Apple Game Frameworks and Technologies

Chain Actions Together to Create a Sequence

Using a single action in SpriteKit is powerful, but even more powerful are actions that you chain together. When you chain actions together, you can create a complex system of actions that you can run either as a group or a sequence. You can also set up your actions to repeat forever or for a set number of times, as you saw earlier in ​Animate the Player with Actions​.

To make the collectible drops fall from the sky, you’ll use several actions chained together, creating a single sequence of actions. You’ll build this sequence of actions in a new drop(dropSpeed:floorLevel) method.

Open the Collectible.swift file. Below the initialization methods, add the following code:

// MARK: - FUNCTIONS
func ...