【发布时间】：2016-11-29 05:34:11
【问题描述】：
当我运行它时，我的节点正在碰撞。玩家节点的硬币反弹。但是，当我想调用 didBeginContact 函数时，它没有响应...... 每次硬币击中玩家时，我最终都希望有一个标签显示得分 +1。与玩家碰撞时，硬币也应该消失。但是我的联系人不起作用，所以我无法制定任何碰撞规则让标签显示分数。
import SpriteKit
import GameplayKit
// Collision categories
struct physicsCategory {
static let playerCat : UInt32 = 1
static let coinCat : UInt32 = 2
}
class GameScene: SKScene, controls, SKPhysicsContactDelegate {
let player = SKSpriteNode(imageNamed:"trump")
let points = SKLabelNode()
let buttonDirLeft = SKSpriteNode(imageNamed: "left")
let buttonDirRight = SKSpriteNode(imageNamed: "right")
let background = SKSpriteNode(imageNamed: "background")
var pressedButtons = [SKSpriteNode]()
let popUpMenu = SKSpriteNode(imageNamed: "popupmenu")
var score = 0
var gameOver = false
var startGame = false
var rules = false
override func didMove(to view: SKView) {
self.physicsWorld.contactDelegate = self
//score label
points.position = CGPoint(x: 530, y: 260)
points.text = ("\(score)")
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.size.width = 40
player.size.height = 60
player.physicsBody = SKPhysicsBody(rectangleOf: player.size)
player.physicsBody?.affectedByGravity = false
player.physicsBody!.categoryBitMask = physicsCategory.playerCat
player.physicsBody!.contactTestBitMask = physicsCategory.coinCat
player.physicsBody?.collisionBitMask = 0
player.physicsBody?.isDynamic = false
self.addChild(player)
//contact has started
func didBeginContact(contact: SKPhysicsContact){
let firstBody: SKPhysicsBody = contact.bodyA
let secondBody: SKPhysicsBody = contact.bodyB
if ((firstBody.categoryBitMask == physicsCategory.playerCat) && (secondBody.categoryBitMask == physicsCategory.coinCat)){
CollisionWithCoin(player: firstBody.node as! SKSpriteNode, coins: secondBody.node as! SKSpriteNode)
}
}
func CollisionWithCoin(player: SKSpriteNode, coins:SKSpriteNode){
NSLog("Hello")
}
//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 = 25
coins.size.height = 25
coins.physicsBody = SKPhysicsBody(rectangleOf: coins.size )
coins.physicsBody!.categoryBitMask = physicsCategory.coinCat
coins.physicsBody!.contactTestBitMask = physicsCategory.playerCat
coins.physicsBody?.collisionBitMask = 1
coins.position = CGPoint(x: frame.size.width * random(min: 0, max: 1), y: frame.size.height + coins.size.height/2)
let action = SKAction.moveTo(y: -350, duration: TimeInterval(random(min: 1, max: 5)))
let remove = SKAction.run({coins.removeFromParent()})
let sequence = SKAction.sequence([action,remove])
coins.run(sequence)
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 -= 4.0
}
if pressedButtons.index(of: buttonDirRight) != nil {
player.position.x += 4.0
}
}
//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!)
}
}
}
}
}
}
【问题讨论】：