sprite-kit SKNode Collision Alternative didBeginContact
Example
IF you are using simple categories, with each physics body belonging to only one category, then this alternative form of didBeginContact may be more readable:
func didBeginContact(contact: SKPhysicsContact) {
let contactMask = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask
switch contactMask {
case categoryBitMask.player | categoryBitMask.enemy:
print("Collision between player and enemy")
let enemyNode = contact.bodyA.categoryBitMask == categoryBitMask.enemy ? contact.bodyA.node! : contact.bodyB.node!
enemyNode.explode()
score += 10
case categoryBitMask.enemy | categoryBitMask.enemy:
print("Collision between enemy and enemy")
contact.bodyA.node.explode()
contact.bodyB.node.explode()
default :
//Some other contact has occurred
print("Some other contact")
}
}
