Issue in count down days hours minutes from NSDate - iphone

Question

I am struggling with updating UILabel for count down for that I use following code
- (void)updateLabel {
// convert date string to date then set to a label
NSDateFormatter *dateStringParser = [[NSDateFormatter alloc] init];
[dateStringParser setDateFormat:#"MM/dd/yyyy"];
NSLog(#"date from update label %#", _selectedBirthdate);
//OUTPUT date from update label 07/23/2013
NSDate *date = [dateStringParser dateFromString:_selectedBirthdate];
NSLog(#"date from update label %#", date);
NSTimeInterval timeInterval = [date timeIntervalSinceNow]; ///< Assuming this is in the future for now.
NSString *stringVariable = [self stringFromTimeInterval:timeInterval];
self.dayLable.text = [NSString stringWithFormat:#"%#", stringVariable];
self.hourLable.text = [NSString stringWithFormat:#"%#", stringVariable];
self.minutesLable.text = [NSString stringWithFormat:#"%#", stringVariable];
// i want to update this day hour minutes lable like this much of days hour and minutes remaining
NSLog(#"%#",stringVariable);
}
I use following method for counting days hours and minutes but I dont know whats the logic mind is not working here how to find days hours and minutes from interval
- (NSString *)stringFromTimeInterval:(NSTimeInterval)interval {
NSInteger ti = (NSInteger)interval;
NSLog(#"%d",ti);
// NSInteger seconds = ti % 60;
NSInteger days = (ti * 60);
NSInteger minutes = (ti / 60) % 60;
NSLog(#"%d",minutes);
NSInteger hours = (ti / 3600);
NSLog(#"%d",hours);
return [NSString stringWithFormat:#"%02i hours : %02i min", hours, minutes];
}

Answer 1

To count no. of days, months and years, apply below code.
double differenceSeconds;
double datediff;
NSDateFormatter* df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"YYYY-MM-dd HH:mm:ss ZZZ"];
[df setTimeZone:[NSTimeZone systemTimeZone]];
NSDate *todayDate = [NSDate date];
long long tdate =[todayDate timeIntervalSince1970];
datediff = tdate - yourdate;
int days=(int)((double)datediff/(3600.0*24.00));
int diffDay=datediff-(days*3600*24);
int diffhours=(int)((double)diffDay/3600.00);
int diffMin=diffDay-(diffhours*3600);
int diffminutes=(int)(diffMin/60.0);