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

Glowing code taken from: Creating a Glow Effect for UILabel and UIButton

First, you'll need to import the QuartzCore Framework:

#import 

When you create a button (or in viewDidLoad, depends on your code structure) add this code:

UIColor *color = button.currentTitleColor;
button.titleLabel.layer.shadowColor = [color CGColor];
button.titleLabel.layer.shadowRadius = 4.0f;
button.titleLabel.layer.shadowOpacity = .9;
button.titleLabel.layer.shadowOffset = CGSizeZero;
button.titleLabel.layer.masksToBounds = NO;

You'll need to watch for two events: UIControlEventTouchDown and UIControlEventTouchUpInside

In UIControlEventTouchDown handler you'll add the code:

UIColor *color = [UIColor clearColor];
button.titleLabel.layer.shadowColor = [color CGColor];

And in UIControlEventUpInside handler you'll add the code:

UIColor *color = button.currentTitleColor;
button.titleLabel.layer.shadowColor = [color CGColor];

Again details of implementation depend on whether you create button programmaticaly or via Interface Builder but i'm sure you'll be able to figure this out from here on.

EDIT: for a custom button simply adding the following code should work:

[button setImage:[UIImage imageNamed:@"buttonWithGlow.png"]
        forState:UIControlStateNormal];
[button setImage:[UIImage imageNamed:@"buttonWithNoGlow.png"] 
        forState:UIControlStateHighlighted];