In Swift, how to set default date entry to today - swift

I want a user to enter a start date in a text field.
How do I set the default date of the text field to today's date?
Simples?


In your viewDidLoad() try this:
let dateFormatter = NSDateFormatter()
dateFormatter.dateStyle = .MediumStyle
dateFormatter.timeStyle = .NoStyle
yourTextField.text = dateFormatter.stringFromDate(NSDate())
Refer to the Apple docs to learn more about NSDateFormatter


This should work:
override func viewDidLoad() {
super.viewDidLoad()
let todaysDate = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM dd, yyyy"
let dateString = dateFormatter.string(from: todaysDate)
yourTextField.text = dateString
}

Related

Creating Date object from timestamp in Swift [duplicate]

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

SwiftUI string to formatted date (ISO)

can you please help me with that topic?
from the API i get the following date as a string: 2021-05-21T14:35:15.647+02:00
How can i convert this to a date object, so that i can format it?
I tried it in different ways as subscribed here in stackoverflow or in other tutorials, like this:
let date = "2021-05-21T14:35:15.647+02:00"
func formatStringDate(date: String) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
let newDate = dateFormatter.date(from: date)
dateFormatter.setLocalizedDateFormatFromTemplate("MMMM d, yyyy")
return dateFormatter.string(from: newDate!)
}
var newDate = formatStringDate(date: date)
print(newDate)
or
let timestampString = "2018-12-09T11:08:48-05:00"
if let date = isoDateFormatter.date(from: timestampString) {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMMM, dd, yyyy h:mm a"
let dateFormattedString = dateFormatter.string(from: date)
print(dateFormattedString) // December, 09, 2018 11:08 AM
} else {
print("not a valid date")
}
But it´s not working.
Thanks for your help

Thanks for your help, i got the following snippet to work:
let dateString = "2021-05-21T14:35:15.647+02:00"
let inputFormatter = ISO8601DateFormatter()
inputFormatter.formatOptions = [
.withFractionalSeconds,
.withFullDate
]
let date = inputFormatter.date(from: dateString)
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd.MM.YYYY"
print(dateFormatter.string(from: date!))
Thanks

swift 4 Date from from ISO string to custom format?

I have ISO date from API I want to convert it to another custom date format, I've checked some threads here it's look like I have to use the extension on Date class, unfortunately, all my attempts failed.
this example for date i have :
2014-10-22T00:00:00+00:00
I want to convert it to July 2014
can I use normal Date class to do it?
and below what I am trying to do
let formatter = ISO8601DateFormatter()
let date = formatter.date(from: "2016-08-26T12:39:00Z")
let string = formatter.string(from: Date())

Try it:
let formatter = ISO8601DateFormatter()
if let date = formatter.date(from: "2014-10-22T00:00:00+00:00") {
let string = date.stringDate
print(string) // October 2014
}
extension Date {
var stringDate: String {
let formatter = DateFormatter()
formatter.dateFormat = "MMMM yyyy"
return formatter.string(from: self)
}
}

my Date load from SQL Server and format like this "2018-01-17T03:08:28.158769" the code below is work for me perfectly
let isoDate = "2018-01-17T03:08:28.158769"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSSSS"
let date = dateFormatter.date(from:isoDate!)!
dateFormatter.dateFormat = "d.MMMM.YYYY"
let displayDate = dateFormatter.string(from: date)
displayDateInLabel.text = displayDate
result
17.January.2018

You can get Month and Year like this
override func viewDidLoad() {
super.viewDidLoad()
print(getFormattedDate(date: Date()))
}
func getFormattedDate(date: Date) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMMM YYYY"
let strMonth = dateFormatter.string(from: date)
return strMonth
}

Convert string with timezone to date

I have this type of string and want to convert it to date
"2017-05-27T00:00:00.000+0400"
but none of this formatters convert it to date
"yyyy-MM-dd'T'HH:mm:SSSZ"
"yyyy-MM-dd'T'HH:mm:SSSX"

Your forgot to add ss for seconds so correct formate should be yyyy-MM-dd'T'HH:mm:ss.SSSZ
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
let date = dateFormatter.date(from: "2017-05-27T00:00:00.000+0400")

Your error was that the seconds were missing. So the right format should be: yyyy-MM-dd'T'HH:mm:ss.SSSZ. You can also use an extension for this purpose:
extension String {
var toCustomDate: Date {
return Date.Formatter.customDate.date(from: self)!
}
}
extension Date {
struct Formatter {
static let customDate: DateFormatter = {
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
return formatter
}()
}
var customDate: String {
return Formatter.customDate.string(from: self)
}
}
let str = "2017-05-27T00:00:00.000+0400"
let date = str.toCustomDate
If you have more date formats, then just add them to the extensions.

you can do like this
let dateString = "2017-05-27T00:00:00.000+0400"
let formachanger = DateFormatter()
formachanger .dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
if let dateFromString = formachanger .date(from: dateString) {
formachanger .dateFormat = "yyyy-MM-dd HH:mm"
let stringFromDate = formachanger .string(from: dateFromString)
}

try this function
func getGMTDateFrom(String string : String) -> Date? {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEE, dd MMM yyyy hh:mm:ss zz"
let dateObj = dateFormatter.date(from: string)
return dateObj
}
Change date format according to your need.

Swift D-Day UIPickerDate

I have a
#IBOutlet weak var EndDatePicker: UIDatePicker?
what I want to is, If a string called date is nil, set the datePicker to Today, the "D-Day":
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
if(task?.date != nil){
let date = dateFormatter.dateFromString(task!.date!)
EndDatePicker!.date = date!
}else{
//EndDatePicker!.date = D-Day?
}
Thank you for your help, I don't find on internet the way to do this on swift.
Regards.

try this :
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let dateString = dateFormatter.stringFromDate(NSDate())
let text = dateString

Since Swift 1.2 you can perform two optional binding checks in the same line.
The first check is if date is nil, the second if the dateformatter could create a valid date
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
if let dateString = task?.date, date = dateFormatter.dateFromString(dateString) {
EndDatePicker.date = date
}
else {
EndDatePicker.date = NSDate()
}