Problem with animating UI image!

Hi all. I would like to animate UI image (sprites)
but I think it is not as easy as Sprite renderer.
-parent
--child image
my sprites have different resolutions. how can I add sprites automatically with exact resolutions?
because my image has the constant size. So I need to change that for every sprites?!
the second problem is when I want to scale up/down its parent,the child image doesn't follow it.
but I can do it easily when I use sprite renderer. it added sprites automatically inside animation with their resolutions and I can scale up/down in different situations.
Do I need to handle that using scripting?
thx

 

I solved it by preserve aspect