How do you make images wobble like on the iPhone home screen?

Question

I have many icons in my app and I would like to animate them in a manner similar to what happens when you try to delete applications from the iPhone\'s home screen. How can you

Answer 1

with blocks (iOS 4+) it would look like:

#define RADIANS(degrees) ((degrees * M_PI) / 180.0)

    CGAffineTransform leftWobble = CGAffineTransformRotate(CGAffineTransformIdentity, RADIANS(-2.0));
    CGAffineTransform rightWobble = CGAffineTransformRotate(CGAffineTransformIdentity, RADIANS(2.0));

    cell.transform = leftWobble;  // starting point
    cell.deleteButton.hidden = NO;

    [UIView animateWithDuration:0.125 delay:0 options:(UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse) animations:^{
        cell.transform = rightWobble;
    }completion:^(BOOL finished){
    }];