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iphoneobjective-cios4nsdatenscalendar

Objective-C midpoint between two times

I have two NSDates formatted as "h:mm a" as time, (i.e. 6:00 AM and 8:00 PM).

I am trying to find out what time is the midpoint between those two times.

For the example above, the midpoint between 6:00 AM and 8:00 PM would be 1:00 PM.

But I do not know how to do this in objective-C for the iPhone sdk.

Any help or suggestions or code would be greatly appreciated.

Solution

  • Perhaps something like the following is what you're after?

    // Assuming you have two NSDate instances: start and end.
NSTimeInterval difference = [end timeIntervalSinceDate:start];
NSDate *middle = [NSDate dateWithTimeInterval:difference / 2 sinceDate:start];

    See the NSDate Class Reference for more information.