CAEmitterLayer emits random unwanted particles on touch events

Question

I\'m trying to set up a CAEmitterLayer to make a confetti effect, and I\'ve run into two issues:

1. Whenever I set the birthRate on my cell

Answer 1

Could it be that you aren't checking to see if the particle is emitting like in the Wenderlich example Artur Ozieranski posted? I'm not seeing the doubling as long as the check is in place.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [fireView setEmitterPositionFromTouch: [touches anyObject]];
    [fireView setIsEmitting:YES];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    [fireView setIsEmitting:NO];
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    [fireView setIsEmitting:NO];
}
-(void)setIsEmitting:(BOOL)isEmitting
{
    //turn on/off the emitting of particles
    [fireEmitter setValue:[NSNumber numberWithInt:isEmitting?200:0] forKeyPath:@"emitterCells.fire.birthRate"];
}