CAEmitterLayer *snowEmitter = [CAEmitterLayer layer]; //例子发射位置 snowEmitter.emitterPosition = CGPointMake(120,20); //发射源的尺寸大小 snowEmitter.emitterSize = CGSizeMake(self.view.bounds.size.width * 20, 20); //发射模式 snowEmitter.emitterMode = kCAEmitterLayerSurface; //发射源的形状 snowEmitter.emitterShape = kCAEmitterLayerLine; //创建雪花类型的粒子 CAEmitterCell *snowflake = [CAEmitterCell emitterCell]; //粒子的名字 snowflake.name = @"snow"; //粒子参数的速度乘数因子 snowflake.birthRate = 1.0; snowflake.lifetime = 120.0; //粒子速度 snowflake.velocity =10.0; //粒子的速度范围 snowflake.velocityRange = 10; //粒子y方向的加速度分量 snowflake.yAcceleration = 2; //周围发射角度 snowflake.emissionRange = 0.5 * M_PI; //子旋转角度范围 snowflake.spinRange = 0.25 * M_PI; snowflake.contents = (id)[[UIImage imageNamed:@"DazFlake"] CGImage]; //设置雪花形状的粒子的颜色 snowflake.color = [[UIColor colorWithRed:0.200 green:0.258 blue:0.543 alpha:1.000] CGColor]; //创建星星形状的粒子 CAEmitterCell *snowflake1 = [CAEmitterCell emitterCell]; //粒子的名字 snowflake1.name = @"snow"; //粒子参数的速度乘数因子 snowflake1.birthRate = 1.0; snowflake1.lifetime = 120.0; //粒子速度 snowflake1.velocity =10.0; //粒子的速度范围 snowflake1.velocityRange = 10; //粒子y方向的加速度分量 snowflake1.yAcceleration = 2; //周围发射角度 snowflake1.emissionRange = 0.5 * M_PI; //子旋转角度范围 snowflake1.spinRange = 0.25 * M_PI; //粒子的内容和内容的颜色 snowflake1.contents = (id)[[UIImage imageNamed:@"DazStarOutline"] CGImage]; snowflake1.color = [[UIColor colorWithRed:0.600 green:0.658 blue:0.743 alpha:1.000] CGColor]; snowEmitter.shadowOpacity = 1.0; snowEmitter.shadowRadius = 0.0; snowEmitter.shadowOffset = CGSizeMake(0.0, 1.0); //粒子边缘的颜色 snowEmitter.shadowColor = [[UIColor redColor] CGColor]; snowEmitter.emitterCells = [NSArray arrayWithObjects:snowflake,snowflake1,nil]; [self.view.layer insertSublayer:snowEmitter atIndex:0]; // Do any additional setup after loading the view
时间： 2024-08-28 02:51:42