dynamically create date for previous sunday at 12:00 AM

Question

I\'m struggling to figure out how to dynamically create a date object for the most previous sunday at 12:00 AM

I was thinking I could get today\'s date and then subt

Answer 1

I'll leave worrying about transitions between daylight savings time to you:

NSCalendar *gregorian = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];

NSDate *date = [NSDate date];
NSLog(@"date %@", date);

NSDateComponents *componentsToday = [gregorian components:NSWeekdayCalendarUnit fromDate:date]; // NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit | 
NSInteger days = componentsToday.weekday - 1;
NSLog(@"Days=%d", days);

NSDate *lastSunday = [date dateByAddingTimeInterval:-days*60*60*24];
NSLog(@"lastSunday %@", lastSunday);

NSDateComponents *componentsSunday = [gregorian components:NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit  fromDate:lastSunday];
[componentsSunday setHour:0];
[componentsSunday setMinute:0];
[componentsSunday setSecond:0];
NSDate *targetDate = [gregorian dateFromComponents:componentsSunday];
NSLog(@"TargetDate %@", targetDate);