how to define the area of a node to make it a button - swift

Question

AS always, I am not familiar with swift and SpriteKit, so apologies.
I am creating a button that changes scene. I am using a simple code that detects if the touch is in the SKNode area, if yes it changes the scene.
My problem is that the node.position is defined by a CGPoint, not an area, so when you touch the screen you never actually touch the node.
Any suggestion?
I don't know how to solve the problem.
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
let location = touch.location(in: self)
let touchedNode = atPoint(location)
if touchedNode.name == "B" {
let menuScene = MenuScene(size: view!.bounds.size)
view!.presentScene(menuScene)
}
}
}

Answer 1

SOLVED! I created the node "B" with text initialiser and not with name initialiser, that is why I could not find it.
let b = SKLabelNode(name: "B")
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
let location = touch.location(in: self)
let nodeB = self.childNode(withName: "B")
let frameB = nodeB!.calculateAccumulatedFrame()
let minX = frameB.minX
let maxX = frameB.maxX
let minY = frameB.minY
let maxY = frameB.maxY
if location.x > minX && location.x < maxX {
if location.y > minY && location.y < maxY {
let gameScene = GameScene(size: view!.bounds.size)
view!.presentScene(gameScene)
}
}
}
}