iphone interface glow effect question

问题:

I'd like to achieve the glow effect on what I believe are UILabels (or maybe a custom control?) in this application called convert. I think the app looks pretty neat and I'm trying to achieve a similar effect for my own application

Any help?

Best regards
david

alt text http://www.davidhomes.net/convert.png

回答1:

The applicatin seems to have the glow effect only for numbers. That's 10 digits plus a few symbols (".", "+", "-", etc). An easy way to achieve this is to have a different image for each digit and symbol, and create a subclass of UIView that can draw numbers in its drawDect method.

回答2:

In my answer here, I describe a way to apply a glow effect to any text or vector elements drawn within a UIView or CALayer.