cocos2d播放雪花

-(void)playEffectSnow

{

//使用自带下雪粒子

CCParticleSnow *particle = [CCParticleSnow node];

//自定义雪花图片

particle.texture = [[CCTextureCache sharedTextureCache] addImage:@"effect_snow.png"];

//粒子总数

particle.totalParticles = 400;

//下雪时间 秒

particle.duration = 3;

//雪花开始大小

particle.startSize = 40;

//雪花大小浮动

particle.startSizeVar=20;

//雪花结束大小

//particle.endSize = 50;

//particle.endSizeVar = 30;

//初始速度

particle.speed = 20;

particle.speedVar = 15;

//下降速度 y负数表示下落 x负数表示向西吹

particle.gravity = ccp(-20, -70);

//每个雪花生命时间

particle.life = 4.0f;

particle.lifeVar = 2.0f;

//particle.position = ccp(240, 320);

//释放雪花速度

particle.emissionRate = particle.totalParticles/particle.life;

//动画完成后自动从上层layer中移除粒子

particle.autoRemoveOnFinish = YES;

//释放粒子位置

particle.position = (CGPoint) {

[[CCDirector sharedDirector] winSize].width / 2,

[[CCDirector sharedDirector] winSize].height + 10

};

particle.posVar = ccp( [[CCDirector sharedDirector] winSize].width / 2+50, 0 );

//添加到layer中

[gly addChild:particle z:1000];

}

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