Blinking effect on UILabel

Question

I have a UILabel with background color as grey.

I want a blinking effect on this label like it should become a little white & then become gray and it should keep

Answer 1

-(void) startBlinkingLabel:(UILabel *)label 
{
    label.alpha =1.0f;
    [UIView animateWithDuration:0.32
                          delay:0.0
                        options: UIViewAnimationOptionAutoreverse |UIViewAnimationOptionRepeat | UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionAllowUserInteraction |UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         label.alpha = 0.0f;
                     }
                     completion:^(BOOL finished){
                         if (finished) {

                         }
                     }];
}

-(void) stopBlinkingLabel:(UILabel *)label 
{
    // REMOVE ANIMATION
    [label.layer removeAnimationForKey:@"opacity"];
    label.alpha = 1.0f;
}