Question

当我运行此代码时，第一个CollisionWithplayer行给出了错误的指令错误。错误并不是每次都出现，只是偶尔出现一次，没有相似的条件来确定导致错误的原因。

func didBeginContact(contact: SKPhysicsContact) {
    let firstBody : SKPhysicsBody = contact.bodyA
    let secondBody : SKPhysicsBody = contact.bodyB


    if ((firstBody.categoryBitMask == PhysicsCategory.Goblin) && (secondBody.categoryBitMask == PhysicsCategory.Bullet) ||
        (firstBody.categoryBitMask == PhysicsCategory.Bullet) && (secondBody.categoryBitMask == PhysicsCategory.Goblin))
    {

       CollisionWithBullet(firstBody.node as! SKSpriteNode, Bullet: secondBody.node as! SKSpriteNode)
    }
        else  if ((firstBody.categoryBitMask == PhysicsCategory.Goblin) && (secondBody.categoryBitMask == PhysicsCategory.player) ||
        (firstBody.categoryBitMask == PhysicsCategory.player) && (secondBody.categoryBitMask == PhysicsCategory.Goblin)){

        CollisionWithplayer(firstBody.node as! SKSpriteNode, player: secondBody.node as! SKSpriteNode)
            }

func CollisionWithBullet(Goblin: SKSpriteNode, Bullet:SKSpriteNode){
    Goblin.removeFromParent()
    Bullet.removeFromParent()
    score += 1
    ScoreLbl.text = "\(score)"
    var explosion = SKEmitterNode(fileNamed: "Goblin Death Animation.sks")
    explosion!.particlePosition = Goblin.position
    self.addChild(explosion!)
    var fire = SKEmitterNode(fileNamed: "Goblin Death Animation 2.sks")
    fire!.particlePosition = Goblin.position
    self.addChild(fire!)


}
func CollisionWithplayer(Goblin: SKSpriteNode, player: SKSpriteNode){
    let ScoreDefault = NSUserDefaults.standardUserDefaults()
    ScoreDefault.setValue(score, forKey: "Score")
    ScoreDefault.synchronize()


    if (score > Highscore){

        let HighscoreDefault = NSUserDefaults.standardUserDefaults()
        HighscoreDefault.setValue(score, forKey: "Highscore")

    }

    Goblin.removeFromParent()
    player.removeFromParent()
    self.view?.presentScene(EndScene())
    ScoreLbl.removeFromSuperview()
}

Answer 1

我假设您收到错误，因为您的代码不会处理1次碰撞导致didBeginContact方法多次触发的情况（碰撞发生在同一节点的2个点）

我会像这样重写你的代码以避免这种情况（使用选项）。此外，我稍微重写了一下，因此您不必为每次碰撞编写2个if语句。

phoneFault = raw_input("Is your phone physically damaged?")
while phoneFault != "Yes" and phoneFault != "No":
    print("Error; you can only answer 'Yes' or 'No' to the questions.")
if phoneFault == "Yes" or phoneFault == "yes":
    phoneFault = raw_input("Is your phone wet?")
    if phoneFault == "Yes" or phoneFault == "yes":
        phoneFault = raw_input("Are you able to turn it off?")
        if phoneFault == "Yes" or phoneFault == "yes":
            print("Send the phone to the manufacturer and ask if they can fix it.")
        elif phoneFault == "No" or phoneFault == "no":
            print("Dry the phone, and then wait for the phone to run out of power and then restart it.")

请同时遵循swift guidlines，你的方法和属性应该开始，小写字母不会是大写字母。

希望这有帮助

斯威夫特：物理身体碰撞不良指令错误

1 个答案: