StackOverflow2013

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PO
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15369866
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2013-03-12T19:01:03.690
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2013-03-12T19:06:36.007
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2013-03-12T19:06:36.007
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text
Body
I did this by creating my own control, subclassing UIControl since Apple doesn't recommend screwing with the view hierarchy of UIButton. I add a background imageView representing the standard background image of the button, and a "glowing" imageView above the background to represent the lit-up state, and toggle its opacity to make it pulse. I additionally toggle the layer's shadow opacity to make it glow. Initializing Code: <pre><code>- (void)TS_commonButtonInit { UIImage *shoutoutBackground = [UIImage imageNamed:@"root-navigation-bar-share-button"]; UIImage *shoutoutHighlightedBackground = [UIImage imageNamed:@"root-navigation-bar-share-button-highlighted"]; UIImage *shoutoutPulseImage = [UIImage imageNamed:@"root-navigation-bar-share-button-glowing"]; shoutoutBackground = [shoutoutBackground stretchableImageWithLeftCapWidth:7 topCapHeight:0]; shoutoutHighlightedBackground = [shoutoutHighlightedBackground stretchableImageWithLeftCapWidth:7 topCapHeight:0]; shoutoutPulseImage = [shoutoutPulseImage stretchableImageWithLeftCapWidth:7 topCapHeight:0]; [[self backgroundView] setImage:shoutoutBackground]; [[self backgroundView] setHighlightedImage:shoutoutHighlightedBackground]; [self setGlowingImage:shoutoutPulseImage]; [self setExclusiveTouch:YES]; [self addSubview:[self backgroundView]]; [self addSubview:[self glowingImageView]]; [[self layer] setShadowColor:[[UIColor colorWithHexString:@"ffc521" alpha:1] CGColor]]; [[self layer] setShadowOpacity:0]; [[self layer] setShadowRadius:5]; [[self layer] setShadowOffset:CGSizeMake(0, 0)]; [[self layer] setShadowPath:[[UIBezierPath bezierPathWithRoundedRect:[self bounds] cornerRadius:6] CGPath]]; } </code></pre> Pulsing Code: <pre><code>- (void)pulse:(NSInteger)numberOfTimes { CGFloat pulseLength = .8; [[self glowingImageView] setAlpha:0]; CABasicAnimation *pulseAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"]; [pulseAnimation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; [pulseAnimation setDuration:pulseLength]; [pulseAnimation setRepeatCount:numberOfTimes]; [pulseAnimation setAutoreverses:YES]; [pulseAnimation setFromValue:@(0)]; [pulseAnimation setToValue:@(1)]; [pulseAnimation setRemovedOnCompletion:YES]; [[self layer] setShadowOpacity:0]; CABasicAnimation *shadowAnimation = [CABasicAnimation animationWithKeyPath:@"shadowOpacity"]; [shadowAnimation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; [shadowAnimation setDuration:pulseLength]; [shadowAnimation setRepeatCount:numberOfTimes]; [shadowAnimation setAutoreverses:YES]; [shadowAnimation setFromValue:@(0)]; [shadowAnimation setToValue:@(1)]; [shadowAnimation setRemovedOnCompletion:YES]; [[[self glowingImageView] layer] addAnimation:pulseAnimation forKey:@"opacity"]; [[self layer] addAnimation:shadowAnimation forKey:@"shadowOpacity"]; } </code></pre>
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1. POUIbutton flashing animation
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1. PTAnswer
UserLastEditorUserId
1. USSenior
UserOwnerUserId
1. USSenior
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