目前我有一个Swift / Spritekit应用程序可以从天空中删除一个精灵，它们会发生冲突，因此它们会掉到地板上，但是我试图发出一个声明来检测玩家精灵何时接触精灵掉落然后从天空中删除该孩子，并在分数变量上添加一个点。
更新：04/29/18 2:10 CST 截至目前，这就是我所拥有的
import SpriteKit
import GameplayKit
class GameScene: SKScene, SKPhysicsContactDelegate {
var activePlayer:SKSpriteNode! = SKSpriteNode() //Sets active character
var bg:SKSpriteNode! = SKSpriteNode()
var bananaCollected = 0 //Defines banana var
var timer: Timer?
let bananaCat : UInt32 = 0x1 << 1
let playerCat : UInt32 = 0x1 << 2
func bananaDrop() { //Defines bananaDrop
let banana = SKSpriteNode(imageNamed:"banana")
//print("- Debug: [bananaDrop] successfully initiated -")
banana.name = "banana"
//Size of banana
banana.xScale = 0.25
banana.yScale = 0.25
//Defines physics properties
let physicsBody = SKPhysicsBody(circleOfRadius: 15)
//let physicsBody = SKPhysicsBody()
//physicsBody.pinned = true //Suspend in air
physicsBody.allowsRotation = false
physicsBody.affectedByGravity = true
//physicsBody.collisionBitMask = 0
banana.physicsBody?.categoryBitMask = bananaCat
banana.physicsBody?.collisionBitMask = 0
banana.physicsBody?.contactTestBitMask = playerCat
//categoryBitMask is what the physics category of the object is
//banana.physicsBody!.categoryBitMask = playerCategory
//collisionBitMask is what the physics category of objects that this cannot pass through are...multiple categories would be typed like... `cat1 | cat2`
//banana.physicsBody!.collisionBitMask = 0
//contactTestBitMask is what the physics category of the objects that we get alerted to upon contact
//activePlayer.physicsBody!.contactTestBitMask = obstacleCategory
banana.physicsBody = physicsBody
//Starting Location Defined
var x: CGFloat = 0 //Defines X
let y: CGFloat = 400 //Defines how high up banana drops
let bananaDrop = GKShuffledDistribution(lowestValue: 1, highestValue: 11)
//Drop locations defined (relation to X)
switch bananaDrop.nextInt() {
case 1:
x = -170
case 2:
x = -160
case 3:
x = -120
case 4:
x = -80
case 5:
x = -40
case 6:
x = 0
case 7:
x = 40
case 8:
x = 80
case 9:
x = 120
case 10:
x = 160
case 11:
x = 170
default:
fatalError("Case num outside range")
}
banana.position = CGPoint(x: x, y: y)
//Adds banana
self.addChild(banana)
}
func bDropF() { //Defintes Banana Drop Final
Timer.scheduledTimer(withTimeInterval: 1, repeats: true, block: { [weak self] timer in
self?.timer = timer
self?.timerTime()
})
}
//Stop droping bananas
deinit {
self.timer?.invalidate()
}
func timerTime() {
bananaDrop()
}
override func didMove(to view: SKView) {
print("- Debug: Game Scene Loaded -")
bDropF() //Calls banana drop
if let setupBG:SKSpriteNode = self.childNode(withName: "bg") as? SKSpriteNode {
bg = setupBG
bg.name = "bg"
bg.physicsBody?.affectedByGravity = false
bg.zPosition = -1
}
func didBeginContact(_ contact: SKPhysicsContact){ //Banana Collect
if let firstNode = contact.bodyA.node as? SKSpriteNode, let secondNode = contact.bodyB.node as? SKSpriteNode {
let object1: String = firstNode.name!
let object2: String = secondNode.name!
if (object1 == "player") || (object2 == "banana") {
print("colliding!")
}
}
}
//Player Definitions
if let randoPlayer:SKSpriteNode = self.childNode(withName: "player") as? SKSpriteNode { //Test for Char type
activePlayer = randoPlayer //Char Set
activePlayer.physicsBody?.isDynamic = true //Set dynamic
activePlayer.physicsBody?.affectedByGravity = true //Set dynamic gravity
activePlayer.name = "player"
print("Player Initiated")
print("Physics set :: Dynamic(true):AffectedByGravity(true)")
} else {
print("Failed to initiate player")
}
}
func moveActivePlayerR() {//Right Touch Player Movements Defined
let walkAnimation:SKAction = SKAction(named: "WalkRight")!
let moveAction:SKAction = SKAction.moveBy(x: 100, y: 0, duration: 0.5) //Move Right Side
//let moveRight:SKAction = SKAction.group([walkAnimation, moveAction]) //Depricated
let sound = SKAction.playSoundFileNamed("walk.wav", waitForCompletion: false)
let finalWalkR:SKAction = SKAction.group([walkAnimation, moveAction, sound])
activePlayer.run(finalWalkR)
}
func moveActivePlayerL() { //Left Touch Player Movements Defined
let walkAnimation:SKAction = SKAction(named: "WalkLeft")!
let moveAction:SKAction = SKAction.moveBy(x: -100, y: 0, duration: 0.5) //Move Left Side
//let moveRight:SKAction = SKAction.group([walkAnimation, moveAction]) //Depricated
let sound = SKAction.playSoundFileNamed("walk.wav", waitForCompletion: false)
let finalWalkL:SKAction = SKAction.group([moveAction, sound, walkAnimation])
activePlayer.run(finalWalkL)
}
func touchDown(atPoint pos : CGPoint) {
print("touch \( pos.x),\(pos.y)") //Debug print
if(pos.x > 0) { //if touched right side of screen
print("Right touch")
moveActivePlayerR()
} else if (pos.x < 0) { //if touched left side of screen
print("Left touch")
moveActivePlayerL()
}
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for t in touches {
self.touchDown(atPoint: t.location(in: self))
}
}
}
然而，即使设置了这些类别，我仍然无法让它们正常碰撞。当他们互相接触时，我的控制台中没有任何东西表明他们已经相撞。请帮忙！
答案 0 :(得分：1)
您无需设置collisionBitMask即可检测联系，您只需将contactTestBitMask设置为要检测碰撞的障碍物的类别即可。然后，在didBegin函数中检查冲突。确保您在场景中设置了SKPhysicsContactDelegate。
class GameScene: SKScene, SKPhysicsContactDelegate
self.physicsWorld.contactDelegate = self
//categoryBitMask is what the physics category of the object is
object.physicsBody!.categoryBitMask = playerCategory
//collisionBitMask is what the physics category of objects that this cannot pass through are...multiple categories would be typed like... `cat1 | cat2`
object.physicsBody!.collisionBitMask = 0
//contactTestBitMask is what the physics category of the objects that we get alerted to upon contact
object.physicsBody!.contactTestBitMask = obstacleCategory
你场景中的didBegin func
func didBeginContact(_ contact: SKPhysicsContact) {
if let firstNode = contact.bodyA.node as? SKSpriteNode, let secondNode = contact.bodyB.node as? SKSpriteNode {
let object1: String = firstNode.name!
let object2: String = secondNode.name!
if (object1 == "obstacle") || (object2 == "obstacle") {
//run some code because these 2 have collided
}
}
}
...或...
func didBeginContact(_ contact: SKPhysicsContact) {
if contact.bodyA.categoryBitMask == PhysicsCategory.obstacleCategory || contact.bodyB.categoryBitMask == PhysicsCategory.obstacleCategory {
//obstacle has hit player do something
}
}