Swift 接触位掩模

所以我在我的应用程序中使用了physics Body和contactbitmasks/physicscategories，但它们工作不正常。我希望球在遇到危险时复位，或者一旦碰到球门，球就进入下一关。目前，出于测试原因，我将其设置为打印语句

我已经在代码中设置好了它们，但仍然不起作用。有什么问题

import SpriteKit
import GameplayKit

class GameScene: SKScene {

var ball = SKSpriteNode()
var danger1 = SKSpriteNode()
var danger2 = SKSpriteNode()
var goal = SKSpriteNode()


override func didMove(to view: SKView) {

    ball = self.childNode(withName: "ball") as! SKSpriteNode
    danger1 = self.childNode(withName: "danger1") as! SKSpriteNode
    danger2 = self.childNode(withName: "danger2") as! SKSpriteNode
    goal = self.childNode(withName: "goal") as! SKSpriteNode

    let border = SKPhysicsBody(edgeLoopFrom: self.frame)
    border.friction = 0
    border.restitution = 0

    danger1.physicsBody = SKPhysicsBody()
    danger1.physicsBody?.categoryBitMask = PhysicsCategories.dangerCategory
    danger2.physicsBody = SKPhysicsBody()
    danger2.physicsBody?.categoryBitMask = PhysicsCategories.dangerCategory

    ball.physicsBody = SKPhysicsBody(circleOfRadius: ball.size.width/2)
    ball.physicsBody?.categoryBitMask = PhysicsCategories.ballCategory
    ball.physicsBody?.contactTestBitMask = PhysicsCategories.dangerCategory
    ball.physicsBody?.collisionBitMask = PhysicsCategories.none

    goal.physicsBody = SKPhysicsBody()
    goal.physicsBody?.categoryBitMask = PhysicsCategories.goalCategory

    danger1.physicsBody?.isDynamic = true
    ball.physicsBody?.isDynamic = true
    goal.physicsBody?.isDynamic = true
    danger2.physicsBody?.isDynamic = true
    danger2.physicsBody!.affectedByGravity = false
    danger1.physicsBody!.affectedByGravity = false
    goal.physicsBody!.affectedByGravity = false
    ball.physicsBody!.affectedByGravity = false
    setupPhysics()

}
func setupPhysics() {
    physicsWorld.gravity = CGVector(dx: 0.0, dy: 0.0)
    physicsWorld.contactDelegate = self
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch in touches {
    }
}

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch in touches {
        let location = touch.location(in: self)
        ball.position.x = location.x
        ball.position.y = location.y
        print("x: \(ball.position.x), y: \(ball.position.y)")
    }
}

override func update(_ currentTime: TimeInterval) {
    // Called before each frame is rendered
}
}

extension GameScene: SKPhysicsContactDelegate {



func didBegin(_ contact: SKPhysicsContact) {
    let contactMask = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask

    if contactMask == PhysicsCategories.ballCategory | PhysicsCategories.dangerCategory {
        print("Contact")
    } else if contactMask == PhysicsCategories.ballCategory | PhysicsCategories.goalCategory {
        print("Goal!")
    }
}

导入SpriteKit
导入游戏工具包
类游戏场景：SKScene{
var ball=SKSpriteNode（）
var danger1=SKSpriteNode（）
var danger2=SKSpriteNode（）
var goal=SKSpriteNode（）
覆盖func didMove（到视图：SKView）{
ball=self.childNode（名称为“ball”）as！SKSpriteNode
danger1=self.childNode（名称为：“danger1”）作为！SKSpriteNode
danger2=self.childNode（名称为“danger2”）作为！SKSpriteNode
goal=self.childNode（名称为“goal”）as！SKSpriteNode
let border=SKPhysicsBody（edgeLoopFrom:self.frame）
边界摩擦力=0
border.restitution=0
danger1.physicsBody=SKPhysicsBody（）
danger1.physicsBody？.categoryBitMask=PhysicsCategories.dangerCategory
danger2.physicsBody=SKPhysicsBody（）
danger2.physicsBody？.categoryBitMask=PhysicsCategories.dangerCategory
ball.physicsBody=SKPhysicsBody（圆形半径：ball.size.width/2）
ball.physicsBody？.categoryBitMask=PhysicsCategories.ballCategory
ball.physicsBody？.contactTestBitMask=PhysicsCategories.dangerCategory
ball.physicsBody？.collisionBitMask=PhysicsCategories.none
goal.physicsBody=SKPhysicsBody（）
目标.physicsBody？.categoryBitMask=物理类别.goalCategory
危险1.physicsBody？.isDynamic=真
ball.physicsBody？.isDynamic=true
goal.physicsBody？.isDynamic=true
危险2.physicsBody？.isDynamic=真
危险2.physicsBody！.affectedByGravity=false
危险1.physicsBody！.affectedByGravity=false
goal.physicsBody！.affectedByGravity=false
ball.physicsBody！。受重力影响=false
物理（英文）
}
函数设置物理（）{
physicsWorld.gravity=CGVector（dx:0.0，dy:0.0）
physicsWorld.contactDelegate=self
}
覆盖func TouchesBegind（Touchs:Set，带有事件：UIEvent？）{
接触{
}
}
覆盖功能触摸移动（touchs:Set，带有事件：UIEvent？）{
接触{
让位置=触摸。位置（in:self）
ball.position.x=位置.x
ball.position.y=位置.y
打印（“x:\（ball.position.x），y:\（ball.position.y）”）
}
}
覆盖函数更新（uCurrentTime:TimeInterval）{
//在渲染每个帧之前调用
}
}
扩展游戏场景：SKPhysicContactDelegate{
func didbegen（uu联系人：skphysiccontact）{
让contactMask=contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask
如果contactMask==PhysicCategories.ballCategory | PhysicCategories.dangerCategory{
打印（“联系人”）
}否则，如果contactMask==PhysicCategories.ballCategory | PhysicCategories.goalCategory{
打印（“目标！”）
}
}

---

}

你的物理身体对于你的危险区域来说没有大小，那么什么东西会发生碰撞呢

danger1.physicsBody = SKPhysicsBody() should be danger1.physicsBody = SKPhysicsBody(rectangleOf:danger1.size)

现在，对于一些高级注释，除非您的精灵确实在移动，否则请禁用isDynamic。在现实世界中，墙永远不会与球碰撞，除非墙在球的顶部塌陷

清理应如下所示：

physicsWorld.contactDelegate = self
ball = self.childNode(withName: "ball") as! SKSpriteNode
danger1 = self.childNode(withName: "danger1") as! SKSpriteNode
danger2 = self.childNode(withName: "danger2") as! SKSpriteNode
goal = self.childNode(withName: "goal") as! SKSpriteNode

let border = SKPhysicsBody(edgeLoopFrom: self.frame)
border.friction = 0
border.restitution = 0

danger1.physicsBody = SKPhysicsBody(rectangleOf:danger1.size)
danger1.physicsBody?.categoryBitMask = PhysicsCategories.dangerCategory
danger1.physicsBody?.isDynamic = false

danger2.physicsBody = SKPhysicsBody(rectangleOf:danger2.size)
danger2.physicsBody?.categoryBitMask = PhysicsCategories.dangerCategory
danger2.physicsBody?.isDynamic = false

ball.physicsBody = SKPhysicsBody(circleOfRadius: ball.size.width/2)
ball.physicsBody?.categoryBitMask = PhysicsCategories.ballCategory
ball.physicsBody?.contactTestBitMask = PhysicsCategories.dangerCategory | PhysicsCategories.goalCategory
ball.physicsBody?.collisionBitMask = PhysicsCategories.none
ball.physicsBody?.isDynamic = true
ball.physicsBody!.affectedByGravity = false

goal.physicsBody = SKPhysicsBody(rectangleOf:goal.size)
goal.physicsBody?.categoryBitMask = PhysicsCategories.goalCategory
goal.physicsBody?.isDynamic = false
//setupPhysics()  Remove this

---

甚至没有人知道什么是物理分类。球分类和物理分类。危险分类。它直截了当地说它是一个SpriteNode？别以为你还需要知道什么。除非我错了，但是…Schmobr-你的游戏场景需要是一个

skphysiccontactdelegate

，除了KoD下面的答案。好的！我会尝试它，一旦我回到我的编码。感谢您的帮助，我会让您知道它是否有效：）当我删除setupPhysics（）时，不会打印任何内容/不会发生任何碰撞。我更改了SKPhysicsBody，现在允许打印项目，但如果我将打印语句更改为类似于

ball.position=CGPoint（x:0，y:550）

什么都不会发生。此外，当球碰到球门时，什么也不会发生。您是否将联系人代理移动到我在这里列出的主要功能？“不知道你的goalIt问题”说“无法将“GameSecene”类型的值分配给“SkPhysicContactDelegate”类型“不知道你做了什么，这是你的代码，我只是将行移出了设置物理。您不知何故丢失了以前分配给GameSecene的代理