spritekit make childnode not touchable - sprite-kit

Question

I have a menu button (skSpriteNode) and a small play icon inside this sprite
mainButton.addChild (playIcon)
mainButton.name = "xyz"
addchild (mainButton)
ok, I gave the button the name to check if a sprite with this name is touched.
when I touch the icon child inside the button, the touchedNode.name is nil. I set isUserInteractionEnabled = false for the icon child. I want to pass the touch to the parent. how can I do this.
for touch in touches {
let location = touch.location(in: self)
let touchedNode = self.atPoint(location)
if (touchedNode.name != nil) {
print ("node \(touchedNode.name!)")
} else {
continue
}
}

Answer 1

You have to implement touchesBegan in a subclass of SKSpriteNode and to set its isUserInteractionEnabled = true, in order to accept and process the touches for that particular node (button).
import SpriteKit
protocol ButtonDelegate:class {
func printButtonsName(name:String?)
}
class Button : SKSpriteNode{
weak var delegate:ButtonDelegate?
init(name:String){
super.init(texture: nil, color: .purple, size: CGSize(width: 250, height: 250))
self.name = name
self.isUserInteractionEnabled = true
let icon = SKSpriteNode(color: .white, size: CGSize(width:100, height:100))
addChild(icon)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
delegate?.printButtonsName(name: self.name)
}
}
class GameScene: SKScene, ButtonDelegate {
override func didMove(to view: SKView) {
let button = Button(name:"xyz")
button.delegate = self
button.position = CGPoint(x: frame.midX - 50.0, y: frame.midY)
addChild(button)
}
func printButtonsName(name: String?) {
if let buttonName = name {
print("Pressed button : \(buttonName) ")
}
}
}
Now, this button will swallow the touches and the icon sprite will be ignored.
I just modified the code from one of my answers to make an example specific to your needs, but you can read, in that link, about whole thing more in detail if interested.

Answer 2

I implemented the button Touchbegan and tried to implement a subclass for a slider with a background and the child thumb inside the slider. I added the sliderDelegate Protocoll in my GameScene. the down touch is ok, but I didn't get the moved in
import Foundation
import SpriteKit
protocol SliderDelegate:class {
func touchesBeganSKSpriteNodeSlider(name:String?, location: CGPoint?)
func touchesMovedSKSpriteNodeSlider(name:String?, location: CGPoint?)
func touchesEndedSKSpriteNodeSlider(name:String?, location: CGPoint?)
}
class SKSpriteNodeSlider : SKSpriteNode{
weak var delegate:SliderDelegate?
init(imageNamed: String){
// super.init(imageNamed: imageNamed)
let texture = SKTexture(imageNamed: imageNamed)
super.init(texture: texture, color: .white, size: texture.size())
// self.name = name
self.isUserInteractionEnabled = true
// let icon = SKSpriteNode(color: .white, size: CGSize(width:100, height:100))
// addChild(icon)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
// for touch in touches {
if let touch = touches.first {
let loc = touch.location(in: self)
delegate?.touchesBeganSKSpriteNodeSlider(name: self.name, location: loc)
}
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
print ("touchesMoved")
// for touch in touches {
if let touch = touches.first {
let loc = touch.location(in: self)
delegate?.touchesMovedSKSpriteNodeSlider(name: self.name, location: loc)
}
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch = touches.first {
let loc = touch.location(in: self)
delegate?.touchesEndedSKSpriteNodeSlider(name: self.name, location: loc)
}
}
}