little black activity window
I've seen in quite a few apps a small black square with rounded corners that pops up with a spinning activity indicator in the middle and a label that says what the app is busy doing. For example in the contacts app when you edit a photo by taking a new picture, this window will pop up and say saving photo with a spinner in the middle. I've seen this same thing in so many different apps both Apple and third party, that I figure it has to be a class or control in the UIKit framework, but I can't find one. Does anyone know how I can use one of these? Is there a class for it, or do I have to build it myself?
thanks.
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