Q:

Circular animation to make UIImageView appear

I have a "circular" image, something like a pie chart.  I would like a nice appearing animation, like when a pie chart fills itself from 0 to the value. 
I usually use something like this when I want to animate views :
[UIView animateWithDuration: 3.0 
                      delay: 0.0 
                    options: UIViewAnimationCurveEaseInOut 
                 animations: ^ {
                             // The animation
                     } 
                 completion: ^(BOOL finished) {
                             // On completion
                     } ];

Is it possible to do the same thing for a circular animation ?  I really have no idea on how to do that. 
Thanks for any leads ! 
Note : iOS 5, storyboards, ARC, and all that stuff :)

Edit : for future discussion, the image looks like this :

A:

Okay, here it goes :)
First option (Easy one).  You could use UIImageView's animationImages property.  Make NSArray with animation images (in your case, circular images those fill from 0 to full circle), set animationDuration, and call [imageView startAnimating] (I'm assuming that your UIImageView is imageView), and you can call [imageView stopAnimating] when process is done. 
Second:
Check out this link http://www.cocoacontrols.com/platforms/ios/controls/jpradialactivityindicator, I think that sample project does the almost same, as you are trying to do :)
Good Luck ;)

