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2014/10/15 ¤U¤È 10:04:53
iphone Programming Glossary: cancelpreviousperformrequestswithtargetHow to Check if Parallax is enabled http://stackoverflow.com/questions/20361033/how-to-check-if-parallax-is-enabled UIMotionEffectGroup _effectGroup void didMoveToSuperview cancel any detection loop we may have ongoing NSObject cancelPreviousPerformRequestsWithTarget self if anything still in doubt and we're on a view then start the detection loop if self.parallaxHasOccurred self.superview..
Implementing iphone's copy/paste controls on a custom view / uiview subclass http://stackoverflow.com/questions/2110731/implementing-iphones-copy-paste-controls-on-a-custom-view-uiview-subclass @selector showCopyMenu withObject nil afterDelay 0.8f void touchesEnded NSSet touches withEvent UIEvent event NSObject cancelPreviousPerformRequestsWithTarget self selector @selector showCopyMenu object nil void touchesCancelled NSSet touches withEvent UIEvent event NSObject cancelPreviousPerformRequestsWithTarget.. self selector @selector showCopyMenu object nil void touchesCancelled NSSet touches withEvent UIEvent event NSObject cancelPreviousPerformRequestsWithTarget self selector @selector showCopyMenu object nil void touchesMoved NSSet touches withEvent UIEvent event NSObject cancelPreviousPerformRequestsWithTarget.. self selector @selector showCopyMenu object nil void touchesMoved NSSet touches withEvent UIEvent event NSObject cancelPreviousPerformRequestsWithTarget self selector @selector showCopyMenu object nil @end So what else does one have to do to make this happen For those following..
iphone - double tap fail safe way http://stackoverflow.com/questions/2637229/iphone-double-tap-fail-safe-way the message if a new touch occurs during timeout void touchesBegan NSSet touches withEvent UIEvent event NSObject cancelPreviousPerformRequestsWithTarget self selector @selector handleSingleTap object nil see also http developer.apple.com iphone library documentation WindowsViews..
NSOperations or NSThread for bursts of smaller tasks that continuously cancel each other? http://stackoverflow.com/questions/2840406/nsoperations-or-nsthread-for-bursts-of-smaller-tasks-that-continuously-cancel-ea of simplicity and abstraction. Is called after each keystroke void searchFieldChanged UITextField textField NSObject cancelPreviousPerformRequestsWithTarget self NSString searchString textField.text if searchString length 0 self performSelector @selector doSearch withObject textField.text..
performSelector:withObject:afterDelay: not working from scrollViewDidZoom http://stackoverflow.com/questions/2865760/performselectorwithobjectafterdelay-not-working-from-scrollviewdidzoom gesture finishes. This is what I have void scrollViewDidZoom UIScrollView scrollView NSLog @ resetting timer NSObject cancelPreviousPerformRequestsWithTarget self selector @selector positionLock object nil self performSelector @selector positionLock withObject nil afterDelay 0.4.. UIScrollView scrollView withView UIView view atScale float scale NSLog @ deleting timer NSObject cancelPreviousPerformRequestsWithTarget self selector @selector positionLock object nil This is the output 2010 05 19 22 43 01.931 resetting timer 2010 05 19 22..
iPhone how to cancel stop performSelector http://stackoverflow.com/questions/3649273/iphone-how-to-cancel-stop-performselector
How to detect a pause in input for UISearchBar/UITextField? http://stackoverflow.com/questions/7061377/how-to-detect-a-pause-in-input-for-uisearchbar-uitextfield It doesn't have to use NSTimer. void searchBar UISearchBar searchBar textDidChange NSString searchText NSObject cancelPreviousPerformRequestsWithTarget self selector @selector request object nil ..... self performSelector @selector request withObject nil afterDelay yourpausetime..
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