您可以使用动画块缓存视图吗

Question

Is there an equivalent way of doing this using animation blocks

[UIView setAnimationTransition:<some_transition> forView:<view> cache:YES];

this seemed to be handy way of not getting staggered animations or to make animations smooth so it doesn't keep redrawing every so often. But i can't seem to figure out how to do this with animation blocks. Maybe i've just missed something somewhere.

Answer 1

Look at the block based methods for transitions: +[UIView transitionFromView:toView:duration:options:completion:] and +[UIView transitionWithView:duration:options:animations:completion:] .

The views are by default cached when you use these block based methods. You turn caching of using the UIViewAnimationOptionAllowAnimatedContent option.

Answer 2

The option only makes sense for transitions. Most animations that you'd use an animation block for couldn't make use of a rasterized cache of just one entire view, because they involve multiple views that move relative to one another and must be composited in every frame of the animation.