![]() You get animation on demand.Īsking for an animation can be as simple as setting a property value under some circumstances, a single line of code will result in animation: myLayer.backgroundColor =. You don’t perform an animation yourself you describe it, you order it, and it is performed for you. ![]() There are just too many complications - complications of calculation, of timing, of screen refresh, of threading, and many more. ![]() Without help, most of us would find animation beyond our reach. Or a view might change from opaque to transparent, not instantly, but perceptibly fading away. For example, a view’s background color might change from red to green, not instantly, but perceptibly fading from one to the other. But other kinds of attribute can animate as well. The changing attribute might be positional: something moves or changes size. ![]() Animation is the visible change of an attribute over time. ![]()
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