How to determine if an NSTimeInterval occurred during an arbitrary NSDate?

Question

I have an NSTimeInterval, and I\'d like to know whether that timestamp falls between the start and end of a date. Basically I need to be able to do something like:

Answer 1

Is it just me or does the OP seem to think that a NSTimeInterval is a representation of an interval in time from A to B? I.e. an absolute distance (in seconds) from Date A to Date B.

The original question needs to be repose to state that you need to find it based on the reference date. Something like this:

NSDate *refDate = someReferenceDate;
NSTimeInterval interval = someInterval;
NSDate *today = [NSDate date];
BOOL isInRange = false;

isInRange = [today isInterval:interval inRangeFromReference:refDate];

Then that method would use some (or parts of all) of the startegies that Damiel, Peter and Marc mention above.