Getting weekdays and dates for a week - ios

Question

I am working on an app where I need to create a weekly calendar. For this I will need days and dates of current week(Sun Sep30, Mon Oct 1, Tue Oct2 etc.). Can someone please guide me how to achieve this?
Regards
Pankaj

Answer 1

Here is a simple function which extracts date for all the days in this week, staring from Sunday this week to Saturday,
func formattedDaysInThisWeek() -> [String] {
// create calendar
let calendar = NSCalendar(identifier: NSCalendarIdentifierGregorian)!
// today's date
let today = NSDate()
let todayComponent = calendar.components([.Day, .Month, .Year], fromDate: today)
// range of dates in this week
let thisWeekDateRange = calendar.rangeOfUnit(.Day, inUnit:.WeekOfMonth, forDate:today)
// date interval from today to beginning of week
let dayInterval = thisWeekDateRange.location - todayComponent.day
// date for beginning day of this week, ie. this week's Sunday's date
let beginningOfWeek = calendar.dateByAddingUnit(.Day, value: dayInterval, toDate: today, options: .MatchNextTime)
var formattedDays: [String] = []
for i in 0 ..< thisWeekDateRange.length {
let date = calendar.dateByAddingUnit(.Day, value: i, toDate: beginningOfWeek!, options: .MatchNextTime)!
formattedDays.append(formatDate(date))
}
return formattedDays
}
func formatDate(date: NSDate) -> String {
let format = "EEE MMMdd"
let formatter = NSDateFormatter()
formatter.dateFormat = format
return formatter.stringFromDate(date)
}
If you call method formattedDaysInThisWeek(), the output is like this,
["Sun Oct11", "Mon Oct12", "Tue Oct13", "Wed Oct14", "Thu Oct15", "Fri Oct16", "Sat Oct17"]

Answer 2

Do you just need it for this week? If so, here's some code that you should be able to use:
- (NSString *)stringOfDatesOfThisWeek {
NSArray *datesOfThisWeek = [self dateOfTheWeek:[NSDate date]];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"EEE MMM d"];
NSMutableString *dateStringForThisWeek = [[NSMutableString alloc] initWithString:[formatter stringFromDate:[datesOfThisWeek firstObject]]];
for (int i = 1; i < datesOfThisWeek.count; i++) {
[dateString appendFormat:#", %#", [formatter stringFromDate:[datesOfThisWeek objectAtIndex:i]]];
}
}
- (NSArray *)datesOfTheWeek:(NSDate *)todaysDate {
NSCalendar *calendar = [NSCalendar currentCalendar];
NSInteger weekNumber = [[calendar components: NSWeekCalendarUnit fromDate:todaysDate] week];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *comp = [gregorian components:NSYearCalendarUnit fromDate:todaysDate];
[comp setWeek:weekNumber]; //Week number.
NSMutableArray *dates = [NSMutableArray new];
for (int i = 0; i < 7; i++) {
[comp setWeekday:1]; //First day of the week. Change it to 7 to get the last date of the week
NSDate *resultDate = [gregorian dateFromComponents:comp];
[dates addObject:resultDate];
}
return dates;
}
and after typing all of that without Xcode, I realized that this question was asked about Swift. I'm leaving it in case someone wants an Objective-C answer and stumbles across this.

Answer 3

If I understood it correctly, to get expected date format you can use NSDateFormatter with following formatter:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat:#"EEEE, MMM d";
NSLog(#"%#", [dateFormatter stringFromDate:[NSDate date]]);
You can also set locale for date formatter to get weekdays in specified language:
[dateFormatter setLocale:[NSLocale localeWithLocaleIdentifier:#"en_GB"]];
For more details please refer to Data Formatting Guide

Answer 4

Updated Objective - c Code of #fennelouski :
- (NSString *)stringOfDatesOfThisWeek {
NSArray *datesOfThisWeek = [self datesOfTheWeek:[NSDate date]];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"EEE MMM d"];
NSMutableString *dateStringForThisWeek = [[NSMutableString alloc] initWithString:[formatter stringFromDate:[datesOfThisWeek firstObject]]];
for (int i = 1; i < datesOfThisWeek.count; i++) {
[dateStringForThisWeek appendFormat:#", %#", [formatter stringFromDate:[datesOfThisWeek objectAtIndex:i]]];
}
return dateStringForThisWeek;
}
- (NSArray *) datesOfTheWeek:(NSDate *)todaysDate {
NSCalendar *calendar = [NSCalendar currentCalendar];
NSInteger weekNumber = [[calendar components: NSCalendarUnitWeekOfMonth fromDate:todaysDate] weekOfMonth];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateComponents *comp = [gregorian components:NSCalendarUnitYear fromDate:todaysDate];
[comp setWeekOfMonth:weekNumber]; //Week number.
NSMutableArray *dates = [NSMutableArray new];
for (int i = 0; i < 7; i++) {
[comp setWeekday:1]; //First day of the week. Change it to 7 to get the last date of the week
NSDate *resultDate = [gregorian dateFromComponents:comp];
[dates addObject:resultDate];
}
return dates;
}