Help needed in a calendar based app
<p>I am creating a calendar based app.</p>

<p>I have two dates say present date, and future date(due date), now i need to show the difference between these two dates in terms of days, hours, minutes &amp; seconds and i want to show a timer which will continues to decrement second by second as the time increases and ultimately reaches to zero when due date comes.Basically it will be showing that how much days, hrs and seconds are left for the event.</p>

<p>How can I do that, please help me.</p>

<p>It would be a great help if i can get a similar kind of sample code.</p>

<p>Many Thanks in advance.
iPhone Developer</p>
