iOS How do you start the same thread multiple times

[happybob]

Hi all, hoping I might be able to get some help. I have created a thread in the initialization which plays a very short sound (0.05 sec). I want the sound to be played multiple times whenever the screen is touched through the thread but it only works on the first execution of the thread. I want to avoid the reinitialization due to the fact I need to keep any processor lag to an absolute minimum.

thread = [[NSThread alloc] initWithTarget:self selector:@selector(playAudio) object:nil];

I play the sound as follows

[self.thread start];

Is there something I can add to make sure the thread is retained after being completed without having to reinitialize it?