When a uiview renders, it does so to a layer. Calayer caches its bitmap content. So, moving something on screen doesn't require redrawing. Most implicitly anima

When a uiview renders, it does so to a layer. Calayer caches its bitmap content. So, moving something on screen doesn't require redrawing. Most implicitly animated properties (opacity, transforms, etc) won't require a redraw. As mentioned below, it's fairly trivial to save a context to a png file if you must.