Let's say it's now morning in my place 10:00AM. I need to get 2 NSDates, one of yesterday (or today) night at 12:01, and the other of today at 11:59 at night.
I have seen here something like this:
NSDate *today = [NSDate date];
//intervals taken from Google
NSDate *yesterday = [today dateByAddingTimeInterval: -86400.0];
But this number is a const. How would I subtract from now's date what is needed to get today's 12:01 at night (past) and today's 11:59 at night (future)?
You write your own logic as you need
You will get the NSDate components using
NSDate *date = [NSDate date];
NSDateComponents *components = [[NSCalendar currentCalendar] components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear fromDate:date];
NSInteger day = [components day];
NSInteger month = [components month];
NSInteger year = [components year];
NSInteger hours = [components hour];
NSInteger mins = [components minute];
NSInteger secs = [components second];
Now you can change the hours and mins a
hours -= 10;
mins -= 120
Now again the form the date object
[date setHour:hours];
[date setMinute:mins];