I created an application and in that application if date is changed the application starts from splash screen on re-entering and if date is not changed and u re-enters the application then it open in page where u leaved.Not working in USA timezone.

Question

I created an application and in  that application if date is changed the application starts from splash screen on re-entering and if date is not changed and u re-enters the application then it open in page where u leaved.It works fine in our side (Timezone,kolkata ,india even for Timezone,slvaniya,USA) but our USA client is telling that on changing the date it not starts from start-up sequence.Can anyone plz suggest the reason for it.

Answer 1

This is the code which we have used.
//////////Return if it is first time for the day or not//////////////
+ (BOOL)isFirstTimeToday {
BOOL result = YES;
NSDate *now = [[NSDate alloc] init];     /// represents the current time
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [gregorian components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate: now];
NSDate *today = [gregorian dateFromComponents:components];
[now release];
[gregorian release];
NSDate *savedDate = [[NSUserDefaults standardUserDefaults] objectForKey:LAST_TIME_VISITED];
if (savedDate) {
if ([today earlierDate:savedDate] == today) {
result = NO;
return result;
////////Stores the date/////////////
+ (void)userDidVisitReenforceScreenToday {
[[NSUserDefaults standardUserDefaults] setObject:[NSDate todayAtMidnight] forKey:LAST_TIME_VISITED];
////////////What [NSDate todayAtMidnight] stores/////////////////////
+ (NSDate *)daysFromNowAtMidnight:(NSInteger)nOfDays {
NSDate *date = [NSDate dateWithTimeIntervalSinceNow: (86400*nOfDays)];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [gregorian components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate: date];
NSDate *dateAtMidnight = [gregorian dateFromComponents:components];
[gregorian release];
NSLog(@"dateAtMidnight : %@",dateAtMidnight);
return dateAtMidnight;
+ (NSDate *)todayAtMidnight {
return [self daysFromNowAtMidnight:0];
Please Suggest..