As we noted at the beginning of this chapter, the great thing about using CALayer and its subclasses is that most of the properties are pre-configured for animation. How simple or how complex those animations are is entirely up to us, but it makes the implementation very easy.
In this section, we will start with some one-liner animation code and work our way up to some pretty intense 3D animations that will consist of a page of code each. But by using CALayer objects to compose our slightly sci-fi inspired UI, we have completed much of the work that is needed to get Core Animation to do what it says on the box, namely animation.
