處理聯絡人

將場景設定為委託

//set your scene as SKPhysicsContactDelegate

class yourScene: SKScene, SKPhysicsContactDelegate

self.physicsWorld.contactDelegate = self;

然後你必須實現一個或另一個聯絡人函式：可選的 func didBegin（聯絡人）和/或可選的基金 didEnd（contact :)方法來填寫你的聯絡邏輯，例如像

//order

let bodies = (contact.bodyA.categoryBitMask <= contact.bodyB.categoryBitMask) ? (A:contact.bodyA,B:contact.bodyB) : (A:contact.bodyB,B:contact.bodyA)
    
    
//real handler
if ((bodies.B.categoryBitMask & boxBody) == boxBody){
   if ((bodies.A.categoryBitMask & groundBody) == groundBody) {
       let vector = bodies.B.velocity
       bodies.B.velocity = CGVectorMake(vector.dx, vector.dy * 4)

   }else{
       let vector = bodies.A.velocity
       bodies.A.velocity = CGVectorMake(vector.dx, vector.dy * 10)

   }
}