Double-tap or two single-taps?
<p>What is the time limit for two taps to be considered a double-tap, on the iPhone OS?</p>

<p>// Edit: Why is this important?</p>

<p>In order to handle single-tap and double-tap differently, Apple's guide says to do <code>performSelector...afterDelay</code> with some 'reasonable' interval on first tap (and cancel it later if the second tap is detected).</p>

<p>The problem is that if the interval is too short (0.1), the single tap action will be performed even when double-tapping (if relying only on tapCount, that is). If it's too long (0.8), the user will be waiting unnecessarily for the single-tap to be recognized, when there is no possibility for a double-tap.</p>

<p>It has to be <em>exactly</em> the correct number, in order to work optimally, but definitely not smaller, or there's a chance for bugs (simultaneous single-tap and double-tap).</p>
