Overlaying an animation on top of UIView

What is the best way to overlay an animated gif on top of a UIView? I have an animation of snowfall that I would like t开发者_运维百科o lay on top of a view, yet still retain interaction with the view below.

Can this be accomplished with UIView animation, or would CoreAnimation be better (for compositing the layers).

Thanks again for the help

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One of probably many options would be to set the UIView.backgroundColor = [UIColor clearColor], then place animation objects behind the view, or use a UIButton with a clear bg, etc.