how to store time in NSDate without date?

Question

I have a timer in my app. When I click on exit buton then timer gets stop and stores value into the string in format of 01:15:55 . I have an array to store this string object.

What I want is , now I want to display these values by comparing to each other. So I think first I have to convert the string into the NSDate but I am having only time format and do not want to store date.

How can I accomplish this task ? any suggestion ?

EDITED : code

NSInteger secondsSinceStart = (NSInteger)[[NSDate date] timeIntervalSinceDate:sDate]; // sDate = when app get started 

myAppDelegate.seconds = secondsSinceStart % 60;
myAppDelegate.minutes = (secondsSinceStart / 60) % 60;
myAppDelegate.hours = secondsSinceStart / (60 * 60);
NSString *result = nil;

if (myAppDelegate.hours > 0) 
{
    result = [NSString stringWithFormat:@"%02d:%02d:%02d", myAppDelegate.hours, myAppDelegate.minutes, myAppDelegate.seconds];
}
else 
{
    result = [NSString stringWithFormat:@"%02d:%02d", myAppDelegate.minutes, myAppDelegate.seconds];        
}

NSString *tempDateString = [NSString stringWithFormat:@"%d:%d:%d",[myAppDelegate hours],[myAppDelegate minutes],[mogsApp seconds]];

Now I want to convert tempDateString into the NSDate so I can compare with similar objects. Is it possible ?

Thanks...

Ben Zotto Ben Zotto · Accepted Answer · 2011-06-01T06:32:00

Sounds like an NSTimeInterval might be more appropriate. This is just a floating-point value indicating a number of seconds (including fractional seconds). You can manually format a value like this into whatever string format you want with some simple division and remainder math. (NSDate will give you time intervals since a reference date or other dates if you want to use those to get the values.) You can store NSTimeIntervals as strings if necessary.

how to store time in NSDate without date?

2 Answers