Adding glow effect to UIButton - iOS

Question

I have an UIButton which is a logo. This logo button will glow on forever but will stop glowing on touch.It is like a glowing animation.

Is there any suggestions?

Answer 1

Here is my answer....

Using categories

/* ****FAQ?

 1.how to add glow effect on uibutton?
 [UIButton glowUIButton:playButton];

 2.how to remove effect on uibutton?
 [UIButton removeGlowUIButton:playButton];

 Ends*** */

#import 
@interface UIButton (BlinkEffect)
//blink effect category
+( void) glowUIButton:(UIButton *)inputButton;
//remove blink effect
+(void) removeGlowUIButton:(UIButton *)inputButton;
@end

#import "UIButton+BlinkEffect.h"

@implementation UIButton (BlinkEffect)

+(void) glowUIButton:(UIButton *)inputButton
{
    //add blink effect
    CALayer *viewLayer = inputButton.layer;
    viewLayer.shadowOffset = CGSizeMake(0,0);
    CGFloat radius = CGRectGetWidth(inputButton.bounds)/2.0;
    viewLayer.shadowColor = [[UIColor whiteColor] CGColor];
    viewLayer.shadowPath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(-7,-5.5, 2.5 * (radius), 2.5 * radius) cornerRadius:radius].CGPath;
    viewLayer.shadowRadius = 5.0f;
    viewLayer.shadowOpacity = 1.0f;

    //Let's animate it while we're at it.
    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"shadowOpacity"];
    animation.duration =0.7;
    animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
    animation.fromValue = [NSNumber numberWithFloat:1.0];
    animation.toValue = [NSNumber numberWithFloat:0.0];
    animation.autoreverses = YES;
    animation.repeatCount = 1.0 / 0.0;
    [viewLayer addAnimation:animation forKey:@"shadowOpacity"];

}

+(void)removeGlowUIButton:(UIButton *)inputButton
{
    CALayer *viewLayer = inputButton.layer;
    viewLayer.shadowColor = [[UIColor clearColor] CGColor];
    [viewLayer removeAnimationForKey:@"shadowOpacity"];
}
@end