Animation completion will not work under some circumstances about easyanimation HOT 4 CLOSED

func transformToTouching() { //Response to touching event

    self.setHighlighted(true, animated: true)

    self.animationQueue.removeAll(keepCapacity: true)

    EAAnimationDelayed.animations.map {

        $0.cancelAnimationChain()
    }

    self.spriteLayer.removeAllAnimations()

    self.chainAnimation({ () -> Void in

        self.spriteLayer.fillColor = ...
        self.spriteLayer.path = ...

    }, duration: 0.3)
}

typealias AnimationBlock = () -> Void
typealias AnimationPiece = (animation:AnimationBlock, duration: NSTimeInterval)

var animating:Bool = false
var animationQueue = [AnimationPiece]()

func chainAnimation(animation: AnimationBlock, duration: NSTimeInterval) {

    self.animationQueue.append((animation:animation, duration: duration))

    self.feedAnimation()
}

func feedAnimation() {

    if self.animating {

        return
    }

    if let some = self.animationQueue.first {

        self.animationQueue.removeAtIndex(0)

        self.animating = true

        UIView.animateWithDuration(some.duration, delay: 0.0, options: UIViewAnimationOptions.CurveEaseInOut, animations: some.animation, completion: { (done: Bool) -> Void in // Not work while too fast

            self.animating = false

            self.feedAnimation()
        })

    } else {

        return
    } //
}

EAAnimationDelayed.animations.map {

        $0.cancelAnimationChain()
}