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2014/10/15 ¤U¤È 10:06:58
iphone Programming Glossary: dispatch_afterDelay the return value instead of whole method http://stackoverflow.com/questions/15128372/delay-the-return-value-instead-of-whole-method void ^ id value returnBlock dispatch_time_t popTime dispatch_time DISPATCH_TIME_NOW 10.f NSEC_PER_SEC delay 10 seconds dispatch_after popTime dispatch_get_main_queue ^ returnBlock @ hello block Usage obj ayncGetValue ^ id value continue share improve..
How can I be notified when a dispatch_async task is complete? http://stackoverflow.com/questions/3379008/how-can-i-be-notified-when-a-dispatch-async-task-is-complete task is complete Or to call a method upon completion I've read through the documentation and have looked into dispatch_after but it seems to be more designed to dispatch the method after a certain length of time. Thanks for the help. iphone objective..
How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:? http://stackoverflow.com/questions/4139219/how-do-you-trigger-a-block-after-a-delay-like-performselectorwithobjectafter objective c objective c blocks grand central dispatch share improve this question I think you're looking for dispatch_after . It requires your block to accept no parameters but you can just let the block capture those variables from your local.. from your local scope instead. int parameter1 12 float parameter2 144.1 Delay execution of my block for 10 seconds. dispatch_after dispatch_time DISPATCH_TIME_NOW 10 NSEC_PER_SEC dispatch_get_main_queue ^ NSLog @ parameter1 d parameter2 f parameter1 parameter2..
Displaying UIAlertView after some time http://stackoverflow.com/questions/4597628/displaying-uialertview-after-some-time nil alert performSelector @selector show withObject nil afterDelay 5 60 alert release EDIT You can now also use GCD's dispatch_after API double delayInSeconds 5 dispatch_time_t popTime dispatch_time DISPATCH_TIME_NOW delayInSeconds NSEC_PER_SEC dispatch_after.. API double delayInSeconds 5 dispatch_time_t popTime dispatch_time DISPATCH_TIME_NOW delayInSeconds NSEC_PER_SEC dispatch_after popTime dispatch_get_main_queue ^ void UIAlertView alertView UIAlertView alloc initWithTitle @ title message @ message..
Asynchronously dispatched recursive blocks http://stackoverflow.com/questions/5394647/asynchronously-dispatched-recursive-blocks myBlock ^ if step STEPS_COUNT return step dispatch_time_t delay dispatch_time DISPATCH_TIME_NOW NSEC_PER_SEC 2 dispatch_after delay dispatch_get_current_queue myBlock dispatch_time_t delay dispatch_time DISPATCH_TIME_NOW NSEC_PER_SEC 2 dispatch_after.. delay dispatch_get_current_queue myBlock dispatch_time_t delay dispatch_time DISPATCH_TIME_NOW NSEC_PER_SEC 2 dispatch_after delay dispatch_get_current_queue myBlock The block is invoked once from outside. When the inner invocation is reached the.. If I use direct invocations everywhere instead of GCD dispatches everything works fine. I've also tried calling dispatch_after with a copy of the block. I don't know if this was a step in the right direction or not but it wasn't enough to make it..
Custom transition between two UIViews http://stackoverflow.com/questions/5511514/custom-transition-between-two-uiviews double delayInSeconds 0.3 dispatch_time_t popTime dispatch_time DISPATCH_TIME_NOW delayInSeconds NSEC_PER_SEC dispatch_after popTime dispatch_get_main_queue ^ void UIView transitionWithView self.view duration 3 options UIViewAnimationOptionTransitionFlipFromRight..
What are the tradeoffs between performSelector:withObject:afterDelay: and dispatch_after http://stackoverflow.com/questions/6205998/what-are-the-tradeoffs-between-performselectorwithobjectafterdelay-and-dispat are the tradeoffs between performSelector withObject afterDelay and dispatch_after The only functional difference I have encountered is that I can cancel the message scheduled with performSelector withObject.. message scheduled with performSelector withObject afterDelay . I don't know of a way to cancel a block submitted to dispatch_after . Please let me know if there is a way to do this that I do not know about . I'd like to know more about functional tradeoffs.. common styles or conventions iphone objective c ios ios4 grand central dispatch share improve this question dispatch_after is part of the new Grand Central Dispatch which is an extension to iOS aimed at improving concurrent code execution on multicore..
How can I fade-out the sound played by MPMusicPlayerController? http://stackoverflow.com/questions/6395375/how-can-i-fade-out-the-sound-played-by-mpmusicplayercontroller code on a block MPMusicPlayerController iPod MPMusicPlayerController iPodMusicPlayer int64_t delay 2LL NSEC_PER_SEC dispatch_after dispatch_time DISPATCH_TIME_NOW delay dispatch_get_current_queue ^ while iPod.volume .1 iPod.volume .1 NSThread sleepForTimeInterval..
Access Method After UIImageView Animation Finish http://stackoverflow.com/questions/9283270/access-method-after-uiimageview-animation-finish self performSelector @selector animationDidFinish withObject nil afterDelay instructions.animationDuration or use dispatch_after dispatch_time_t popTime dispatch_time DISPATCH_TIME_NOW instructions.animationDuration NSEC_PER_SEC dispatch_after popTime..
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