How detect collision between a box object and ball - swift

Question

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
guard let touch = touches.first else { return }
let location = touch.location(in: self) // locates touches on the screen
let objects = nodes(at: location) // shows all objects were screen was touched
if objects.contains(editLabel) { // checking if appropriate array of objects contains the editLabel
editingMode.toggle()
} else {
if editingMode {
let size = CGSize(width: Int.random(in: 16...128), height: 16)
let box = SKSpriteNode(color: UIColor(red: CGFloat.random(in: 0...1), green: CGFloat.random(in: 0...1), blue: CGFloat.random(in: 0...1), alpha: 1), size: size)
box.zRotation = CGFloat.random(in: 0...3)
box.position = location // add the box ob ject were the user taps
box.name = "box"
box.physicsBody = SKPhysicsBody(rectangleOf: box.size)
box.physicsBody!.contactTestBitMask = box.physicsBody!.collisionBitMask
box.physicsBody?.isDynamic = false // box object will not move when impact happens
addChild(box) // box object will be added to the screen
} else if usedBalls != 0 {
let ball = SKSpriteNode(imageNamed: allBalls.randomElement() ?? "ballRed.png") // pulls out the red ball from app bundle
ball.physicsBody = SKPhysicsBody(circleOfRadius: ball.size.width / 2.0) // animates the ball object
ball.physicsBody!.contactTestBitMask = ball.physicsBody!.collisionBitMask
ball.physicsBody?.restitution = 0.4 // determines the ball object bounciness
ball.position = location // ball will appear where the user tapped on the screen
ball.name = "ball"
// ball.position = CGPoint (x: 550, y: 700)
addChild (ball) // adds the ball object to the screen
usedBalls -= 1
}
}
}
func makeBouncer(at position: CGPoint) {
let bouncer = SKSpriteNode(imageNamed: "bouncer.png")
bouncer.position = position
bouncer.physicsBody = SKPhysicsBody(circleOfRadius: bouncer.size.width / 2.0)
bouncer.physicsBody?.isDynamic = false // bouncer object is fixed to the bottom of the screen
addChild(bouncer)
}
func makeSlot(at position: CGPoint, isGood: Bool) {
var slotBase: SKSpriteNode
var slotGlow: SKSpriteNode
if isGood {
slotBase = SKSpriteNode(imageNamed: "slotBaseGood.png")
slotGlow = SKSpriteNode(imageNamed: "slotGlowGood.png")
slotBase.name = "good"
} else {
slotBase = SKSpriteNode(imageNamed: "slotBaseBad.png")
slotGlow = SKSpriteNode(imageNamed: "slotGlowBad.png")
slotBase.name = "bad"
}
slotBase.position = position
slotGlow.position = position
slotBase.physicsBody = SKPhysicsBody(rectangleOf: slotBase.size)
slotBase.physicsBody?.isDynamic = false
addChild(slotBase)
addChild(slotGlow)
let spin = SKAction.rotate(byAngle: .pi, duration: 10)
let spinForever = SKAction.repeatForever(spin)
slotGlow.run(spinForever)
}
func collisionBetween(ball: SKNode, object: SKNode) {
if object.name == "good" { // green slot
destroy(ball: ball)
score += 1
usedBalls += 1
} else if object.name == "bad" { // red slot
destroy(ball: ball) // the ball will be removed once drops into a green or red slot
score -= 1
}
}
func boxandballCollision(box: SKNode, ball: SKNode) {
if ball.name == "ball" {
destroyObject(box: box)
}
}
func destroyObject(box: SKNode) {
if let fireParticles = SKEmitterNode(fileNamed: "FireParticles") {
fireParticles.position = box.position
addChild(fireParticles)
}
box.removeFromParent() // box should be removed when a ball will hit it
}
func destroy(ball: SKNode) {
if let fireParticles = SKEmitterNode(fileNamed: "FireParticles") {
fireParticles.position = ball.position
addChild(fireParticles)
}
ball.removeFromParent() // ball object is removed from scene when hits a slot
}
func didBegin(_ contact: SKPhysicsContact) {
guard let nodeA = contact.bodyA.node else { return }
guard let nodeB = contact.bodyB.node else { return }
if nodeA.name == "ball" {
collisionBetween(ball: nodeA, object: nodeB)
} else if nodeB.name == "ball" {
collisionBetween(ball: nodeB, object: nodeA)
}
}
func begin(_ contact: SKPhysicsContact) {
guard let nodeA = contact.bodyA.node else { return }
guard let nodeB = contact.bodyB.node else { return }
if nodeA.name == "box" {
boxandballCollision(box: nodeA, ball: nodeB)
} else if nodeB.name == "box" {
boxandballCollision(box: nodeB, ball: nodeA)
}
}
I want to remove any box object when a ball will hit it, is just a simple game for studying purposes, but I'm struggling with it. I have used exactly same methods for the box object and this to get notifications about every collision " box.physicsBody!.contactTestBitMask = box.physicsBody!.collisionBitMask".