【发布时间】：2017-10-07 02:19:48
【问题描述】：
我最近刚刚在我的游戏中设置了碰撞检测，但它似乎不起作用。我对 spritekit 很陌生，我想知道发生了什么。下面我将为您提供游戏场景类，didMoveToView，一个在视图中生成球的函数，以及我的 Did begin 联系函数。请注意，我现在只使用红球和红块，所以它们是唯一发生碰撞的两个。请告诉我项目中是否还有其他您需要查看且未在下面提供的内容。
import SpriteKit
import GameplayKit
class GameScene: SKScene, SKPhysicsContactDelegate {
var greenBlock = SKSpriteNode ()
var redBlock = SKSpriteNode()
var yellowBlock = SKSpriteNode()
var blueBlock = SKSpriteNode()
var greenBall = SKSpriteNode()
var redBall = SKSpriteNode()
var yellowBall = SKSpriteNode()
var blueBall = SKSpriteNode()
var ball = SKSpriteNode()
var ballSpeedTop = CGVector(dx: 0, dy: 5)
var ballSpeedBottom = CGVector(dx: 0, dy: -5)
这是我为 categoryBitMask 定义数字的地方
let redBallCategory: UInt32 = 0x1 << 0
let greenBallCategory: UInt32 = 0x1 << 1
let blueBallCategory: UInt32 = 0x1 << 2
let yellowBallCategory: UInt32 = 0x1 << 3
let redBlockCategory: UInt32 = 0x1 << 4
let yellowBlockCategory: UInt32 = 0x1 << 5
let greenBlockCategory: UInt32 = 0x1 << 6
let blueBlockCategory: UInt32 = 0x1 << 7
override func didMove(to view: SKView) {
physicsWorld.contactDelegate = self
我将物理实体应用于块的位置。
redBlock = self.childNode(withName: "redBlock") as! SKSpriteNode
redBlock.physicsBody?.categoryBitMask = redBlockCategory
redBlock.physicsBody?.collisionBitMask = redBallCategory
redBlock.physicsBody?.contactTestBitMask = redBallCategory
yellowBlock = self.childNode(withName: "yellowBlock") as! SKSpriteNode
greenBlock = self.childNode(withName: "greenBlock") as! SKSpriteNode
blueBlock = self.childNode(withName: "blueBlock") as! SKSpriteNode
redBlock.physicsBody?.affectedByGravity = false
redBlock.physicsBody?.isDynamic = true
greenBlock.physicsBody?.affectedByGravity = false
greenBlock.physicsBody?.isDynamic = true
blueBlock.physicsBody?.affectedByGravity = false
blueBlock.physicsBody?.isDynamic = false
yellowBlock.physicsBody?.affectedByGravity = false
yellowBlock.physicsBody?.isDynamic = false
initializeGame()
print("hello")
}
func initializeGame (){
Timer.scheduledTimer(timeInterval: TimeInterval(randomBetweenNumbers(firstNum: 2, secondNum: 4)), target: self, selector: #selector(topBall), userInfo: nil, repeats: true)
Timer.scheduledTimer(timeInterval: TimeInterval(randomBetweenNumbers(firstNum: 2, secondNum: 4)), target: self, selector: #selector(bottomBall), userInfo: nil, repeats: true)
}
// 顶级产卵器
func topBall () -> SKSpriteNode {
let ball: SKSpriteNode?;
if Int(randomBetweenNumbers(firstNum: 0, secondNum: 2)) == 0 {
ball = SKSpriteNode(imageNamed: "redBall")
ball?.name = "redBall"
ball!.physicsBody?.categoryBitMask = redBallCategory
ball!.physicsBody?.collisionBitMask = redBlockCategory
ball!.physicsBody?.contactTestBitMask = redBlockCategory
} else {
ball = SKSpriteNode(imageNamed: "greenBall")
ball?.name = "greenBall"
}
ball!.size = CGSize(width: 30, height: 30)
ball!.anchorPoint = CGPoint(x: 0.5, y: 0.5)
ball!.position = CGPoint(x: 0, y: 0)
ball!.physicsBody = SKPhysicsBody(circleOfRadius: ball!.size.height / 2)
ball!.physicsBody?.affectedByGravity = false
ball!.physicsBody?.isDynamic = true
ball!.zPosition = 2
self.addChild(ball!)
ball!.physicsBody?.applyImpulse(ballSpeedTop)
return ball!
}
联系功能
func didBegin(_ contact: SKPhysicsContact) {
if (contact.bodyA.categoryBitMask == redBallCategory && contact.bodyB.categoryBitMask == redBlockCategory){
print("touched red block")
} else if (contact.bodyB.categoryBitMask == redBallCategory && contact.bodyA.categoryBitMask == redBlockCategory){
print("touched a red block")
}
}
UPDATE::: 我找到了哪里出错了，但我的问题还没有从技术上解决。我在 if 语句之外应用了 redBall 的属性，这意味着 redballs 类别位掩码等应用于两个球，我需要一种方法在 redBall 生成时将 redBall 类别位掩码应用到不同的 categorybitmask绿球生成时。
func topBall () -> SKSpriteNode {
let ball: SKSpriteNode?;
if Int(randomBetweenNumbers(firstNum: 0, secondNum: 2)) == 0 {
ball = SKSpriteNode(imageNamed: "redBall")
ball?.name = "redBall"
} else {
ball = SKSpriteNode(imageNamed: "greenBall")
ball?.name = "greenBall"
}
ball!.size = CGSize(width: 30, height: 30)
ball!.anchorPoint = CGPoint(x: 0.5, y: 0.5)
ball!.position = CGPoint(x: 0, y: 0)
ball!.physicsBody = SKPhysicsBody(circleOfRadius: ball!.size.height / 2)
ball!.physicsBody?.affectedByGravity = false
ball!.physicsBody?.isDynamic = true
ball!.physicsBody?.categoryBitMask = redBallCategory
ball!.physicsBody?.collisionBitMask = redBlockCategory
ball!.physicsBody?.contactTestBitMask = redBlockCategory
ball!.zPosition = 2
self.addChild(ball!)
ball!.physicsBody?.applyImpulse(ballSpeedTop)
return ball!
}
这就是我让它工作的方式，但问题是我想根据它是绿色还是红色将单个类别位掩码应用于球。
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标签： ios swift3 sprite-kit game-physics skspritenode