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    <p>For a six second long press, use a <a href="http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UILongPressGestureRecognizer_Class/Reference/Reference.html%23//apple_ref/occ/cl/UILongPressGestureRecognizer" rel="nofollow noreferrer"><code>UILongPressGestureRecognizer</code></a> with its <code>minimumPressDuration</code> property set to 6. </p> <p>Write your own <a href="https://developer.apple.com/library/ios/documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/GestureRecognizer_basics/GestureRecognizer_basics.html" rel="nofollow noreferrer">gesture recognizer</a> (say, <code>LongTappingGestureRecognizer</code>) for continuous tapping for a given period; it shouldn't be too tricky. Give it a property like <code>UILongPressGestureRecognizer</code>'s <code>minimumPressDuration</code> (say, <code>minimumTappingDuration</code>) and a property (say, <code>maximumLiftTime</code>) that determines how long a finger can be lifted off before it's not considered to be a long tapping gesture.</p> <ul> <li>When it first receives <a href="http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIGestureRecognizer_Class/Reference/Reference.html%23//apple_ref/occ/cl/UIGestureRecognizer" rel="nofollow noreferrer"><code>touchesBegan:withEvent:</code></a>, record the time.</li> <li>When it receives <a href="http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIGestureRecognizer_Class/Reference/Reference.html%23//apple_ref/occ/cl/UIGestureRecognizer" rel="nofollow noreferrer"><code>touchesEnded:withEvent:</code></a>, start an <a href="http://developer.apple.com/library/ios/#documentation/cocoa/reference/foundation/Classes/NSTimer_Class/Reference/NSTimer.html" rel="nofollow noreferrer"><code>NSTimer</code></a> (the lift timer) that sends the gesture recognizer a cancel message (e.g. <code>cancelRecognition</code>) after <code>maximumLiftTime</code>. </li> <li>When it receives <code>touchesBegan:withEvent:</code> when there's a start time, cancel the lift timer (if any). </li> <li>The <code>cancelRecognition</code> will transition to the <a href="http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIGestureRecognizer_Class/Reference/Reference.html%23//apple_ref/c/econst/UIGestureRecognizerStateFailed" rel="nofollow noreferrer">failed state</a>.</li> </ul> <p>There are various strategies for handling recognizing when the end of the gesture is reached, after <code>minimumTappingDuration</code>. One is to check in both the <code>touchesBegan:withEvent:</code> and <code>touchesEnded:withEvent:</code> handlers if the difference between the current time and the start time is >= <code>minimumTappingDuration</code>. The problem with this is that it will take longer than <code>minimumTappingDuration</code> to recognize the gesture if the user is tapping slowly and hir finger is down when the <code>minimumTappingDuration</code> is reached. Another approach is to start another NSTimer (the recognition timer) when the first <code>touchesBegan:withEvent:</code> is received, one that will cause transition to the <a href="http://developer.apple.com/library/ios/#documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/GestureRecognizers/GestureRecognizers.html" rel="nofollow noreferrer">recognized state</a> and that is cancelled in <code>cancelRecognition</code>. The tricky thing here is what to do if the finger is lifted when the timer fires. The best approach might be a combination of the two, ignoring the recognition timer if the finger is lifted.</p> <p>There's more to the details, but that's the gist. Basically, it's a long press recognizer that lets the user lift hir finger off the screen for brief periods. You could potentially use just the tapping recognizer and skip the long press recognizer.</p>
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