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POUITapGestureRecognizer - single tap and double tap
 

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    <p>I am trying to add 2 <code>UITapGestureRecognizers</code> to a view, one for single tap and one for double tap events. The single tap recognizer is working as expected (on its own). But I don't seem to be able to get the double tap recognizer working.</p> <p>Have tried to experiment with properties like : <code>cancelsTouchesInView</code>, <code>delaysTouchesBegan</code> and <code>delaysTouchesEnded</code> but still doesn't work.</p> <p>When I double tap, the single tap recognizer would always be activated and the double tap event would also be sent to the super view. But the custom double tap recognizer does not seem to be notified at all.</p> <p>Documentations seem to suggest that the 3 properties mentioned above could be used for the purpose. But I am just not sure what values should be set and on which recognizer(s) (single, double or both). Hope somebody familiar with this could help.</p> <p>The following is the latest updated code block. </p> <pre><code>// ****** gesture recognizers ****** - (void)addSingleAndDoubleTapGestureRecognizersToView:(UIView *)view { // single tap UITapGestureRecognizer *singleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget: tableViewController action: @selector(handleSingleTapOnView:)]; [singleTapRecognizer setNumberOfTouchesRequired:1]; [view addGestureRecognizer: singleTapRecognizer]; // double tap UITapGestureRecognizer *doubleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget: tableViewController action: @selector (handleDoubleTapOnView:)]; [doubleTapRecognizer setNumberOfTouchesRequired:2]; [singleTapRecognizer requireGestureRecognizerToFail: doubleTapRecognizer]; [view addGestureRecognizer: doubleTapRecognizer]; } - (void)handleSingleTapOnView:(id)sender { } - (void)handleDoubleTapOnView:(id)sender { } </code></pre>
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    1. CORandom comment: underscores in variable names will make most Objective-C programmers cringe. What's worse is that your variable names are not descriptive. Why not just use singleTapRecognizer and doubleTapRecognizer (or something similar)? It takes a split second more to type, but makes your code infinitely more readable.
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    2. COThanks for the advice, agree with you that the variable names should be more descriptive. But this particular code segment has not been finalized and will post more polished and descriptive code as suggested ...
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    3. COFair enough! :)
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