Currently my particles appear on screen abruptly in their full shape and form. What I want is for the cells to either start at 0.0 opacity and animate up to full opacity, or start at 0.0 scale and animate up to 1.0 scale. I can't find anything online on how to do this.
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1I'd like to know this as well so I'm gonna put up a bounty on it. – Ben Kreeger Jun 03 '15 at 14:34
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did you try to use CADisplayLink? – Mert Buran Jun 10 '15 at 12:53
1 Answers
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You can animate the various properties of a CAEmitterCell, there is a good example at animating the CAEmitterCell Color property that should give you a good idea of what you should do to get the effect you want.
There are lots of great resources on CAEmitters, one good one is Tutorial: Particle Systems in Core Animation with CAEmitterLayer and another is Apple's Fireworks Sample Code
