我跟着许多关于碰撞的不同教程并创建了我自己的游戏，我想宣布硬币和玩家之间的碰撞。但是，在实现碰撞代码后，我的两个节点没有响应碰撞...有人可以帮帮我吗？
import SpriteKit
import GameplayKit
// Collision categories
enum ColliderType: UInt32 {
case playerCase = 1
case coinCase = 2
case borderCase = 3
}
class GameScene: SKScene, SKPhysicsContactDelegate {
let player = SKSpriteNode(imageNamed:"block")
let buttonDirLeft = SKSpriteNode(imageNamed: "left")
let buttonDirRight = SKSpriteNode(imageNamed: "right")
let coins = SKSpriteNode(imageNamed: "coins")
let background = SKSpriteNode(imageNamed: "background")
var pressedButtons = [SKSpriteNode]()
override func didMove(to view: SKView) {
self.physicsWorld.contactDelegate = self
//score label
let points = SKLabelNode(text: "0")
points.position = CGPoint(x: 530, y: 260)
points.zPosition = 6
points.fontColor = UIColor.black
points.fontSize = 50
addChild(points)
//Set Background
background.zPosition = 1
background.position = CGPoint(x: frame.size.width / 2, y: frame.size.height / 2)
background.size.width = 580
background.size.height = 320
addChild(background)
// Player
player.position = CGPoint(x: 250, y: 40)
player.zPosition = 2
player.texture?.filteringMode = .nearest
// player!.collisionBitMask = 0 //
player.physicsBody = SKPhysicsBody(circleOfRadius: player.size.height / 2.0)
player.physicsBody?.isDynamic = false
player.physicsBody?.allowsRotation = false
player.physicsBody?.affectedByGravity = false
player.physicsBody!.categoryBitMask = ColliderType.playerCase.rawValue
player.physicsBody!.contactTestBitMask = ColliderType.coinCase.rawValue
player.physicsBody!.collisionBitMask = ColliderType.coinCase.rawValue
self.addChild(player)
// button left
buttonDirLeft.position = CGPoint(x: 30, y: 35)
buttonDirLeft.zPosition = 4
buttonDirLeft.size.width = 270
buttonDirLeft.size.height = 320
buttonDirLeft.alpha = 0.0
self.addChild(buttonDirLeft)
// button right
buttonDirRight.position = CGPoint(x: 530, y: 35)
buttonDirRight.zPosition = 4
buttonDirRight.size.width = 270
buttonDirRight.size.height = 320
buttonDirRight.alpha = 0.0
self.addChild(buttonDirRight)
// setting border around game
let borderBody = SKPhysicsBody(edgeLoopFrom: self.frame)
borderBody.friction = 0
self.physicsBody = borderBody
//ENEMY SETTINGS START
//repeat coing spawning
run(SKAction.repeatForever(
SKAction.sequence([
SKAction.run(spawnCoins),
SKAction.wait(forDuration: 1.0)])))
}
//coin settings
func random() -> CGFloat {
return CGFloat(Float(arc4random()) / 0xFFFFFFFF)
}
func random(min: CGFloat, max: CGFloat) -> CGFloat {
return random() * (max - min) + min
}
//spawn coins
func spawnCoins() {
// 2
let coins = SKSpriteNode(imageNamed: "coins")
coins.zPosition = 2
coins.size.width = 40
coins.size.height = 40
let action = SKAction.moveTo(y: -350, duration: TimeInterval(random(min: 1, max: 5)))
let remove = SKAction.run({coins.removeFromParent(); print("coins removed from scene")})
let sequence = SKAction.sequence([action,remove])
coins.physicsBody = SKPhysicsBody(rectangleOf: coins.size )
coins.physicsBody?.isDynamic = false
coins.physicsBody!.affectedByGravity = false
coins.physicsBody!.categoryBitMask = ColliderType.coinCase.rawValue
coins.physicsBody!.contactTestBitMask = ColliderType.playerCase.rawValue
coins.physicsBody!.collisionBitMask = ColliderType.playerCase.rawValue
coins.run(sequence)
coins.size.width = 20
coins.size.height = 20
coins.name = "coins"
// coins.physicsBody!.collisionBitMask = 0
coins.position = CGPoint(x: frame.size.width * random(min: 0, max: 1), y: frame.size.height + coins.size.height/2)
addChild(coins)
}
override func update(_ currentTime: TimeInterval) {
// Called before each frame is rendered
/* Called before each frame is rendered */
if pressedButtons.index(of: buttonDirLeft) != nil {
player.position.x -= 3.0
}
if pressedButtons.index(of: buttonDirRight) != nil {
player.position.x += 3.0
}
// Update entities
}
//MOVEMENT FUNCTIONS START HERE
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch: AnyObject in touches {
let location = touch.location(in: self)
let previousLocation = touch.previousLocation(in: self)
for button in [buttonDirLeft, buttonDirRight] {
// I check if they are already registered in the list
if button.contains(location) && pressedButtons.index(of: button) == nil {
pressedButtons.append(button)
}
}
}
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch: AnyObject in touches {
let location = touch.location(in: self)
let previousLocation = touch.previousLocation(in: self)
for button in [buttonDirLeft, buttonDirRight] {
// if I get off the button where my finger was before
if button.contains(previousLocation)
&& !button.contains(location) {
// I remove it from the list
let index = pressedButtons.index(of: button)
if index != nil {
pressedButtons.remove(at: index!)
}
}
// if I get on the button where I wasn't previously
else if !button.contains(previousLocation)
&& button.contains(location)
&& pressedButtons.index(of: button) == nil {
// I add it to the list
pressedButtons.append(button)
}}}}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch: AnyObject in touches {
let location = touch.location(in: self)
let previousLocation = touch.previousLocation(in: self)
for button in [buttonDirLeft, buttonDirRight] {
if button.contains(location) {
let index = pressedButtons.index(of: button)
if index != nil {
pressedButtons.remove(at: index!)
}
}
else if (button.contains(previousLocation)) {
let index = pressedButtons.index(of: button)
if index != nil {
pressedButtons.remove(at: index!)
}
}
}
}
}
override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch: AnyObject in touches {
let location = touch.location(in: self)
let previousLocation = touch.previousLocation(in: self)
for button in [buttonDirLeft, buttonDirRight] {
if button.contains(location) {
let index = pressedButtons.index(of: button)
if index != nil {
pressedButtons.remove(at: index!)
}
}
else if (button.contains(previousLocation)) {
let index = pressedButtons.index(of: button)
if index != nil {
pressedButtons.remove(at: index!)
}
}
}
}
}
func didBeginContact(contact: SKPhysicsContact){
print("colliding!")
}
答案 0 :(得分：2)
只有当至少一个身体是动态的时，才会发生联系。因此，要么将播放器或硬币设置为动态，如果其他所有设置都正确（如果类别设置正确并且didBeginContact方法实现正确），您的身体现在将发生碰撞/建立联系。如果您只对联系人感兴趣，请将碰撞位掩码设置为0。