How to create a custom SKAction in swift - swift

Question

The idea is that I am creating blocks that are falling out of the sky.
To do this I need an custom action that does four things:
Create an node with my block class
Set the position of that node
add the node to the scene
after an delay go to point one
I am wondering if you actually can create a SKAction.customActionWithDuration to do this things.
Thanks in advance

Answer 1

The following method creates an SKAction that should fit your needs.
func buildAction() -> SKAction {
return SKAction.runBlock {
// 1. Create a node: replace this line to use your Block class
let node = SKShapeNode(circleOfRadius: 100)
// 2. Set the position of that node
node.position = CGPoint(x: 500, y: 300)
// 3. add the node to the scene
self.addChild(node)
// 4. after a delay go to point one
let wait = SKAction.waitForDuration(3)
let move = SKAction.moveTo(CGPoint(x: 500, y: 0), duration: 1)
let sequence = SKAction.sequence([wait, move])
node.runAction(sequence)
}
}

Answer 2

Thanks to #appsYourLife.
I've made a couple of changes below:
I've adjusted for swift 3
I've added a parameter called parent so you can either use buildAction(parent: self) or if you want to attach the node to some otherNode you can use buildAction(parent: otherNode)
func buildAction(parent: SKNode) -> SKAction {
return SKAction.run {
// 1. Create a node: replace this line to use your Block class
let node = SKShapeNode(circleOfRadius: 100)
// 2. Set the position of that node
node.position = CGPoint(x: 500, y: 300)
// 3. add the node to the scene
parent.addChild(node)
// 4. after a delay go to point one
let wait = SKAction.wait(forDuration: 3)
let move = SKAction.move(to: CGPoint(x: 500, y: 0), duration: 1)
let sequence = SKAction.sequence([wait, move])
node.run(sequence)
}
}