Custom view that sits on top of a UIImageView? Implement -drawRect: and a 
progress property and you're done.


On May 26, 2011, at 11:21 AM, Alex Kac wrote:

> I'm not sure what the best way to tackle this is... so I thought I'd ask 
> here. I have an image with a circular button inside of it. I'd like to 
> dynamically fill this button in an arc to show "progress" much like how when 
> you are on iTunes Store on an iOS and its playing the preview its animating 
> filling the circle in a sweep of an arc. Mine doesn't need to animate however.
> 
> So I have the image, and I suppose I can draw that image to a context and 
> then draw an arc on that image, and then make another image out of it. That 
> seems like it would get slow if I needed to do that a lot. Any suggestions? I 
> also wouldn't mind any links that might show similar code. This is for iOS. I 
> tried searching Google, but my GoogleFu is not showing anything, probably due 
> to me not using the right terms.

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