cocos2d create CCParticlySystemQuad - cocos2d-iphone

Question

This function does nothing, execpt after about 30 seconds the fps begins to go down. I'd like to know what I have to do to display the ccparticle correctly.
Here is my code:
-(void) coccomilk:(CGPoint) p{
CCParticleSystemQuad *milk = [[[CCParticleSystemQuad alloc] initWithTotalParticles:100 ] autorelease];
milk.texture = [[CCTextureCache sharedTextureCache] addImage:#"milk.png"];
milk.emitterMode = kCCParticleModeGravity;
milk.totalParticles = 100;
//milk.particleCount = 100;
milk.life = 0.2f;
milk.lifeVar = 0.1f;
milk.startSize = 32;
milk.startSizeVar = 32;
milk.endSize = 2;
milk.endSizeVar = 0;
milk.angle = 90;
milk.angleVar = 42;
//milk.rotation = 0;
//milk.rotatePerSecond = 0;
//milk.rotatePerSecondVar = 0;
milk.speed = 651;
milk.speedVar= 335.5;
milk.gravity = ccp(0,-2.72);
//milk.blendAdditive = NO;
milk.duration = 0.08;
//milk.blendFunc = (ccBlendFunc) {GL_ONE,GL_DST_ALPHA} ;
milk.emissionRate = milk.particleCount / milk.life;
milk.radialAccel = 0;
milk.radialAccelVar = 0;
milk.tangentialAccel = 0;
milk.tangentialAccelVar = 0;
ccColor4F color = {1.0f,1.0f,1.0f,0.8f};
milk.startColor = color;
milk.startColorVar = (ccColor4F) {0.0f,0.0f,0.0f,0.0f};
milk.endColor = color;
milk.endColorVar = (ccColor4F) {0.0f,0.0f,0.0f,0.0f};
milk.position = ccp(p.x,p.y);
//milk.posVar = 0.0;
milk.sourcePosition = ccp(p.x,p.y);
milk.visible = YES;
[self addChild:milk z:2];
milk.autoRemoveOnFinish = YES;
[milk release];
//[self performSelector:#selector(clearSprite:) withObject:water afterDelay:0.4];
}

Answer 1

There are more mistakes:
There's a wrong emissionRate. You're counting it from the actual number of particles, what's 0 in the time of initialization. Your emissionRate is 0 which means no particles will be emitted. The correct calculation is:
milk.emissionRate = milk.totalParticles / milk.life;
There're too many releases. It will crash on the last release (autoRemoveOnFinish), so remove the last [milk release] from your code. Your particle system will be released after it's life period when it finishes - thats what autoRemoveOnFinish is for - so you don't need to do it manually.

Answer 2

I suggest you to try ParticleDesigner, a lightweight application which allows to graphically design the particles you need and once you are satisfied generate the configuration file cocos2d can manage. http://particledesigner.71squared.com/