I am using below code to get current date and formatting it.
But seeing error "Cannot invoke initiliazer for type "Date" with no arguments"
let currentDateTime = Date()
// initialize the date formatter and set the style
let formatter = DateFormatter()
formatter.timeStyle = .medium
formatter.dateStyle = .long
// get the date time String from the date object
formatter.string(from: currentDateTime) // October 8, 2016 at 10:48:53 PM
screenshot
You may not be placing the code in the correct location. Make sure it is inside a function of some kind. You can could even place this inside viewDidLoad().
override func viewDidLoad() {
super.viewDidLoad()
let currentDateTime = Date()
// initialize the date formatter and set the style
let formatter = DateFormatter()
formatter.timeStyle = .medium
formatter.dateStyle = .long
// get the date time String from the date object
let mytime = formatter.string(from: currentDateTime) // October 8, 2016 at 10:48:53 PM
print(mytime)
}
func getcurrentDate() {
let currentDateTime = Date()
// initialize the date formatter and set the style
let formatter = DateFormatter()
formatter.timeStyle = .medium
formatter.dateStyle = .long
// get the date time String from the date object
let mytime = formatter.string(from: currentDateTime) // October 8, 2016 at 10:48:53 PM
print(mytime)
}
I suggest you use this approach to Formatter Style (Swift 3):
formatter.dateStyle = DateFormatter.Style.full
formatter.timeStyle = DateFormatter.Style.long
In this case for a date as string with your locale:
let currentDate = Date()
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "----your locale here----")
formatter.dateStyle = DateFormatter.Style.full
let myDate = todayFormatter.string(from: currentDate)
print(myDate)
swift 4
==> Getting iOS device current time:-
let hh1 = Calendar.current.component(.hour, from: Date())
let mm1 = Calendar.current.component(.minute, from: Date())
let ss1 = Calendar.current.component(.second, from: Date())
print(hh1, ":", mm1, ":", ss1)
output: ---> 11 : 10: 25
Related
I have a string that looks like this: "2021-08-05"
I would like to convert it into a date so that I can display it as "5th August 2021"
My code below just returns as nil and I don't understand why. Any help would be appreciated.
Code:
func stringToDate(dateString: String){
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd"
formatter.dateStyle = .long
let newDate = formatter.date(from: dateString)
print("formatter: \(newDate)")
}
I call the function as an action for a button (SwiftUI), so when the button is clicked the date should show.
Button("Go"){
stringToDate(dateString: "2021-08-05")
}
Removing the dateStyle line fixes it, and an actual date is printed.
Code:
func stringToDate(dateString: String){
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd"
let newDate = formatter.date(from: dateString)
print("formatter: \(newDate)")
}
// Prints: formatter: Optional(2021-08-04 23:00:00 +0000)
To do the whole conversion, the following function will work:
func convertDate(from original: String) -> String? {
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd"
guard let date = formatter.date(from: original) else { return nil }
formatter.dateStyle = .long
let string = formatter.string(from: date)
return string
}
// Prints: Optional("August 5, 2021")
Of course, this may be printed slightly different due to my location & language
The following line of code can only be run after getting a Date otherwise you are 'overwriting' the dateFormat:
formatter.dateStyle = .long
You're overriding the .dateFotrmat setting with the .dateStyle setting.
If you want to do it this way, use the format string to convert the string to a date, then the style to output it.
func stringToDate(dateString: String){
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd"
let newDate = formatter.date(from: dateString)
formatter.dateStyle = .long
print("formatter: \(formatter.string(from: newDate!) )")
}
which give the output you wanted:
formatter: August 5, 2021
I am getting a string from API containing date and time as:
createdAt = "2019-08-12T10:34:05.000Z"
I need to extract date from this string and time also.
And how can I get difference as time between two given date strings?
e.g. If I have two strings as:
StartedOn = "2019-08-12T10:32:18.000Z"
StopedOn = "2019-08-12T10:34:05.000Z".
How to get time from start to stop.
swift 4, Xcode 10
Use DateFormatter to get the Date instance from the String, i.e.
let str = "2019-08-12T10:34:05.000Z"
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
let date = formatter.date(from: str)
Now, to get the time difference use timeIntervalSince(_:) with the 2 Date objects, i.e.
let startedOn = "2019-08-12T10:32:18.000Z"
let stoppedOn = "2019-08-12T10:34:05.000Z"
if let startedOnDate = formatter.date(from: startedOn), let stoppedOnDate = formatter.date(from: stoppedOn) {
let timeInterval = stoppedOnDate.timeIntervalSince(startedOnDate)
print(timeInterval)
}
In case you need more detailed components between 2 Date objects, use Calendar object like so,
if let startedOnDate = formatter.date(from: startedOn), let stoppedOnDate = formatter.date(from: stoppedOn) {
let calendar = Calendar(identifier: .gregorian)
let components = calendar.dateComponents([.hour, .minute, .second], from: startedOnDate, to: stoppedOnDate)
print(components) //hour: 0 minute: 1 second: 47
}
Edit:
To get the date and time separately from Date object,
let str = "2019-08-12T10:34:05.000Z"
let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
if let date = formatter.date(from: str) {
formatter.dateFormat = "hh:mm:ss a"
let timeStr = formatter.string(from: date)
print(timeStr) //add timeStr to your timeLabel here...
formatter.dateFormat = "yyyy-MM-dd"
let dateStr = formatter.string(from: date)
print(dateStr) //add dateStr to your dateLabel here...
}
Try with this :D
import datetime
StartedOn = "2019-08-12T10:32:18.000Z"
StopedOn = "2019-08-12T10:34:05.000Z"
StartedOn = datetime.datetime.fromisoformat(StartedOn[:-1])
StoppedOn = datetime.datetime.fromisoformat(StopedOn[:-1])
print(StoppedOn - StartedOn)
There are two dedicated date formatters for that purpose, ISO8601DateFormatter to convert the ISO8601 string to Date
let isoFormatter = ISO8601DateFormatter()
isoFormatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
let createdAtDate = isoFormatter.date(from: "2019-08-12T10:34:05.000Z")
let startedOn = "2019-08-12T10:32:18.000Z"
let stopedOn = "2019-08-12T10:34:05.000Z"
let startedOnDate = isoFormatter.date(from: startedOn)!
let stopedOnDate = isoFormatter.date(from: stopedOn)!
and DateComponentsFormatter to get a m:ss string from the difference between start and end date
let componentsFormatter = DateComponentsFormatter()
componentsFormatter.allowedUnits = [.minute, .second]
let duration = componentsFormatter.string(from: startedOnDate, to: stopedOnDate)
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
}
I'm looking to call a function that checks time elapsed since date. This will determine how the timeLable displays in my messages view controller, similar to IMessage.
The code I'm using below only shows HH:MM
let date = dateFormatter().dateFromString((recent["date"] as? String)!)
timeLabel.text = NSDateFormatter.localizedStringFromDate(date!, dateStyle: NSDateFormatterStyle.NoStyle, timeStyle: NSDateFormatterStyle.NoStyle)
I'm looking to change it to something along the lines of:
If date is today, date = "HH:MM"
If date is Yesterday, date = "Yesterday"
If date is the day before yesterday and so on, date = "Monday, Tuesday, Wednesday..."
If date is over 1 week, date = MM/DD/YY
Or try this. Note that we have to use components:fromDate: and then use components:fromDateComponents:toDateComponents:options: because if we don't 23:59 last night returns 23:59 instead of Yesterday.
extension NSDateFormatter {
static func friendlyStringForDate(date:NSDate) -> String {
// Fetch the default calendar
let calendar = NSCalendar.currentCalendar()
// Compute components from target date
let from = calendar.components([.Day, .Month, .Year], fromDate: date)
// Compute components from current date
let to = calendar.components([.Day, .Month, .Year], fromDate: NSDate())
// Compute days difference between the two
let delta = calendar.components(.Day, fromDateComponents: from, toDateComponents: to, options: [])
switch delta.day {
case 0:
let formatter = NSDateFormatter()
formatter.timeZone = NSTimeZone.defaultTimeZone()
formatter.dateFormat = "HH:mm"
return formatter.stringFromDate(date)
case 1:
return "Yesterday"
case 2..<7:
let formatter = NSDateFormatter()
formatter.timeStyle = .NoStyle
formatter.dateFormat = "EEEE"
return formatter.stringFromDate(date)
default:
let formatter = NSDateFormatter()
formatter.timeStyle = .NoStyle
formatter.dateFormat = "MM/dd/YY"
return formatter.stringFromDate(date)
}
}
}
Now then, to use it just:
timeLabel.text = NSDateFormatter.friendlyStringForDate(date!)
SWIFT 3:
extension DateFormatter {
static func friendlyStringForDate(date: Date) -> String {
// Fetch the default calendar
let calendar = Calendar.current
let unitFlags: NSCalendar.Unit = [.day]
// Compute days difference between the two
let delta = (calendar as NSCalendar).components(unitFlags, from: date, to: Date(), options: [])
if let day = delta.day {
switch day {
case 0:
let formatter = DateFormatter()
formatter.timeZone = NSTimeZone.default
formatter.dateFormat = "hh:mm a"
return formatter.string(from: date)
case 1:
return "Yesterday"
case 2..<7:
let formatter = DateFormatter()
formatter.timeStyle = .none
formatter.dateFormat = "EEEE"
return formatter.string(from: date)
default:
let formatter = DateFormatter()
formatter.timeStyle = .none
formatter.dateFormat = "MM/dd/YY"
return formatter.string(from: date)
}
}
return ""
}
}
func date() -> String {
return NSDateFormatter.localizedStringFromDate(NSDate(), dateStyle: NSDateFormatterStyle.ShortStyle, timeStyle: NSDateFormatterStyle.MediumStyle)
}
var date = date() // 2016. 5. 13. 오전 4:45:16
above code, date obtain korean current value of date every time that i call date()
I'll hope to have refresh new value from NSDate(), and so insert refresh new value into varibles like below code
var yearMonDay = "2016. 5. 13"
var hourMinSec = "오전 4:45:16"
hmmm Are there methods to divide NSDate() into pieces like below code?
yearMonDay = NSDate().?? // refresh date "year: month: day"
hourMinSec = NSDate().?? // refresh date "am/fm hour:minute:second
Splitting up components like hour can be done using the components of the NSCalendar
let today = NSDate()
let calendar = NSCalendar(identifier: NSCalendarIdentifierGregorian)!
let components = calendar.components([.Year, .Month, .Day, .Hour, .Minute, .Second], fromDate: today)
print("\(components.month) \(components.day) \(components.year)")
print("\(components.hour) \(components.minute) \(components.second)")
With the NSDate formatter you can find the names
let formatter = NSDateFormatter()
let monthName = formatter.monthSymbols[components.month-1]
print(monthName)
You can use the NSDateFormatterStyle:
// get the current date and time
let currentDateTime = NSDate()
// initialize the date formatter and set the style
let formatter = NSDateFormatter()
// October 26, 2015
formatter.timeStyle = NSDateFormatterStyle.NoStyle
formatter.dateStyle = NSDateFormatterStyle.LongStyle
formatter.stringFromDate(currentDateTime)
// 6:00:50 PM
formatter.timeStyle = NSDateFormatterStyle.MediumStyle
formatter.dateStyle = NSDateFormatterStyle.NoStyle
formatter.stringFromDate(currentDateTime)