pulse animation

- (void)pulseAnimationTo:(UIView *)view duration:(float)duration toValue:(float)toValue repeatCount:(float)repeatCount {
    CABasicAnimation *pulseAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    pulseAnimation.duration = duration;
    pulseAnimation.toValue = [NSNumber numberWithFloat:toValue];
    pulseAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
    pulseAnimation.autoreverses = YES;
    pulseAnimation.repeatCount = repeatCount;
    [view.layer addAnimation:pulseAnimation forKey:nil];
}