How to make a button glow when tapped with showsTouchWhenHighlighted
If you want an easy way to let users know when a UIButton was tapped, try setting its showsTouchWhenHighlighted property to be true. This will render a circular glow effect behind the button when it's tapped, which is particularly effective on text-only buttons.
Here's the code:
btn.showsTouchWhenHighlighted = trueIf you're using Interface Builder, look for and check the "Shows touch when highlighted" option for your button.
Available from iOS 2.0
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