如何禁用两个 SKSpriteNodes 之间的联系？
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【中文标题】如何禁用两个 SKSpriteNodes 之间的联系？【英文标题】：How to Disable contact between two SKSpriteNodes? 【发布时间】：2016-02-25 23:09:23 【问题描述】：由于某种原因，在下面的代码中，当食物（豌豆）相互接触时，敌人细菌会移动它们。我没有对它们进行编码来测试彼此的接触。有什么帮助吗？我试图让这两种精灵不可能发生碰撞。
import SpriteKit
var apple=SKSpriteNode()
class GameScene: SKScene, SKPhysicsContactDelegate
var bg=SKSpriteNode()
var peas=SKSpriteNode()
var bacteria=SKSpriteNode()
var bactys_Y=[SKSpriteNode]()
var bactys_X=[SKSpriteNode]()
var border=CGRect()
// var gandolf=SKSpriteNode()
enum ColliderType:UInt32
case Bug=1
case Food=2
case Enemy=4
case Gandolf=8
override func didMoveToView(view: SKView)
border=CGRect(x: 0, y: self.frame.height, width: self.frame.width, height: self.frame.height-200)
//gandolf.physicsBody=SKPhysicsBody(edgeLoopFromRect: border)
let bactPic=SKTexture(imageNamed: "bacteria.png")
/* Setup your scene here */
//bg info
self.physicsWorld.contactDelegate=self
let bg_texture=SKTexture(imageNamed: "wood-texture-pattern.jpg")
bg=SKSpriteNode(texture: bg_texture)
bg.position=CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))
bg.size.height=self.frame.height
bg.size.width=self.frame.width
// self.addChild(bg)
//bug info
let applePic=SKTexture(imageNamed:"bug.png")
apple=SKSpriteNode(texture:applePic)
apple.position=CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame))
print(self.frame.width)
// let bactPic=SKTexture(imageNamed: "bacteria.png")
//peas info
let peas_texture=SKTexture(imageNamed: "peas.png")
peas=SKSpriteNode(texture: peas_texture)
// peas.position=CGPointMake(200,300)
peas.physicsBody=SKPhysicsBody(circleOfRadius: peas_texture.size().width/4)
apple.physicsBody=SKPhysicsBody(circleOfRadius:applePic.size().width/2)
peas.physicsBody?.affectedByGravity=false
apple.physicsBody?.affectedByGravity=false
bg.zPosition=1
apple.zPosition=2
peas.zPosition=3
apple.physicsBody!.categoryBitMask=ColliderType.Bug.rawValue
apple.physicsBody!.contactTestBitMask=ColliderType.Food.rawValue
peas.physicsBody!.categoryBitMask=ColliderType.Food.rawValue
peas.physicsBody!.contactTestBitMask=ColliderType.Bug.rawValue
bacteria.physicsBody=SKPhysicsBody(circleOfRadius: bactPic.size().width*0.06/2)
bacteria.physicsBody!.categoryBitMask=ColliderType.Enemy.rawValue
bacteria.physicsBody!.contactTestBitMask=ColliderType.Bug.rawValue
// gandolf.physicsBody?.categoryBitMask=ColliderType.Gandolf.rawValue
// gandolf.physicsBody?.categoryBitMask=ColliderType.Enemy.rawValue
peas.setScale(0.4)
apple.setScale(0.5)
// bacteria info
// gandolf.color=UIColor.blackColor()
// self.addChild(gandolf)
self.addChild(apple)
// self.addChild(peas)
_=NSTimer.scheduledTimerWithTimeInterval(10, target: self, selector: Selector("spawnBacteria"), userInfo: nil, repeats: true)
spawnBacteria()
spawnFood()
func didBeginContact(contact: SKPhysicsContact)
// peas.removeFromParent()
// spawnFood()
let first=contact.bodyA
let second=contact.bodyB
if first.categoryBitMask==ColliderType.Bug.rawValue || second.categoryBitMask==ColliderType.Bug.rawValue
if first.categoryBitMask==ColliderType.Food.rawValue || second.categoryBitMask==ColliderType.Food.rawValue
peas.removeFromParent()
spawnFood()
if first.categoryBitMask==ColliderType.Bug.rawValue || second.categoryBitMask==ColliderType.Bug.rawValue
if first.categoryBitMask==ColliderType.Enemy.rawValue || second.categoryBitMask==ColliderType.Enemy.rawValue
print("DEATH")
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?)
/* Called when a touch begins */
override func update(currentTime: CFTimeInterval)
/* Called before each frame is rendered */
// print("x: "+String(apple.position.x))
// print("y: "+String(apple.position.y))
for node:SKSpriteNode in bactys_X
if node.position.x<=0
print("collide")
node.physicsBody?.velocity=CGVector(dx:0, dy:0)
node.physicsBody?.applyImpulse(CGVector(dx:6, dy:0))
else if node.position.x>=self.frame.size.width-3
node.physicsBody?.velocity=CGVector(dx:0,dy:0)
node.physicsBody?.applyImpulse(CGVector(dx:-6,dy:0))
for node:SKSpriteNode in bactys_Y
if node.position.y>=self.frame.size.height-3
node.physicsBody?.velocity=CGVector(dx:0,dy:0)
node.physicsBody?.applyImpulse(CGVector(dx:0,dy:-6))
else if node.position.y<=200
node.physicsBody?.velocity=CGVector(dx:0,dy:0)
node.physicsBody?.applyImpulse(CGVector(dx:0,dy:6))
func spawnFood()
let peas_texture=SKTexture(imageNamed: "peas.png")
peas=SKSpriteNode(texture: peas_texture)
peas.physicsBody=SKPhysicsBody(circleOfRadius: peas_texture.size().width/4)
peas.zPosition=3
peas.physicsBody?.affectedByGravity=false
peas.physicsBody?.categoryBitMask=ColliderType.Food.rawValue
peas.physicsBody?.contactTestBitMask=ColliderType.Bug.rawValue
let x=CGFloat(arc4random_uniform(UInt32(self.frame.size.width-40)+20))
let y=CGFloat(arc4random_uniform(UInt32(self.frame.size.height-20-200))+200)
//print(self.frame.size.width)
print("height: "+String(self.frame.size.height))
print("x: "+String(x))
print("y: "+String(y))
peas.position=CGPointMake(x,y)
peas.setScale(0.4)
self.addChild(peas)
func spawnBacteria()
let bactPic=SKTexture(imageNamed: "bacteria.png")
bacteria=SKSpriteNode(texture: bactPic)
bacteria.physicsBody=SKPhysicsBody(circleOfRadius: bactPic.size().width*0.06/2)
bacteria.physicsBody?.affectedByGravity=false
bacteria.physicsBody?.categoryBitMask=ColliderType.Enemy.rawValue
bacteria.physicsBody?.contactTestBitMask=ColliderType.Bug.rawValue
// bacteria.physicsBody?.contactTestBitMask=ColliderType.Gandolf.rawValue
bacteria.zPosition=4
let x=CGFloat(arc4random_uniform(UInt32(self.frame.size.width-40)+20))
let y=CGFloat(arc4random_uniform(UInt32(self.frame.size.height-20-200))+200)
bacteria.position=CGPointMake(x,y)
bacteria.setScale(0.06)
let decide=Int(arc4random_uniform(3))
self.addChild(bacteria)
if decide==0
//move left
// let move=SKAction.moveByX(-6, y: 0, duration: 0.1)
// let start=SKAction.repeatActionForever(move)
//bacteria.runAction(start)
bacteria.physicsBody?.applyImpulse(CGVector(dx: -6,dy: 0))
bactys_X.append(bacteria)
else if decide==1
//move right
// let move=SKAction.moveByX(6, y: 0, duration: 0.1)
// let start=SKAction.repeatActionForever(move)
// bacteria.runAction(start)
bacteria.physicsBody?.applyImpulse(CGVector(dx: 6, dy: 0))
bactys_X.append(bacteria)
else if decide==2
//move up
// let move=SKAction.moveByX(0, y: 6, duration: 0.1)
// let start=SKAction.repeatActionForever(move)
// bacteria.runAction(start)
bacteria.physicsBody?.applyImpulse(CGVector(dx: 0, dy: 6))
bactys_Y.append(bacteria)
else
//move down
// let move=SKAction.moveByX(0, y: -6, duration: 0.1)
// let start=SKAction.repeatActionForever(move)
// bacteria.runAction(start)
bacteria.physicsBody?.applyImpulse(CGVector(dx: 0,dy: -6))
bactys_Y.append(bacteria)
【问题讨论】：
【参考方案1】：默认情况下，物理体的碰撞位掩码设置为 0xFFFFFFFF（与所有对象交互），其动态属性设置为 true。查看您的代码，您似乎没有设置它们，因此它使用默认值。
您必须设置这些属性才能达到您想要的结果
...physicsBody.dynamic = false
...physicsBody.collisionBitMask = //set to something
【讨论】：
我的荣幸，快乐的编码以上是关于如何禁用两个 SKSpriteNodes 之间的联系？的主要内容，如果未能解决你的问题，请参考以下文章
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