'Add scratching sound effect for Scratch Card using UITouch
I want to add a scratching sound effect for a Scratch Card.
I have a scratch sound which goes like 1 scratch/swipe.
I am able to play the scratch sound on touchesMoved and touchesEnded. However, the sound effect doesn't match the user swipe. Like for example if I swipe 1 long swipe, the sound plays multiple times.
I want it to play only once for one continuous swipe.
I want it to play again ONLY if the swipe changes direction or stops moving for a while then swipes again.
Moreover, how can I match the sound effect speed to the swipe speed. Is that possible?
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