iPhone: Date conversion issues - iphone

Question

I need to check an event date, which should be between Current date and 60 days from now. The below code is used, but it is NOT working correctly. Please note, i'm getting event string like this - "2012-04-14T16:50:02Z" from my server.
// current date
double currDateInMilliSecs = [NSDate timeIntervalSinceReferenceDate] * 1000;
NSLog(#"currDateInMilliSecs: %f", currDateInMilliSecs);
// sixty days
double sixtydaysvalue = 60.0 * 24.0 * 3600.0 * 1000.0;
NSLog(#"sixtydaysvalue: %f", sixtydaysvalue);
// add current date + sixt days
double sixtyDaysMilliSecsFromCurrDate = currDateInMilliSecs + sixtydaysvalue;
NSLog(#"sixtyDaysMilliSecsFromCurrDate: %f", sixtyDaysMilliSecsFromCurrDate);
// check does the event date between current date + 60 days
NSDateFormatter *df = [[NSDateFormatter alloc] init];
//[df setTimeZone:[NSTimeZone timeZoneWithName:#"UTC"]];
[df setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss'Z'"];
//[df setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
// [eventDict objectForKey:#"begin_at"] gives date string like this "2012-04-14T16:50:02Z" for ex.
NSDate *eventdate = [df dateFromString:[eventDict objectForKey:#"begin_at"]];
NSTimeInterval nowSinceEventDate = [eventdate timeIntervalSince1970];
NSLog(#"nowSinceEventDate: %f", nowSinceEventDate);
double eventDateInMilliSecs = nowSinceEventDate * 1000;
NSLog(#"eventDateInMilliSecs: %f", eventDateInMilliSecs);
// this is not working as expected
if ( eventDateInMilliSecs<sixtyDaysMilliSecsFromCurrDate && eventDateInMilliSecs>currDateInMilliSecs )
{
}
else
{
}
Any help please?

Answer 1

try this
[dateFormatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss SSS"];

Answer 2

Try this:
NSString *dateString = #"2012-04-14T16:50:02Z";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss'Z'"];
NSDate *eventDate = [formatter dateFromString:dateString];
NSTimeInterval nowSinceEventDate = [eventDate timeIntervalSince1970];
NSLog(#"interval = %f", nowSinceEventDate);
UPDATE:
NSString *dateString = #"2012-05-21T16:50:02Z";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss'Z'"];
NSDate *eventDate = [formatter dateFromString:dateString];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [[NSDateComponents alloc] init];
[components setDay:60];
NSDate *minDate = [NSDate date];
NSDate *maxDate = [gregorian dateByAddingComponents:components toDate:minDate options:0];
NSLog(#"eventDate interval = %f", [eventDate timeIntervalSince1970]);
NSLog(#"minDate interval = %f", [minDate timeIntervalSince1970]);
NSLog(#"maxDate interval = %f", [maxDate timeIntervalSince1970]);
BOOL isBetween = (([eventDate compare:minDate] == NSOrderedDescending) && ([eventDate compare:maxDate] == NSOrderedAscending));
NSLog(#"isBetween = %d", isBetween);

Answer 3

NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"yyyy-MM-dd HH:mm:ss:SSS"];
// [eventDict objectForKey:#"begin_at"] gives "2012-04-14T16:50:02Z"
NSDate *eventdate = [df dateFromString:[eventDict objectForKey:#"begin_at"]];
[df setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
SSS for milli seconds