How to unload images in Cocos2d - objective-c

Question

I am working with cocos2d. At the first Default.png load as first splash, then splash1.png load as second splash. I see in Instruments, that memory don't free when I replace scene. How can I unload images from memory? Thanks!
#import "cocos2d.h"
#import "MainMenu.h"
#interface Splash : CCLayer {
NSMutableArray *m_pSplashes;
int m_nCurrentSplash;
CGSize m_szWinSize;
CCSequence *m_pSequence, *m_pSequenceDefault;
CCCallFunc *m_pCall;
CCSprite *m_pSplashDefault, *splash;
id m_pFadein, m_pDelay, m_pFadeout;
}
#property(nonatomic, retain) CCSequence *m_pSequence;
+(id) scene;
-(void) showNext: (id) sender;
#end
Implementation file
#import "Splash.h"
#implementation Splash
#synthesize m_pSequence;
+(id) scene {
CCScene *scene = [CCScene node];
Splash *layer = [Splash node];
[scene addChild: layer];
return scene;
}
-(id) init {
if( (self=[super init]) ) {
m_szWinSize = [[CCDirector sharedDirector] winSize];
m_pFadein = [CCFadeIn actionWithDuration:2];
m_pDelay = [CCDelayTime actionWithDuration:2];
m_pFadeout = [CCFadeOut actionWithDuration:2];
m_pCall = [CCCallFunc actionWithTarget:self selector:#selector(showNext:)];
m_nCurrentSplash = 0;
m_pSplashes = [[NSMutableArray alloc] init];
m_pSequenceDefault = [CCSequence actions:m_pFadeout, m_pCall, nil];
[m_pSplashes addObject:#"splash1.png"];
m_pSplashDefault = [[[CCSprite alloc] initWithFile:#"Default.png"] autorelease];
[m_pSplashDefault setRotation:-90];
[m_pSplashDefault setPosition:ccp(m_szWinSize.width/2, m_szWinSize.height/2)];
[self addChild:m_pSplashDefault];
[m_pSplashDefault runAction:m_pSequenceDefault];
[m_pFadein retain];
[m_pDelay retain];
[m_pFadeout retain];
[m_pCall retain];
}
return self;
}
-(void) showNext: (id) sender {
if ( m_nCurrentSplash >= [m_pSplashes count] )
{
CCScene *scene = [CCScene node];
id child = [MainMenu node];
[scene addChild:child];
[[CCDirector sharedDirector] replaceScene: [CCFadeTransition transitionWithDuration:1 scene:scene]];
[m_pCall release];
}
else
{
splash = [[[CCSprite alloc] initWithFile:[m_pSplashes objectAtIndex:m_nCurrentSplash]] autorelease];
[splash setPosition:ccp(m_szWinSize.width/2, m_szWinSize.height/2)];
splash.tag = 1;
[self addChild:splash];
m_nCurrentSplash ++;
m_pSequence = [CCSequence actions:m_pFadein, m_pDelay, m_pFadeout, m_pCall, nil];
[splash runAction:m_pSequence];
}
}
-(void) dealloc {
NSLog ( #"dealloc" );
[m_pSplashes release];
[m_pFadein release];
[m_pDelay release];
[m_pFadeout release];
[self removeAllChildrenWithCleanup:YES];
[super dealloc];
}
#end

Answer 1

Either you manually handle by using
[[CCTextureCache sharedTextureCache]removeTexture:(CCTexture2D *)tex]
or:
[[CCTextureCache sharedTextureCache] removeUnusedTextures];
if you are sure the texture is no longer being use.