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Home/ Questions/Q 865719
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Editorial Team
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Editorial Team
Asked: May 15, 20262026-05-15T09:40:58+00:00 2026-05-15T09:40:58+00:00

having trouble with this. i need to come up with a logic code. How

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having trouble with this. i need to come up with a logic code.

How do i, given 2 set of times. subtract one from the other and change it all to seconds.

Lets say i have ’12:00:00′ and ’15:00:00′
Now i want to subtract 12:00:00 from 15:00:00 so the result will be 03:00:00. Then change it all to seconds so that will be 10800 seconds

i already have two sets of time in an NSString after being Formatted with a NSDateFormatter

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  1. Editorial Team
    Editorial Team
    2026-05-15T09:40:58+00:00Added an answer on May 15, 2026 at 9:40 am

    This is what you need to look for : NSDate -(NSTimeInterval)timeIntervalSinceDate

    Convert your string to an NSDate and call this method [thisDate timeIntervalSinceDate:thatDate] will return you an NSTimeInterval, type double

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