ios – Sprite Kit相机在节点上

我做了一个平台游戏,并将相机指向主节点播放器.

我已经通过了可以在这里找到的苹果文档：Apple

大约有6个平台,它们之间有self.frame.size.height / 4.5空格,每次在屏幕顶部的dy = -15时都应该重新生成一个平台,使它成为一个无限循环.

我得到了一个Player节点,每当屏幕被触摸时,它都会得到一个冲动(玩家跳起来).整个游戏只能在y轴上移动.

我创建的摄像机专注于播放器,每当播放器跳转平台向下移动并且播放器向上移动时.但是,这只是视野,而不是现实世界的立场.这意味着,SpawnPlatforms中给定的位置总是相同的,因为它们不移动,只有坚持使用Player的View上下移动.

我想让我的播放器节点上的相机,它在y轴上移动,而在它进一步向上,平台也应该向下移动,只有视图改变,我不能使用更新：重建平台的方法.我该怎么改呢？

编辑：我的代码使用更新：方法中的更新,但这仍然不能回答我的初始问题,如何移动整个世界与相机,不仅相机.

override func didMoveToView(view: SKView) {
    /* Setup your scene here */

    self.physicsWorld.contactDelegate = self
    self.anchorPoint = CGPoint(x: 0,y: 0.30)

    backgroundColor = SKColor(red: 81.0/255.0,green: 192.0/255.0,blue: 201.0/255.0,alpha: 1.0)

    self.World = SKNode()
    self.World.name = "World"
    addChild(World)

    self.Camera = SKNode()
    self.Camera.name = "Camera"
    self.World.addChild(Camera)

    SpawnPlatforms()
    SpawnPlayer()
}

func SpawnPlatforms() {

    Platform0 = SKSpriteNode (color: SKColor.greenColor(),size: CGSize(width: self.frame.size.width,height: 25))
    Platform0.position = CGPoint(x: self.frame.size.width / 2,y: -36)
    Platform0.zPosition = 1

    Platform0.physicsBody = SKPhysicsBody(rectangleOfSize:Platform0.size)
    Platform0.physicsBody?.dynamic = false
    Platform0.physicsBody?.allowsRotation = false
    Platform0.physicsBody?.restitution = 0
    Platform0.physicsBody?.usesPreciseCollisionDetection = true

    Platform0.physicsBody?.categoryBitMask = Platform0Category
    Platform0.physicsBody?.collisionBitMask = PlayerCategory
    Platform0.physicsBody?.contactTestBitMask = PlayerCategory

    World.addChild(Platform0)

    ....//Same code for the other Platforms1-5
    }

    func SpawnPlayer(){

    Player = SKSpriteNode (imageNamed: "Image.png")
    Player.size = CGSize(width: 64,height: 64)
    Player.position = CGPoint(x: self.frame.size.width / 2,y: 0)
    Player.zPosition = 2

    Player.physicsBody = SKPhysicsBody(rectangleOfSize:CGSize(width: 35,height: 50))
    Player.physicsBody?.dynamic = true
    Player.physicsBody?.allowsRotation = false
    Player.physicsBody?.restitution = 0
    Player.physicsBody?.usesPreciseCollisionDetection = true

    Player.physicsBody?.categoryBitMask = PlayerCategory
    Player.physicsBody?.collisionBitMask = Platform0Category
    Player.physicsBody?.contactTestBitMask = Platform0Category | Platform1Category | Platform2Category | Platform3Category | Platform4Category | Platform5Category

    World.addChild(Player)

}

override func didSimulatePhysics() {

    Camera.position = CGPoint(x: Player.position.x,y: Player.position.y)

    self.centerOnNode(Camera!)

}

func centerOnNode(node: SKNode) {

    let cameraPositionInScene: CGPoint = Camera.scene!.convertPoint(Camera.position,fromNode: World)

    World.runAction(SKAction.moveTo(CGPoint(x:World.position.x,y:World.position.y - cameraPositionInScene.y),duration: 1.0))

}

override func update(currentTime: CFTimeInterval) {
    /* Called before each frame is rendered */

    if(Player.position.y > (Platform3.position.y + 30) && Player.position.y < Platform4.position.y){
        Platform1.position = CGPointMake(self.frame.size.width / 2,Platform6.position.y + self.frame.size.height / 4.5)
        Platform1.color = SKColor.redColor()
    }

    ...//Same code for the other Platforms1-5
 }

解决方法

创建一个SKNode,让我们称之为map.添加地图作为这个场景的孩子.您添加每个其他游戏节点作为此地图的一个孩子(平台,播放器等).

然后,移动node.parent,而不是移动地图.这将导致平台始终保持相同的位置,即使您移动相机.

此外,您可以添加游戏菜单到场景,他们不会移动,但地图将.

例如,下一个代码将以线性速度移动update：method中的map：

kScrollScenarioFactor可能就像200.f

-(void)update:(CFTimeInterval)currentTime {
  //Calculating time for realistic scroll speed
  float scrollTime = currentTime - self.lastTime;
  self.lastTime = currentTime;
  self.map.position = CGPointMake(map.position.x - (scrollTime * self.kScrollScenarioFactor),map.position.y);
}

或者如果要根据播放器在update：方法中移动地图,可以查看此方法：

-(void)update:(CFTimeInterval)currentTime {
  //Calculating playerPosition difference
  float diffX = self.lastPlayerPosition.x - self.player.position.x;
  float diffY = self.lastPlayerPosition.y - self.player.position.y;
  self.lastPlayerPosition = self.player.position;

  //Updating map position
  self.map.position = CGPointMake(map.position.x + diffX,map.position.y + diffY);
}