Question

我正在制作一款游戏而且我一直坚持创造一种成功的物理接触方法。

func bulletCollisionWithEnemy1(enemy1: SKSpriteNode, bullet1: SKSpriteNode){ // my enemy1 and bullet are defined in my game scene 

    score += 1
    scoreLabel.text = "\(score)"
    bullet1.removeFromParent ()
    hitCount++ 
}

func enemy1Hit (enemy1:Enemy1) { //my enemy1 is defined in my game scene and my Enemy1 is a separate SKSNode class i have created containing physics properties and vars ect. 

    if (enemy1.hit() == true) {
        //enemy hit animation
    }else{
       //for animations
    }
}

这里是我定义接触物理的地方

 func didBeginContact(contact: SKPhysicsContact) {

    let firstBody : SKPhysicsBody = contact.bodyA
    let secondBody : SKPhysicsBody = contact.bodyB

    if ((firstBody.categoryBitMask == PhysicsCategory.bullet1) && 
        (secondBody.categoryBitMask == PhysicsCategory.enemy1) ||
        (firstBody.categoryBitMask == PhysicsCategory.enemy1) && 
        (secondBody.categoryBitMask == PhysicsCategory.bullet1)) {

        if let firstNode = firstBody.node as? SKSpriteNode, secondNode = secondBody .node as? SKSpriteNode {

            bulletCollisionWithEnemy1((firstNode), bullet1:  (secondNode))
        }

我的问题是我无法找到一个叫做我的enemy1hit（）函数。我的hit（）函数在我的Enemy1类中定义，因此我必须在参数中调用我的Enemy1以及在与bullet类的碰撞中调用我的命中类。

Answer 1

基于Enemy1类是SKSpriteNode的子类的假设，我认为你想要的是：

class Enemy1: SKSpriteNode {

    func bulletCollision(bullet1: SKSpriteNode){ // my enemy1 and bullet are defined in my game scene 
        score += 1
        scoreLabel.text = "\(score)"
        bullet1.removeFromParent ()
        hitCount++ 
    }

    func hit() { //my enemy1 is defined in my game 
        // scene and my Enemy1 is a separate SKSNode class i have created 
        //containing physics properties and vars ect. 

        if (enemy1.hit() == true) {
            //enemy hit animation
        } else {
           //for animations
        }
    }

}

您的代表在哪里：

func didBeginContact(contact: SKPhysicsContact) {

    let firstBody : SKPhysicsBody = contact.bodyA
    let secondBody : SKPhysicsBody = contact.bodyB

    if ((firstBody.categoryBitMask == PhysicsCategory.bullet1) && 
        (secondBody.categoryBitMask == PhysicsCategory.enemy1) ||
        (firstBody.categoryBitMask == PhysicsCategory.enemy1) && 
        (secondBody.categoryBitMask == PhysicsCategory.bullet1)) {

        if let firstNode = firstBody.node as? Enemy1, secondNode = secondBody .node as? SKSpriteNode {
            firstNode.bulletCollision(secondNode)
            firstNode.hit()
        }
    }
}

请记住，bulletCollision和hit方法是Enemy1对象的成员，因此可以在对象上调用，而不必将对象传递给它们。

如何在另一个方法中调用具有多个输入参数的方法

1 个答案: