disply the current week start and end date - iphone

Question

I want to display the Current week in UINavigationBar and then click on Next or Previous button to display the Previous week or Next week
Example:
July 22 - July 28
July 29 - Auguest 4

Answer 1

To get first date of the week you can do something like this :
- (NSDate *)firstDayOfWeekFromDate:(NSDate *)date {
CFCalendarRef currentCalendar = CFCalendarCopyCurrent();
NSDateComponents *components = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:date];
[components setDay:([components day] - ([components weekday] - CFCalendarGetFirstWeekday(currentCalendar)))];
//[components setDay:(CFCalendarGetFirstWeekday(currentCalendar))];
[components setHour:0];
[components setMinute:0];
[components setSecond:0];
CFRelease(currentCalendar);
return [CURRENT_CALENDAR dateFromComponents:components];
}
After getting first week of the day you can calculate days as suggested in above answer by #vikas
:)

Answer 2

NSDate * selectedDate = [NSDate date];
-(IBAction)Week_CalendarActionEvents:(id)sender{
NSCalendar *gregorian = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
NSDateComponents *offsetComponents = [[[NSDateComponents alloc] init] autorelease];
NSDate *nextDate;
if(sender==Week_prevBarBtn) // Previous button events
[offsetComponents setDay:-7];
else if(sender==Week_nextBarBtn) // next button events
[offsetComponents setDay:7];
nextDate = [gregorian dateByAddingComponents:offsetComponents toDate:selectedDate options:0];
selectedDate = nextDate;
[selectedDate retain];
NSDateComponents *components = [gregorian components:NSWeekCalendarUnit fromDate:selectedDate];
NSInteger week = [components week];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"MMMM YYYY"];
NSString *stringFromDate = [formatter stringFromDate:selectedDate];
[formatter release];
[Week_weekBarBtn setTitle:[NSString stringWithFormat:#"%#,Week %d",stringFromDate,week]];
}