我制作的游戏会从屏幕顶部生成多维数据集，当它们被触摸时会消失。我将对象位置设置为用户触摸的点。它运行函数DidBeginContact，但它似乎没有检测到我的两个视图：
func didBeginContact(contact: SKPhysicsContact) {
var firstBody : SKPhysicsBody = contact.bodyA
var secondBody : SKPhysicsBody = contact.bodyB
print("didbegincontact")
if ((firstBody.categoryBitMask == PhysicsCategory.RedSquare) && (secondBody.categoryBitMask == PhysicsCategory.touchlocation)) || ((firstBody.categoryBitMask == PhysicsCategory.touchlocation) && (secondBody.categoryBitMask == PhysicsCategory.RedSquare)) {
collisionwithredsquare(firstBody.node as! SKSpriteNode)
print("Done")
}
}
它的印刷＆＃34; didBegincontact＆＃34;所以我知道函数正在运行，但if语句不是。
以下是所有代码：
import SpriteKit
struct PhysicsCategory {
static let RedSquare : UInt32 = 1
static let touchlocation : UInt32 = 2
static let BlueSquare : UInt32 = 3
}
class GameScene: SKScene, SKPhysicsContactDelegate {
var animator : UIDynamicAnimator?
let blueSquare = SKSpriteNode()
let redSquare = SKSpriteNode()
var scorenumber = 0
var ground = SKSpriteNode()
var touchpoint = SKSpriteNode()
override func didMoveToView(view: SKView) {
/* Setup your scene here */
physicsWorld.contactDelegate = self
physicsWorld.gravity = CGVector(dx: 1.0, dy: -9.0)
/* let borderBody = SKPhysicsBody(edgeLoopFromRect: self.frame)
// 2. Set the friction of that physicsBody to 0
borderBody.friction = 0
// 3. Set physicsBody of scene to borderBody
self.physicsBody = borderBody */
touchpoint = SKSpriteNode(imageNamed:"Spaceship")
touchpoint.physicsBody?.categoryBitMask = PhysicsCategory.touchlocation
touchpoint.physicsBody?.contactTestBitMask = PhysicsCategory.RedSquare
touchpoint.physicsBody?.affectedByGravity = false
touchpoint.xScale = 0.5
touchpoint.yScale = 0.5
self.addChild(touchpoint)
let width = UInt32(self.frame.size.width)
let X = arc4random() % width
ground = SKSpriteNode(imageNamed: "Ground")
ground.setScale(1.0)
ground.position = CGPoint(x: self.frame.width / 2, y: 5)
ground.physicsBody = SKPhysicsBody(rectangleOfSize: ground.size)
ground.physicsBody?.affectedByGravity = false
ground.physicsBody?.dynamic = false
ground.zPosition = 3
self.addChild(ground)
//INizialize
animator = UIDynamicAnimator(referenceView: self.view!)
//Add Gravity
//animator?.addBehavior(gravity, sprite)
var test = arc4random() % 90
blueSquare.size = CGSize(width: 100, height: 100)
blueSquare.position = CGPoint(x: CGFloat(X), y: 1000)
blueSquare.zRotation = 34
blueSquare.name = "bluecube"
blueSquare.physicsBody = SKPhysicsBody(circleOfRadius: 20)
blueSquare.physicsBody?.affectedByGravity = true
blueSquare.physicsBody?.dynamic = false
blueSquare.color = SKColor.blueColor()
// BlueSquare.physicsBody?.velocity = CGVectorMake(0, 0)
//BlueSquare.physicsBody?.applyImpulse(CGVectorMake(0, -90))
self.addChild(blueSquare)
let X2 = arc4random() % width
redSquare.size = CGSize(width: 100, height: 100)
redSquare.position = CGPoint(x: CGFloat(X2), y: 1000)
redSquare.name = "redcube"
redSquare.physicsBody = SKPhysicsBody(circleOfRadius: 20)
redSquare.physicsBody?.affectedByGravity = true
redSquare.physicsBody?.dynamic = true
redSquare.hidden = false
redSquare.physicsBody?.categoryBitMask = PhysicsCategory.RedSquare
redSquare.physicsBody?.contactTestBitMask = PhysicsCategory.touchlocation
redSquare.color = SKColor.redColor()
self.addChild(redSquare)
let timerAction1 = SKAction.waitForDuration(0.5)
let timerAction2 = SKAction.runBlock(spawning1)
let timerSequence = SKAction.sequence([timerAction1, timerAction2])
runAction(SKAction.repeatActionForever(timerSequence))
}
func didBeginContact(contact: SKPhysicsContact) {
var firstBody : SKPhysicsBody = contact.bodyA
var secondBody : SKPhysicsBody = contact.bodyB
print("didbegincontact")
if ((firstBody.categoryBitMask == PhysicsCategory.RedSquare) && (secondBody.categoryBitMask == PhysicsCategory.touchlocation)) || ((firstBody.categoryBitMask == PhysicsCategory.touchlocation) && (secondBody.categoryBitMask == PhysicsCategory.RedSquare)) {
collisionwithredsquare(firstBody.node as! SKSpriteNode)
print("Done")
}
}
func collisionwithredsquare(redsquare: SKSpriteNode) {
print("Hello")
}
func spawning1() {
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
/* Called when a touch begins */
for touch in touches {
let location = touch.locationInNode(self)
touchpoint.position = location
}
}
func score () {
scorenumber++
print(scorenumber)
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
if CGRectIntersectsRect(redSquare.frame, ground.frame) {
redSquare.position = CGPoint(x: redSquare.position.x, y: redSquare.position.y + 10)
}
}
}
提前致谢，Niall
答案 0 :(得分：1)
您的碰撞类别是错误的。这应该是因为你正在处理32位整数。
struct PhysicsCategory {
static let RedSquare: UInt32 = 0x1 << 1
static let touchlocation : UInt32 = 0x1 << 2
static let BlueSquare : UInt32 = 0x1 << 3
}
如果按照自己的方式使用，就必须像这样写
struct PhysicsCategory {
static let RedSquare: UInt32 = 1
static let touchlocation : UInt32 = 2
static let BlueSquare : UInt32 = 4
static let somethingElse : UInt32 = 8
}
这更令人困惑，因为你不能只将最后一个数字增加1.
将碰撞代码更改为此。这样你就不必在if语句中检查这两个实体。
/// Did Begin Contact
func didBeginContact(contact: SKPhysicsContact) {
var firstBody: SKPhysicsBody
var secondBody: SKPhysicsBody
if contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask {
firstBody = contact.bodyA
secondBody = contact.bodyB
} else {
firstBody = contact.bodyB
secondBody = contact.bodyA
}
if (firstBody.categoryBitMask == PhysicsCategory.RedSquare) && (secondBody.categoryBitMask == PhysicsCategory.touchlocation) {
collisionwithredsquare(firstBody.node) // I aim pretty sure you dont need to cast as SKSpriteNod, because the body its already a SKNode.
print("Done")
}
}
同样在touchLocaiton精灵上你忘了给它一个物理身体。
touchpoint.pysicsBody = SKPhysicsBody(..) // FORGOT THIS LINE
touchpoint.physicsBody?.categoryBitMask = PhysicsCategory.touchlocation
touchpoint.physicsBody?.contactTestBitMask = PhysicsCategory.RedSquare
touchpoint.physicsBody?.affectedByGravity = false
如果您已经获得要调用的联系方法，现在应该可以使用。让我知道它是怎么回事。