Understanding UIScrollView

Question

Hi,

I'm trying to understand how UIScrollView works for zooming.

I was trying to rotate a UIImageView within a zoomed UIScrollView and I ended up with weird sizes, my centering in the scrollview not working anymore.

I solved the problem by setting the zoomScale to 1.0 before doing the rotation, and then by resetting it back to the previous value once the transformation was done.

I was wondering what was the impact of the UIScrollView on its subviews. Does it change their sizes, their positions. Or is it simply the UIScrollView that handles the zooming and the drawing of the zoomed subviews.