How to play audio at launch image in Cocos2D v3.x iOS?

Question

I'm making a game in Cocos2D iOS and would like play a short audio clip (in .m4a format) when the launch image (Default) is displayed.

I tried adding this line: [[OALSimpleAudio sharedInstance] playBg:@"clip.m4a"];

in application didFinishLaunchingWithOptions but doesn't work.

I also tried playing a .caf file instead of .m4a, but it also doesn't play.

Can you guys please help me in this regard?

Thanks a lot!

Answer 1

Are you talking about the default loading screen that is defined in your project settings as 'default.png'? If yes, I don't think it's possible to play a sound at the same moment the app is launched, because it is currently loading it. What you could do however is a IntroScene that would only implement the onEnter method and immediately apply a transition to, example, your Main Menu. This is what I am doing right now in my game (using cocos2D 2.1, but I guess this isn't very different from a version to another) :

-(void) onEnter
{
    [super onEnter];

    CCScene *scene;

    //Check if app has already launched once
    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"HasLaunchedOnce"]) {
        scene = [MainMenuScene sceneWithParticles:nil];
    }else{
        scene = [Tutorial sceneWithParticle:nil];
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"HasLaunchedOnce"];
        [[NSUserDefaults standardUserDefaults] synchronize];
    }

    //PLAY YOUR SOUND HERE

    //Transition
    [[CCDirector sharedDirector] replaceScene:[CCTransitionFade transitionWithDuration:1.0 scene:scene]];
}

Hope this helps! :)