I want to print date [1,2,3.... current date] but not getting correct result.
Because when I set first day is "1" in my code, the output in [2,3,4]. And when I set day is "0". It result show correct but show an extra date [1,2,3,4,5]. And today is 4th October 2016, as my time zone.
let date = NSDate()
let components = NSCalendar.currentCalendar().components([.Day , .Month , .Year], fromDate: date)
let year = components.year
let month = components.month
let day = 1 // Output is [2,3,4]
// let day = 0 than o/p [1,2,3,4,5]
dateFormatatter.dateFormat = "MMMM yyyy"
monthNameLabel.text = dateFormatatter.stringFromDate(date)
startDate.year = year
startDate.month = month
startDate.day = day
let startDateNSDate = calendar.dateFromComponents(startDate)!
var dateStart = startDateNSDate // first date
let endDate = NSDate() // last date
dateFormatatter.dateFormat = "dd"
while dateStart.compare(endDate) != .OrderedDescending {
// print(fmt.stringFromDate(date))
// Advance by one day:
dateStart = calendar.dateByAddingUnit(.Day, value: 1, toDate: dateStart, options: [])!
let dateFormat1 = NSDateFormatter()
dateFormat1.dateFormat = "dd-MM-yyyy"
dateArrayCalendar.addObject(dateFormatatter.stringFromDate(dateStart))
dateArrayForCompare.addObject(dateFormat1.stringFromDate(dateStart))
}
And I want result like this [1,2,3,4]
And Same issue Here
let componentsForCompare = calendar.components([.Year, .Month], fromDate: date)
let startOfMonth = calendar.dateFromComponents(componentsForCompare)!
print(startOfMonth)//2016-09-30 18:30:00 +0000
print(dateFormatatter.stringFromDate(startOfMonth)) //01
Its give different Outputs
You need to increment your date at the end of the while loop, rather than at the start:
while dateStart.compare(endDate) != .OrderedDescending {
// print(fmt.stringFromDate(date))
// Advance by one day:
let dateFormat1 = NSDateFormatter()
dateFormat1.dateFormat = "dd-MM-yyyy"
dateArrayCalendar.addObject(dateFormatatter.stringFromDate(dateStart))
dateArrayForCompare.addObject(dateFormat1.stringFromDate(dateStart))
dateStart = calendar.dateByAddingUnit(.Day, value: 1, toDate: dateStart, options: [])!
}
Related
Lets say i have a program that reminds users of their appointments , from the current date until the date of the appointment, i want to find out if a particular date is a week to the appointment or a month to the appointment .
var startDate = startDate
let calendar = Calendar.current
let fmt = DateFormatter()
fmt.dateFormat = "yyyy-MM-dd"
while startDate <= endDate {
var newDate = calendar.date(byAdding: .day, value: 1, to: startDate)!
if newDate is a month to endDate {
//schedule reminder
}
if newDate is a week to endDate{
//schedule reminder
}
how can i check if the current date is a week/month to the appointment ?
You don't need to use any date comparison, you can simply generate the notification dates using Calendar.date(byAdding:value:to:) and just passing the correct components. To set the date 1 week/month before endDate, pass -1 to value.
let oneWeekBeforeAppointment = Calendar.current.date(byAdding: .weekOfYear, value: -1, to: endDate)!
let oneMonthBeforeAppointment = Calendar.current.date(byAdding: .month, value: -1, to: endDate)!
Try this to calculate the duration in days
func DateFormat() -> DateFormatter {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd/MM/yyyy"
dateFormatter.timeZone = TimeZone(abbreviation: "GMT")
return dateFormatter
}
var appointementDate: Date?
var today = Date()
appointementDate = DateFormat().date(from: "22/02/2020")
today = DateFormat().date(from: DateFormat().string(from: today))!
let timeInterval = Int(exactly: (today.timeIntervalSince(appointementDate!))) ?? 0
print("\(timeInterval/86400) days left")
I have to show weekdays date in CollectionView start from Monday to Saturday. Until the end of the week, I have to show that weekdays date only. My task image Image. Please help/advise me how to do this task.
I am getting weekdays but its start from current day, But i need start date from monday,
func arrayOfDates() -> NSArray {
let numberOfDays: Int = 6
let formatter: DateFormatter = DateFormatter()
formatter.dateFormat = "dd"
let startDate = Date()
let calendar = Calendar.current
var offset = DateComponents()
var dates: [Any] = [formatter.string(from: startDate)]
for i in 1..<numberOfDays {
offset.day = i
let nextDay: Date? = calendar.date(byAdding: offset, to: startDate)
let nextDayString = formatter.string(from: nextDay!)
dates.append(nextDayString)
}
return dates as NSArray
}
Try this
func formattedDaysInThisWeekNet() -> [String]
{
// create calendar
let calendar = NSCalendar(identifier: NSCalendar.Identifier.gregorian)!
// today's date
let today = NSDate()
let weekday = calendar.component(.weekday, from: today as Date)
let beginningOfWeek : NSDate
if weekday != 2 { // if today is not Monday, get back
beginningOfWeek = calendar.nextDate(after: today as Date, matching: .weekday, value: 1, options: [.matchNextTime, .searchBackwards])! as NSDate
} else { // today is Monday
beginningOfWeek = calendar.startOfDay(for: today as Date) as NSDate
}
var formattedDays = [String]()
for i in 0..<7 {
let date = calendar.date(byAdding: .day, value: i, to: beginningOfWeek as Date, options: [])!
formattedDays.append(formatDate(date: date as NSDate))
let firstDate = calendar.date(byAdding: .day, value: 0, to: beginningOfWeek as Date, options: [])!
let lastDate = calendar.date(byAdding: .day, value: 6, to: beginningOfWeek as Date, options: [])!
let fullString = "\(formatDateFull(date: firstDate as NSDate)) - \(formatDateFull(date: lastDate as NSDate))" as String
fulldateLbl.text = "< \(fullString) >"
print(fullString)
}
return formattedDays
}
enum Days: Int {
case Sat = 0, Sun, Mon, Tue, Wed, Thu, Fri
static var all = [Mon, Tue, Wed, Thu, Fri, Sat]
}
func getWeekDays(date: Date) -> [Date] {
var weekDates = [Date]()
let cal = Calendar.current
var comps = cal.dateComponents([.weekOfYear, .yearForWeekOfYear], from: date)
let days = Days.all
for day in days {
comps.weekday = day.rawValue
weekDates.append(cal.date(from: comps)!)
}
return weekDates
}
print(getWeekDays(date: Date())) // print all dates from Monday to Saturday
Hi guys thank you for your response. I completed This task.
func arrayOfDates() -> NSArray {
var calendar = Calendar(identifier: Calendar.Identifier.gregorian)
let today = calendar.startOfDay(for: Date())
let dayOfWeek = calendar.component(.weekday, from: today) - calendar.firstWeekday
let weekdays = calendar.range(of: .weekday, in: .weekOfYear, for: today)!
let dayss = (weekdays.lowerBound ..< weekdays.upperBound)
.compactMap { calendar.date(byAdding: .day, value: $0 - dayOfWeek, to: today) }
//.filter { !calendar.isDateInWeekend($0) }
let formatter = DateFormatter()
formatter.dateFormat = "dd"
let strings = dayss.map { formatter.string(from: $0) }
self.dates = strings as NSArray
return dates as NSArray
}
But here I have one question, How to disable the previous dates. I need to select only current date and next dates.
I’m creating a date using NSDateComponents().
let startDate = NSDateComponents()
startDate.year = 2015
startDate.month = 9
startDate.day = 1
let calendar = NSCalendar.currentCalendar()
let startDateNSDate = calendar.dateFromComponents(startDate)!
... now I want to print all dates since the startDate until today, NSDate(). I’ve already tried playing with NSCalendarUnit, but it only outputs the whole difference, not the single dates between.
let unit: NSCalendarUnit = [.Year, .Month, .Day, .Hour, .Minute, .Second]
let diff = NSCalendar.currentCalendar().components(unit, fromDate: startDateNSDate, toDate: NSDate(), options: [])
How can I print all dates between two Dateobjects?
Edit 2019
In the meantime the naming of the classes had changed – NSDate is now just Date. NSDateComponents is now called DateComponents. NSCalendar.currentCalendar() is now just Calendar.current.
Just add one day unit to the date until it reaches
the current date (Swift 2 code):
var date = startDateNSDate // first date
let endDate = NSDate() // last date
// Formatter for printing the date, adjust it according to your needs:
let fmt = NSDateFormatter()
fmt.dateFormat = "dd/MM/yyyy"
// While date <= endDate ...
while date.compare(endDate) != .OrderedDescending {
print(fmt.stringFromDate(date))
// Advance by one day:
date = calendar.dateByAddingUnit(.Day, value: 1, toDate: date, options: [])!
}
Update for Swift 3:
var date = startDate // first date
let endDate = Date() // last date
// Formatter for printing the date, adjust it according to your needs:
let fmt = DateFormatter()
fmt.dateFormat = "dd/MM/yyyy"
while date <= endDate {
print(fmt.string(from: date))
date = Calendar.current.date(byAdding: .day, value: 1, to: date)!
}
Using extension:
extension Date {
static func dates(from fromDate: Date, to toDate: Date) -> [Date] {
var dates: [Date] = []
var date = fromDate
while date <= toDate {
dates.append(date)
guard let newDate = Calendar.current.date(byAdding: .day, value: 1, to: date) else { break }
date = newDate
}
return dates
}
}
Usage:
let datesBetweenArray = Date.dates(from: Date(), to: Date())
Same thing but prettier:
extension Date {
func allDates(till endDate: Date) -> [Date] {
var date = self
var array: [Date] = []
while date <= endDate {
array.append(date)
date = Calendar.current.date(byAdding: .day, value: 1, to: date)!
}
return array
}
}
How to get all dates for next 20 days:
if let date = Calendar.current.date(byAdding: .day, value: 20, to: Date()) {
print(Date().allDates(till: date))
}
Your desired code becomes like
let startDate = NSDateComponents()
startDate.year = 2015
startDate.month = 9
startDate.day = 1
let calendar = NSCalendar.currentCalendar()
let startDateNSDate = calendar.dateFromComponents(startDate)!
var offsetComponents:NSDateComponents = NSDateComponents();
offsetComponents.day = 1
var nd:NSDate = startDateNSDate;
println(nd)
while nd.timeIntervalSince1970 < NSDate().timeIntervalSince1970 {
nd = calendar.dateByAddingComponents(offsetComponents, toDate: nd, options: nil)!;
println(nd)
}
Here is Solution of Print all dates between two Dates (Swift 4 Code)
var mydates : [String] = []
var dateFrom = Date() // First date
var dateTo = Date() // Last date
// Formatter for printing the date, adjust it according to your needs:
let fmt = DateFormatter()
fmt.dateFormat = "yyy-MM-dd"
dateFrom = fmt.date(from: strstartDate)! // "2018-03-01"
dateTo = fmt.date(from: strendDate)! // "2018-03-05"
while dateFrom <= dateTo {
mydates.append(fmt.string(from: dateFrom))
dateFrom = Calendar.current.date(byAdding: .day, value: 1, to: dateFrom)!
}
print(mydates) // Your Result
Output is:
["2018-03-01", "2018-03-02", "2018-03-03", "2018-03-04", "2018-03-05"]
I am using this approach (Swift 3):
import Foundation
class Dates {
static func printDatesBetweenInterval(_ startDate: Date, _ endDate: Date) {
var startDate = startDate
let calendar = Calendar.current
let fmt = DateFormatter()
fmt.dateFormat = "yyyy-MM-dd"
while startDate <= endDate {
print(fmt.string(from: startDate))
startDate = calendar.date(byAdding: .day, value: 1, to: startDate)!
}
}
static func dateFromString(_ dateString: String) -> Date {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
return dateFormatter.date(from: dateString)!
}
}
and I am calling this like:
Dates.printDatesBetweenInterval(Dates.dateFromString("2017-01-02"), Dates.dateFromString("2017-01-9"))
The output is:
2017-01-02
2017-01-03
2017-01-04
2017-01-05
2017-01-06
2017-01-07
2017-01-08
2017-01-09
You can use the compactMap operator.
I like to put these functions in an extension so they are reusable.
It's hard to make a range of dates, so I made a range of ints and loop through that.
extension Calendar {
func getDates(_ startDate: Date, _ endDate: Date) -> [Date] {
// make sure parameters are valid
guard startDate < endDate else { print("invalid parameters"); return [] }
// how many days between dates?
let dayDiff = Int(self.dateComponents([.day], from: startDate, to: endDate).day ?? 0)
let rangeOfDaysFromStart: Range<Int> = 0..<dayDiff + 1
let dates = rangeOfDaysFromStart.compactMap{ self.date(byAdding: .day, value: $0, to: startDate) }
return dates
}
}
Your usage could be:
let startDate = Date(dateString: "1/2/2017", format: "M/d/yyyy")
let endDate = Date(dateString: "1/9/2017", format: "M/d/yyyy")
let dates = Calendar.current.getDates(startDate, endDate)
let f = DateFormatter(withFormat: "yyyy-MM-dd", locale: "us_en")
print(dates.compactMap{f.string(from: $0)}.joined(separator: ", "))
output:
"2017-01-02, 2017-01-03, 2017-01-04, 2017-01-05, 2017-01-06, 2017-01-07, 2017-01-08, 2017-01-09"
I am working on get start and end date from today’s date.
I am getting start and end date of current month by using
formula given by Martin R
Get first and last day of month
It is working perfectly.
My issue is how to put my custom value in this line
let components1 = calendar.components([.Year, .Month], fromDate: date)
Can I replace my custom month value to this code?
My requirement is:
I have one tableView for months like January, etc.
When I will click TableView I am getting current month according to tableview.
Suppose I click on January, I will get value 1.
So how to get start and end date of month using my custom month value?
My Code
let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "dd MM yyyy"
//To Get Start Date of Month
let components1 = calendar.components([.Year,.Day], fromDate: date)
components1.month = 3
let startOfMonth = calendar.dateFromComponents(components1)!
txtStartDate.text = dateFormatter.stringFromDate(startOfMonth)
try this code:
let calendar = NSCalendar.currentCalendar()
let date = "January 2016" // custom value
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MMMM yyyy"
let components = calendar.components([.Year, .Month, .Day], fromDate: dateFormatter.dateFromString(date)!)
let startOfMonth = calendar.dateFromComponents(components)!
dateFormatter.dateFormat = "MM"
print(dateFormatter.stringFromDate(startOfMonth))
//NSLog("%# : %#", startOfMonth,dateFormatter.stringFromDate(startOfMonth));
Output:
01
I am answering my own question
temp number is month number like if January it will considered as 1.
plz go through this solution to get start and end date from custom values
thanks #Martin R
let calendar = NSCalendar.currentCalendar()
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "dd MM yyyy"
//To Get Start Date of Month
let components1 = calendar.components([.Year], fromDate: NSDate())
components1.month = Int(tempNumber!)!
let startOfMonth = calendar.dateFromComponents(components1)!
txtStartDate.text = dateFormatter.stringFromDate(startOfMonth)
//To Get End Date of Month
let comps2 = NSDateComponents()
comps2.month = 1
comps2.day = -1
let endOfMonth = calendar.dateByAddingComponents(comps2, toDate: startOfMonth, options: [])!
txtEndDate.text = dateFormatter.stringFromDate(endOfMonth)
I have made a functioning app and part of it includes formatting the date from a date picker.
I need to change the first day of the week as the week days are being displayed as "1" - "7". However, day 1 is currently Sunday and I need day 1 to be Monday and Sunday as day 7.
The code for my date formatter and picker are below:
var chosenDate = self.datePicker.date
var formatter = NSDateFormatter()
formatter.dateFormat = "ewYY"
let day = formatter.stringFromDate(chosenDate)
let dateResult = "\(day)"
DestViewController.date = dateResult
I got all of my date formatting info from this page:
http://www.unicode.org/reports/tr35/tr35-31/tr35-dates.html#Date_Format_Patterns
I just can't seem to work out how to change this first day of the week?
Many thanks in advance
Mark.
Here is good example in how to manipulate date in swift. you can change the code to fit it better for what you may need, but right now it does what you need.
// Playground - noun: a place where people can play
// Setup the calendar object
let calendar = NSCalendar.currentCalendar()
// Set up date object
let date = NSDate()
// Create an NSDate for the first and last day of the month
let components = NSCalendar.currentCalendar().components(NSCalendarUnit.CalendarUnitMonth, fromDate: date)
components.month
// Getting the First and Last date of the month
components.day = 1
let firstDateOfMonth: NSDate = calendar.dateFromComponents(components)!
components.month += 1
components.day = 0
let lastDateOfMonth: NSDate = calendar.dateFromComponents(components)!
var unitFlags = NSCalendarUnit.WeekOfMonthCalendarUnit |
NSCalendarUnit.WeekdayCalendarUnit |
NSCalendarUnit.CalendarUnitDay
let firstDateComponents = calendar.components(unitFlags, fromDate: firstDateOfMonth)
let lastDateComponents = calendar.components(unitFlags, fromDate: lastDateOfMonth)
// Sun = 1, Sat = 7
let firstWeek = firstDateComponents.weekOfMonth
let lastWeek = lastDateComponents.weekOfMonth
let numOfDatesToPrepend = firstDateComponents.weekday - 1
let numOfDatesToAppend = 7 - lastDateComponents.weekday + (6 - lastDateComponents.weekOfMonth) * 7
let startDate: NSDate = calendar.dateByAddingUnit(NSCalendarUnit.CalendarUnitDay, value: -numOfDatesToPrepend, toDate: firstDateOfMonth, options: nil)!
let endDate: NSDate = calendar.dateByAddingUnit(NSCalendarUnit.CalendarUnitDay, value: numOfDatesToAppend, toDate: lastDateOfMonth, options: nil)!
Array(map(0..<42) {
calendar.dateByAddingUnit(NSCalendarUnit.CalendarUnitDay, value: $0, toDate: startDate, options: nil)!
})
"\(components.year)"
//var dateString = stringFromDate(NSDate())// change to your date format
var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "EE"
var dateString = dateFormatter.stringFromDate(NSDate())
var xdate = dateFormatter.dateFromString(dateString)
//var someDate = dateFormatter.dateString
println(dateString)
this will output::
"Thu"