iPhone App - WAV sound files don't play

Question

I searched on here and tried out all the different solutions given, but nothing worked. So let me ask:

I'm trying to play a sound on an iPhone app when a button is pressed. I imported the Audio framework, hooked up the button with the method, have the WAV sound file in the bundle, and use the following code to play the sound:

    NSString *path = [NSString stringWithFormat:@"%@%@", [[NSBundle mainBundle] resourcePath], @"/filename.wav"];
SystemSoundID soundID;
NSURL *filePath = [NSURL fileURLWithPath:path isDirectory:NO];
AudioServicesCreateSystemSoundID((CFURLRef)filePath, &soundID);
AudioServicesPlaySystemSound(soundID);

But it doesn't play sound when I press a button. (Yes, my sound is on.)

Any ideas why this might be, and how I can fix it? I'd be happy to provide any more information if it helps.

Answer 1

First of all, the preferred sound format for iPhone is LE formatted CAF, or mp3 for music. You can convert a wav to caf with the built in terminal utility:

afconvert -f caff -d LEI16 crash.wav crash.caf

Then the easiest away to play a sound is to use the AVAudioPlayer... this quick function can help you load a sound resource:

- (AVAudioPlayer *) soundNamed:(NSString *)name {
    NSString * path;
    AVAudioPlayer * snd;
    NSError * err;

    path = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:name];

    if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
        NSURL * url = [NSURL fileURLWithPath:path];
        snd = [[[AVAudioPlayer alloc] initWithContentsOfURL:url 
                                                      error:&err] autorelease];
        if (! snd) {
            NSLog(@"Sound named '%@' had error %@", name, [err localizedDescription]);
        } else {
            [snd prepareToPlay];
        }
    } else {
        NSLog(@"Sound file '%@' doesn't exist at '%@'", name, path);
    }

    return snd;
}