Error 24 (Too many open files) - iPhone - iphone

Question

I recently implemented sounds into my game. Every time the user touches the screen, an arrow is shot, and a sound is played. I am using the following code to play the sound:
- (void)arrowShoot {
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:#"%#/arrow.mp3", [[NSBundle mainBundle] resourcePath]]];
arrowShootPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
if (arrowShootPlayer != nil) {
[arrowShootPlayer play];
}
}
The reason I was allocating memory to the arrowShootPlayer every time is because the user can tap the screen rapidly, and I want the sounds to overlap. Otherwise, the sound only plays once the previous one has finished playing.
Anyway, I am getting this error:
<com.apple.main-thread> shm_open failed: "AppleAudioQueue.36.5755" (23) flags=0x2 errno=24
Once I get this error, the sounds stop being played. Everything else is fine, just the arrow sounds stop playing.
Is there a better way of playing 'overlapping' sounds like this on the iPhone, or is there a way around this error??
Thanks

Answer 1

if it is the same audio always, use the playing from memory buffer instead of opening the files. Declare some local buffer:
NSData* data;
then in your method:
if(!data) {
data = [NSData dataWithContentsOfURL:url options:NSDataReadingMappedIfSafe error:&err];
}
arrowShootPlayer = [[AVAudioPlayer alloc] initWithData:data error:nil];
if (arrowShootPlayer) {
[arrowShootPlayer play];
}