所以我创建了一个碰撞检测器功能，它在检测到碰撞时重新启动玩家对象路径。 我正在试图找出如何恢复该路径 - 从玩家对象击中的点再次开始路径。 我应该采用什么方法来实现这一目标？
import SpriteKit
class GameScene: SKScene, SKPhysicsContactDelegate {
var player = SKSpriteNode()
var bg = SKSpriteNode()
var topBoarder = SKSpriteNode()
var bottomBoarder = SKSpriteNode()
var rightBoarder = SKSpriteNode()
var leftBoarder = SKSpriteNode()
// Created a startPosition for my objects path.
let startPosition = CGPointMake(30, 30)
// The default value is 0, which means the game is not active.
var pathRunning = 0
// Defining different groups to be able to make them interact.
let boarderLineGroup:UInt32 = 1
let playerGroup:UInt32 = 2
// The functions that defines what will happen when doing swipes
// in the different directions.
// The player.removeActionForKey("trailRunning") stops the
// SKAction.repeatActionForever which is the path I created
// for my object. trailRunning is the KeyWord I created to
// manipulate whether the action should continue or not.
// applyImpulse makes it possible to, in this case, swipe the player
// object in a direction.
func swipedRight(sender:UISwipeGestureRecognizer){
player.removeActionForKey("trailRunning")
pathRunning = 0
player.physicsBody?.applyImpulse(CGVectorMake(10, 0))
}
func swipedLeft(sender:UISwipeGestureRecognizer){
player.removeActionForKey("trailRunning")
pathRunning = 0
player.physicsBody?.applyImpulse(CGVectorMake(-10, 0))
}
func swipedUp(sender:UISwipeGestureRecognizer){
player.removeActionForKey("trailRunning")
pathRunning = 0
player.physicsBody?.applyImpulse(CGVectorMake(0, 10))
}
func swipedDown(sender:UISwipeGestureRecognizer){
player.removeActionForKey("trailRunning")
pathRunning = 0
player.physicsBody?.applyImpulse(CGVectorMake(0, -10))
}
override func didMoveToView(view: SKView) {
/* Setup your scene here */
self.physicsWorld.gravity = CGVectorMake(0, 0)
self.physicsWorld.contactDelegate = self
// Making swipes possible.
var swipeRight:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedRight:"))
swipeRight.direction = .Right
view.addGestureRecognizer(swipeRight)
var swipeLeft:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedLeft:"))
swipeLeft.direction = .Left
view.addGestureRecognizer(swipeLeft)
var swipeUp:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedUp:"))
swipeUp.direction = .Up
view.addGestureRecognizer(swipeUp)
var swipeDown:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedDown:"))
swipeDown.direction = .Down
view.addGestureRecognizer(swipeDown)
// Adding background.
var bgTexture = SKTexture(imageNamed: "bg")
bg = SKSpriteNode(texture: bgTexture)
bg.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame))
bg.size.height = self.frame.height
bg.size.width = self.frame.width
bg.zPosition = 1
self.addChild(bg)
// Adding boarder lines
var topBoarderTexture = SKTexture(imageNamed: "topBoarder")
topBoarder = SKSpriteNode(texture: topBoarderTexture)
topBoarderPosition()
topBoarder.physicsBody = SKPhysicsBody(rectangleOfSize: topBoarder.size)
topBoarder.physicsBody?.dynamic = false
topBoarder.physicsBody?.allowsRotation = false
topBoarder.physicsBody?.categoryBitMask = boarderLineGroup
topBoarder.physicsBody?.collisionBitMask = playerGroup
topBoarder.physicsBody?.contactTestBitMask = playerGroup
topBoarder.zPosition = 2
self.addChild(topBoarder)
var bottomBoarderTexture = SKTexture(imageNamed: "bottomBoarder")
bottomBoarder = SKSpriteNode(texture: bottomBoarderTexture)
bottomBoarder.position = CGPoint(x: CGRectGetMidX(self.frame), y: 5)
bottomBoarder.physicsBody = SKPhysicsBody(rectangleOfSize: bottomBoarder.size)
bottomBoarder.physicsBody?.dynamic = false
bottomBoarder.physicsBody?.allowsRotation = false
bottomBoarder.physicsBody?.categoryBitMask = boarderLineGroup
bottomBoarder.physicsBody?.collisionBitMask = playerGroup
bottomBoarder.physicsBody?.contactTestBitMask = playerGroup
bottomBoarder.zPosition = 2
self.addChild(bottomBoarder)
var leftBoarderTexture = SKTexture(imageNamed: "leftBoarder")
leftBoarder = SKSpriteNode(texture: leftBoarderTexture)
leftBoarder.position = CGPoint(x: 5, y: CGRectGetMidY(self.frame))
leftBoarder.physicsBody = SKPhysicsBody(rectangleOfSize: leftBoarder.size)
leftBoarder.physicsBody?.dynamic = false
leftBoarder.physicsBody?.allowsRotation = false
leftBoarder.physicsBody?.categoryBitMask = boarderLineGroup
leftBoarder.physicsBody?.collisionBitMask = playerGroup
leftBoarder.physicsBody?.contactTestBitMask = playerGroup
leftBoarder.zPosition = 2
self.addChild(leftBoarder)
var rightBoarderTexture = SKTexture(imageNamed: "rightBoarder")
rightBoarder = SKSpriteNode(texture: rightBoarderTexture)
rightBoarderPosition()
rightBoarder.physicsBody = SKPhysicsBody(rectangleOfSize: rightBoarder.size)
rightBoarder.physicsBody?.dynamic = false
rightBoarder.physicsBody?.allowsRotation = false
rightBoarder.physicsBody?.categoryBitMask = boarderLineGroup
rightBoarder.physicsBody?.collisionBitMask = playerGroup
rightBoarder.physicsBody?.contactTestBitMask = playerGroup
rightBoarder.zPosition = 2
self.addChild(rightBoarder)
// Adding player.
var playerTexture = SKTexture(imageNamed: "player")
player = SKSpriteNode(texture: playerTexture)
player.position = startPosition
// Defining the PhysicsBody, so I will be able to
// make collision detection. The density will make it
// possible for me to use something as applyForce().
player.physicsBody = SKPhysicsBody(rectangleOfSize: player.size)
player.physicsBody?.dynamic = true
player.physicsBody?.density = 1.0
player.physicsBody?.allowsRotation = false
player.physicsBody?.categoryBitMask = playerGroup
player.physicsBody?.collisionBitMask = boarderLineGroup
player.physicsBody?.contactTestBitMask = boarderLineGroup
player.zPosition = 10
self.addChild(player)
}
func didBeginContact(contact: SKPhysicsContact) {
if contact.bodyA.categoryBitMask == boarderLineGroup || contact.bodyB.categoryBitMask == boarderLineGroup {
println(">> Contact <<")
if pathRunning == 0 {
playerPath()
pathRunning = 1
}
}
}
// playerPath is a function I made so that the path will be
// the same on every iPhone size.
func playerPath() {
if frame.height == 480 {
var movePlayerToBottomRight = SKAction.moveTo(CGPointMake(290,30), duration: 1.5)
var movePlayerToTopRight = SKAction.moveTo(CGPointMake(290,450), duration: 2.5)
var movePlayerToTopLeft = SKAction.moveTo(CGPointMake(30,450), duration: 1.5)
var movePlayerToStartPosition = SKAction.moveTo(startPosition, duration: 2.5)
var playerTrail = SKAction.repeatActionForever(SKAction.sequence([movePlayerToBottomRight, movePlayerToTopRight, movePlayerToTopLeft, movePlayerToStartPosition]))
player.runAction(playerTrail, withKey: "trailRunning")
} else if frame.height == 568 {
var movePlayerToBottomRight = SKAction.moveTo(CGPointMake(290,30), duration: 1.5)
var movePlayerToTopRight = SKAction.moveTo(CGPointMake(290,538), duration: 2.5)
var movePlayerToTopLeft = SKAction.moveTo(CGPointMake(30,538), duration: 1.5)
var movePlayerToStartPosition = SKAction.moveTo(startPosition, duration: 2.5)
var playerTrail = SKAction.repeatActionForever(SKAction.sequence([movePlayerToBottomRight, movePlayerToTopRight, movePlayerToTopLeft, movePlayerToStartPosition]))
player.runAction(playerTrail, withKey: "trailRunning")
} else if frame.height == 667 {
var movePlayerToBottomRight = SKAction.moveTo(CGPointMake(345,30), duration: 1.5)
var movePlayerToTopRight = SKAction.moveTo(CGPointMake(345,637), duration: 2.5)
var movePlayerToTopLeft = SKAction.moveTo(CGPointMake(30,637), duration: 1.5)
var movePlayerToStartPosition = SKAction.moveTo(startPosition, duration: 2.5)
var playerTrail = SKAction.repeatActionForever(SKAction.sequence([movePlayerToBottomRight, movePlayerToTopRight, movePlayerToTopLeft, movePlayerToStartPosition]))
player.runAction(playerTrail, withKey: "trailRunning")
} else if frame.height == 736 {
var movePlayerToBottomRight = SKAction.moveTo(CGPointMake(384,30), duration: 1.5)
var movePlayerToTopRight = SKAction.moveTo(CGPointMake(384,706), duration: 2.5)
var movePlayerToTopLeft = SKAction.moveTo(CGPointMake(30,706), duration: 1.5)
var movePlayerToStartPosition = SKAction.moveTo(startPosition, duration: 2.5)
var playerTrail = SKAction.repeatActionForever(SKAction.sequence([movePlayerToBottomRight, movePlayerToTopRight, movePlayerToTopLeft, movePlayerToStartPosition]))
player.runAction(playerTrail, withKey: "trailRunning")
}
}
func topBoarderPosition() {
if frame.height == 480 {
topBoarder.position = CGPoint(x: CGRectGetMidX(self.frame), y: 475)
} else if frame.height == 568 {
topBoarder.position = CGPoint(x: CGRectGetMidX(self.frame), y: 563)
} else if frame.height == 667 {
topBoarder.position = CGPoint(x: CGRectGetMidX(self.frame), y: 662)
} else if frame.height == 736 {
topBoarder.position = CGPoint(x: CGRectGetMidX(self.frame), y: 731)
}
}
func rightBoarderPosition() {
if frame.height == 480 {
rightBoarder.position = CGPoint(x: 315, y: CGRectGetMidY(self.frame))
} else if frame.height == 568 {
rightBoarder.position = CGPoint(x: 315, y: CGRectGetMidY(self.frame))
} else if frame.height == 667 {
rightBoarder.position = CGPoint(x: 370, y: CGRectGetMidY(self.frame))
} else if frame.height == 736 {
rightBoarder.position = CGPoint(x: 409, y: CGRectGetMidY(self.frame))
}
}
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
/* Called when a touch begins */
// Here I tell that I have to press to start the game.
if pathRunning == 0 {
playerPath()
// pathRunning set to 1 to show that the game is now active.
pathRunning = 1
}
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
}
}