An object that is run by a node to change its structure or content.
- iOS 7.0+
- macOS 10.9+
- tvOS 9.0+
- watchOS 3.0+
SKAction is an animation that is executed by a node in the scene. Actions are used to change a node in some way (like move its position over time), but you can also use actions to change the scene, like doing a fadeout. When the scene processes its nodes, the actions associated with those nodes are processed.