On Jul 22, 2012, at 9:24 PM, Jens Alfke wrote:
> On Jul 22, 2012, at 6:43 PM, Jay Reynolds Freeman
> <jay_reynolds_free...@mac.com> wrote:
>
>> Since my app has nothing to do while waiting for the sound to play, a
>> polling loop on "isPlaying" is actually a good deal less code (only two
>> lines) than setting up a delegate with "-sound:didFinishPlaying" implemented.
>
> It may be less code, but it's bad practice. It locks up the thread,
> preventing the runloop from performing other activities, and it consumes a
> lot of CPU unless you put in a sleep call.
>
> If you really have to block, use a loop that spins the runloop, like this:
>
> while (!readyToStop()) {
> if (![[NSRunLoop currentRunLoop] runMode: someCustomRunLoopMode
> beforeDate: [NSDate distantFuture]])
> break;
> }
Note that this case is not one where you “really have to block.” Don’t use the
code above; just use the handy delegate method that Apple’s engineers were
thoughtful enough to provide for you. The difference in the length of code is
minimal.
Charles
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