Creating multiple identical CCSprites

Question

Is there a clean and efficient way to create an arbitrary number of identical CCSprites?

I really just need a tag to reference them for later removal.

For example in my game I am displaying the number of lives in a HUD:

- (void)displayOneLife
{
    CGPoint positionOne = ccp(90, 450);

    CCSprite *life1 = [CCSprite spriteWithFile:@"life.png"];
    [life1 setPosition:positionOne];
    [life1 setScale:0.5f];
    [self addChild:life1 z:5 tag:1];
}

- (void)displayTwoLives
{
    CGPoint positionOne = ccp(90, 450);
    CGPoint positionTwo = ccp(105, 450);

    CCSprite *life1 = [CCSprite spriteWithFile:@"life.png"];
    CCSprite *life2 = [CCSprite spriteWithFile:@"life.png"];

    [life1 setScale:0.5f];
    [life2 setScale:0.5f];

    [life1 setPosition:positionOne];
    [life2 setPosition:positionTwo];

    [self addChild:life1 z:5 tag:1];
    [self addChild:life2 z:5 tag:2];
}

- (void)displayThreeLives
{
    CGPoint positionOne = ccp(90, 450);
    CGPoint positionTwo = ccp(105, 450);
    CGPoint positionThree = ccp(120, 450);

    CCSprite *life1 = [CCSprite spriteWithFile:@"life.png"];
    CCSprite *life2 = [CCSprite spriteWithFile:@"life.png"];
    CCSprite *life3 = [CCSprite spriteWithFile:@"life.png"];

    [life1 setPosition:positionOne];
    [life2 setPosition:positionTwo];
    [life3 setPosition:positionThree];

    [life1 setScale:0.5f];
    [life2 setScale:0.5f];
    [life3 setScale:0.5f];

    [self addChild:life1 z:5 tag:1];
    [self addChild:life2 z:5 tag:2];
    [self addChild:life3 z:5 tag:3];
}

Answer 1

Actually, the CCSprite constructor looks up in cocos' texture cache, and if the cache already contains the texture, il reuses its texture. So you could simplify further by removing the *texture (which i believe is leaked here), and just use do this:

- (void)displayLifes:(int) nrOfLifes
{
    CGPoint position = ccp(90, 450);    

    for(int i = 1 ; i <= nrOfLifes ; i++)
    {
        CCSprite *life = [CCSprite spriteWithFile:@"life.png"];
        [life setPosition:position];
        [life setScale:0.5f];
        [self addChild:life z:5 tag:i];
         position.x += 15;
    }
}

Answer 2

Create a CCTexture2D using your image and then init all of the sprites using that texture. This way you only load the image once.

Hope this helps.

EDIT:

Also , you can add them dynamically. Like this:

- (void)displayLifes:(int) nrOfLifes
{
    CGPoint position = ccp(90, 450);
    CCTexture2D *texture = [[[CCTexture2D alloc] initWithImage:[UIImage imageNamed:@"life.png"]]autorelease];

    for(int i = 1 ; i <= nrOfLifes ; i++)
    {
         CCSprite *life = [CCSprite spriteWithTexture:texture];
         [life setPosition:position];
         [life setScale:0.5f];
         [self addChild:life z:5 tag:i];

         position.x += 15;
    }
}

Cheers!