Adding multiple sprite nodes to the scene using single function/method in swift - swift

Question

Let's say I have 10 nodes, where all of the nodes are the dots image, which are node1 thru node10. I create node1 as the following:
func createNode1() -> SKNode {
let spriteNode = SKNode()
spriteNode.position = CGPointMake(CGRectGetMidX(self.frame)/1.35, CGRectGetMidY(self.frame)/1.32)
let sprite = SKSpriteNode(imageNamed: "dot_1")
sprite.zPosition = 3.0
sprite.name = "A1_Dot"
spriteNode.addChild(sprite)
return spriteNode
}
I create the rest of nodes by creating 9 more functions, where next one would be as func createNode2etc, all the way up to 10 functions, where the only difference between them is node's name and its location. Basically each node has different location in the scene and of course different image name. Is there a way to load of the 10 nodes to the scene at once and manipulate node's locations at the time of use.? I'm looking for a way to load all 10 nodes to scene using a single function or method and assign node's positions within this same function. Thanks.

Answer 1

You need to use a loop to iterate through an array of positions, and move your code that adds the node to the scene into the loop:
let positions = [CGPointMake(CGRectGetMidX(self.frame)/1.35, CGRectGetMidY(self.frame)/1.32), ... /*add your 9 other positions here*/]
positions.enumerate().forEach { (index, point) in
let spriteNode = SKNode()
spriteNode.position = point
let sprite = SKSpriteNode(imageNamed: "dot_\(index + 1)")
sprite.zPosition = 3.0
sprite.name = "A\(index + 1)_Dot"
spriteNode.addChild(sprite)
// Add spriteNode to the scene here
}

Answer 2

You can either use a loop as Jugale suggested or you could just pass the values you want into the method
For example
func createNode1(imageNamed imageNamed: String, name: String, pos: CGPoint) -> SKNode {
let spriteNode = SKNode()
spriteNode.position = pos
let sprite = SKSpriteNode(imageNamed: imageNamed)
sprite.zPosition = 3.0
sprite.name = name
spriteNode.addChild(sprite)
return spriteNode
}
And now in your scene you can add the nodes like so
let node1Pos = ...
node1 = createNode1(imageNamed: "...", name: "A1_Dot", pos: node1Pos)
let node2Pos = ...
node2 = createNode1(imageNamed: "...", name: "A1_Dot", pos: node2Pos)
I am saying ImageNamed twice in the create Node function because when you pass stuff into functions Swift by default does not require the first description to be typed when calling the method. (see below)
So if would say imageNamed only once than you would call it like so.
node1 = createNode1("...", pos: node1Pos)
Also your creating node function could be simplified, unless you specifically want to return a SKNode in the method.
func createNode1(imageNamed imageNamed: String, name: String, pos: CGPoint) -> SKSpriteNode {
let sprite = SKSpriteNode(imageNamed: imageNamed)
sprite.position = pos
sprite.zPosition = 3.0
sprite.name = name
addChild(sprite)
return sprite
}

Answer 3

Either way is acceptable solution. Here are full details. In baseScene we create function createNodes and call that function in didMoveToView where nodeA1 is given position and added to the scene as shown below.
override func didMoveToView(view: SKView) {
let nodeA1Pos = CGPointMake(CGRectGetMidX(self.frame)/1.5, CGRectGetMidY(self.frame)/2.0)
nodeA1 = createNodes(imageNamed: "dot_1", name: "A1_Dot", pos: nodeA1Pos)
addChild(nodeA1)
}
Then in Level1Scene which is subclass of baseScene we just give a new position to nodeA1 which will override position originally set in baseScene:
override func didMoveToView(view: SKView) {
super.didMoveToView(view)
nodeA1.position = CGPointMake(CGRectGetMidX(self.frame)/1.3, CGRectGetMidY(self.frame)/0.67)
}
This way of subclassing saves a lot of time and code as only one function is used to generate all common sprite nodes.
All thanks to crashoverride777 !!!!