ParticleFun

fun.m

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIView *holderView = [[UIView alloc] initWithFrame:CGRectMake(50.0f, 50.0f, 200.0f, 200.0f)];
    
    CAEmitterLayer *emitterLayer = [CAEmitterLayer layer];
    emitterLayer.frame = CGRectMake(0.0f, 0.0f, 200.0f, 200.0f);
    emitterLayer.emitterSize = CGSizeMake(20.0f, 20.0f);
    emitterLayer.emitterPosition = CGPointMake(90.0f, 90.0f);
    
    NSMutableArray *cells = [NSMutableArray array];
    
    CAEmitterCell *cell = [CAEmitterCell emitterCell];
	cell.contents = (id)[UIImage imageNamed:@"F2.png"].CGImage;
    cell.color = [UIColor orangeColor].CGColor;
    cell.alphaRange = 50;
    cell.alphaSpeed = 5;
	cell.birthRate = 50;
	cell.velocity = 75;
    cell.velocityRange = 3;
	cell.lifetime = 1;
    cell.lifetimeRange = .75;
    cell.scale = 1.0;
    cell.scaleRange = 1;
    cell.spin = M_PI_2;
    cell.spinRange = M_PI * 2;
    cell.emissionLongitude = -M_PI_2;
    cell.emissionRange = M_PI/8;
    [cell setName:@"cell"];
    [cells addObject:cell];
    
    cell = [CAEmitterCell emitterCell];
	cell.contents = (id)[UIImage imageNamed:@"F2.png"].CGImage;
    cell.color = [UIColor orangeColor].CGColor;
    cell.alphaRange = 80;
    cell.alphaSpeed = 5;
	cell.birthRate = 300;
	cell.velocity = 50;
    cell.velocityRange = 25;
	cell.lifetime = 1;
    cell.lifetimeRange = .8;
    cell.scale = 1.0;
    cell.scaleRange = 1 ;
    cell.spin = M_PI_2;
    cell.spinRange = M_PI * 2;
    cell.emissionLongitude = -M_PI_2;
    cell.emissionRange = M_PI/4;
    [cell setName:@"cell2"];
    [cells addObject:cell];
    
    CAEmitterCell *cellCell = [CAEmitterCell emitterCell];
	cellCell.contents = (id)[UIImage imageNamed:@"F2.png"].CGImage;
    cellCell.color = [UIColor darkGrayColor].CGColor;
    cellCell.alphaRange = 80;
    cellCell.alphaSpeed = 5;
	cellCell.birthRate = 1;
	cellCell.velocity = 30;
    cellCell.velocityRange = 10;
	cellCell.lifetime = 3;
    cellCell.lifetimeRange = 2;
    cellCell.scale = .5;
    cellCell.emissionLongitude = M_PI_2-M_PI_4;
    [cellCell setName:@"cellCell"];
    cell.emitterCells = @[ cellCell ];
    
    emitterLayer.emitterCells = cells;
    emitterLayer.renderMode = kCAEmitterLayerAdditive;
    
    [holderView.layer addSublayer:emitterLayer];
    [self.view addSubview:holderView];
}