CAAnimation trouble

I am planning on using CAAnimation to switch views but I am confused on how to actually do this. I know CAAnimation works by using a to and from Value so how would I move a UIView by using toValue and fromValue. Lets say I want to mimic the UINavigationController's pushVie开发者_Go百科wController, how would I do this using CAAnimation like I mentioned above?

Thanks!!!

If you use the simple animation, you can use the UIView APIs, like beginAnimations:context:

About CAAnimation, you can get the sample from doc reference