
extension Date {
// Convert local time to UTC (or GMT)
func toGlobalTime() -> Date {
let timezone = TimeZone.current
let seconds = -TimeInterval(timezone.secondsFromGMT(for: self))
return Date(timeInterval: seconds, since: self)
}
// Convert UTC (or GMT) to local time
func toLocalTime() -> Date {
// 1) Get the current TimeZone's seconds from GMT. Since I am in Chicago this will be: 60*60*5 (18000)
let timezoneOffset = TimeZone.current.secondsFromGMT()
// 2) Get the current date (GMT) in seconds since 1970. Epoch datetime.
let epochDate = self.timeIntervalSince1970
// 3) Perform a calculation with timezoneOffset + epochDate to get the total seconds for the
// local date since 1970.
// This may look a bit strange, but since timezoneOffset is given as -18000.0, adding epochDate and timezoneOffset
// calculates correctly.
let timezoneEpochOffset = (epochDate + Double(timezoneOffset))
// 4) Finally, create a date using the seconds offset since 1970 for the local date.
return Date(timeIntervalSince1970: timezoneEpochOffset)
}
}
For everyone using TimeZone objects.
I would advise you to create your TimeZone from identifier rather than abbreviation when you have the possibility.
This prevents errors caused by daylight saving.
To illustrate my point let's take an example.
You can instantiate like this
let timeZone = TimeZone(identifier: "Europe/Paris")
or like that
let timeZone = TimeZone(abbreviation: "CEST") or "UTC +2:00"
But this is time zone for summer CEST meaning Central Europe Summer Time
We have CET meaning Central Europe Time for winter which is "UTC +1:00"
You could manage daylight saving by your own with Date.isDaylightSavingsTime but this means more code and you don't have control on where your daylight saving sprang from.
"indicates whether the receiver is currently using daylight saving time" from official doc
All is that is to say favour TimeZone(identifier: ...)
You can use in swift 4/5
var myDate:String = "2020-02-18 14:30:57"
var convertedLocalTime:String = ""
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd H:mm:ss"
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
if let dt = dateFormatter.date(from: myDate) {
dateFormatter.timeZone = TimeZone.current
dateFormatter.dateFormat = "yyyy-MM-dd h:mm a"
convertedLocalTime = dateFormatter.string(from: dt)
} else {
print("There was an error decoding the string")
}
print("convertedLocalTime--",convertedLocalTime)
Please try it:
func convertUTCToLocal(timeString: String) -> String? {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "h:mm a"
dateFormatter.timeZone = TimeZone.init(abbreviation: "UTC")
let timeUTC = dateFormatter.date(from: timeString)
if timeUTC != nil {
dateFormatter.timeZone = NSTimeZone.local
let localTime = dateFormatter.string(from: timeUTC!)
return localTime
}
return nil
}
func convertLocalToUTC(localTime: String) -> String? {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "h:mm a"
dateFormatter.timeZone = NSTimeZone.local
let timeLocal = dateFormatter.date(from: localTime)
if timeLocal != nil {
dateFormatter.timeZone = TimeZone.init(abbreviation: "UTC")
let timeUTC = dateFormatter.string(from: timeLocal!)
return timeUTC
}
return nil
}
var isTimeFromServer = true
var time:String!
var period:String!
let timeString = "6:59 AM" //Current UTC time
if isTimeFromServer {
print(convertUTCToLocal(timeString: timeString))
} else {
print(convertLocalToUTC(localTime: timeString))
}
If you need to convert timestamp you can use timezoneOffset like here:
if let dateStr = model.date, let dateInt = Int(dateStr) {
let timezoneOffset = TimeZone.current.secondsFromGMT()
let localDateInt = dateInt + timezoneOffset
let date = Date(timeIntervalSince1970: Double(localDateInt))
cell.dateLbl.text = date.toShortDateTimeString()
}