Taking a queue from Cocos2d actions, CocosDenshion provides a few classes for fading sounds and music. These are CDLongAudioSourceFader and CDXPropertyModifierAction. In this example, we will see how to fade in/out all sounds, individual sounds, and music. We will also see how to crossfade two music sources.
Execute the following code:
#import "SimpleAudioEngine.h"
#import "CDXPropertyModifierAction.h"
@implementation Ch6_FadingSoundsAndMusic
-(CCLayer*) runRecipe {
//Initialize the audio engine
sae = [SimpleAudioEngine sharedEngine];
//Background music is stopped on resign and resumed on becoming active
[[CDAudioManager sharedManager] setResignBehavior:kAMRBStopPlay autoHandle:YES];
//Initialize source container
soundSources = [[NSMutableDictionary alloc] init];
musicSources = [[NSMutableDictionary alloc] init];
//Add music
[self loadMusic...