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…

Answer 1

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.