Le 22 août 2013 à 15:36, Torsten Curdt <tcu...@vafer.org> a écrit :

> I have some piece of code that I want to run every x seconds ....but I
> also want to be able to trigger a "run now" that will reset the
> upcoming cycle.
> 
> I think I would know plenty of ways to implement this (ranging from
> simple NSTimer to select() style signaling to threading with
> conditions) but I am looking for the most elegant way - preferably
> with GCD.
> 
> Scheduling a block is easy with GCD - but can you also notify that
> block for immediate execution later on?
> 
> Just would love to hear opinions on how you would tackle this
> admittedly easy problem the most elegant way.


Why not just keeping a reference on your scheduled block and simply call 
dispatch_async when you want to execute it immediately ?

-- Jean-Daniel





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