I kinda struggling to sort this problem out, I have created same methods to detect which is the box but somthing is still ain't right here this is my code:

If someone could help me and share some code it will be much appreciated

Where I create the box I have added " box.physicsBody?.contactTestBitMask = box.physicsBody!.collisionBitMask"

I kind of declared same methods but is still not working.

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.physicsBody?.contactTestBitMask = box.physicsBody!.collisionBitMask box.zRotation = CGFloat.random(in: 0...3) box.position = location // add the box object were the user taps box.name = "box"

            box.physicsBody = SKPhysicsBody(rectangleOf: box.size)
            box.physicsBody?.isDynamic = false // box object will not move when impact happens
            addChild(box) // box object will be added to the screen

              func boxandballCollision(box: SKNode, ball: SKNode) {
    if ball.name == "ball" {
        destroyObject(box: box)
    } else 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 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: nodeB, ball: nodeB)
    } else if nodeB.name == "box" {
        boxandballCollision(box: nodeA, ball: nodeA)
      }
   }
}

func boxandballCollision(box: SKNode, ball: SKNode) {
if ball.name == "ball" {
destroyObject(box: box)
} else if ball.name == "ball" {
destroyObject(box: box)
}
}

In your codes,this function has only one activity in the closure actually,so why do you write with if and else if ?

@little87 I kno is pointless it will do the same thing regardless, I have removed that else if statement, but still nothing is happening when a ball hits a box object. I still didn't figure this out. I don't understand why is not detecting the collision between box and ball.

After adding the name "box" to the boxes as they are created, add something like this in your collision function:

func collisionBetween(ball: SKNode, object: SKNode) {
        if object.name == "good" {
            destroy(ball: ball)
            score += 1
        } else if object.name == "bad" {
            destroy(ball: ball)
            score -= 1
        } else if object.name == "box" {
            object.removeFromParent()
        }
 }