It's time to create all the callback functions, so let's expand the content of the game class declaration:
var game = cc.Layer.extend({
init:function () {
// same as before
},
playSound:function(){
this.audioEngine.playEffect("assets/bang.mp3");
},
playBGMusic:function(){
if(!this.audioEngine.isMusicPlaying()){
this.audioEngine.playMusic("assets/loop.mp3",true);
}
},
stopBGMusic:function(){
if(this.audioEngine.isMusicPlaying()){
this.audioEngine.stopMusic();
}
},
musicUp:function(){
this.audioEngine.setMusicVolume(this.audioEngine.getMusicVolume()+0.1);
},
musicDown:function(){
this.audioEngine.setMusicVolume(this.audioEngine.getMusicVolume()-0.1);
},
effectsUp:function(){
this.audioEngine.setEffectsVolume(this.audioEngine.getEffectsVolume()+0.1);
},
effectsDown:function(){
this.audioEngine.setEffectsVolume(this.audioEngine.getEffectsVolume()-0.1);
}
});