Question

我想知道是否可以同时在屏幕上显示两个相同的精灵。我的问题是云。我有两个云精灵在屏幕上移动。 Cloud1和Cloud2。当第一个Cloud1位于屏幕中间时，我想要另一个Cloud1生成。此外，我希望第一个Cloud1在到达屏幕末尾后被删除。这可能是使用精灵还是我需要使用纹理？

   override func update(currentTime: CFTimeInterval) {

   var moveCloud1 = SKAction.moveByX(-CGRectGetMidX(self.frame)*3, y:0, duration: 45)
   var moveCloud2 = SKAction.moveByX(-CGRectGetMidX(self.frame)*3, y:0, duration: 60)

   if(cloudSprite1.frame.origin.x < self.frame.size.width/2){
    let cloudSprite1a = SKSpriteNode(texture: cloudTexture1)
    self.addChild(cloudSprite1a)
    cloudSprite1a.position = CGPoint(x:CGRectGetMidX(self.frame)*2.4,   y:CGRectGetMidY(self.frame)*1.8);
    cloudSprite1a.size = CGSize(width: 75, height: 60)

    cloudSprite1a.runAction(moveCloud1)

   }
   }

self.addCloudSprite1(CGPointMake(100, 500))
    self.addCloudSprite2(CGPointMake(100, 300))




}





func addCloudSprite1(position : CGPoint)
{

    cloudSprite1a.position = CGPoint(x:CGRectGetMidX(self.frame)*2.4, y:CGRectGetMidY(self.frame)*1.8);
    self.addChild(cloudSprite1a)

    var moveCloud1 = SKAction.moveByX(-CGRectGetMidX(self.frame)*2.8, y:0, duration: 40)
    cloudSprite1a.runAction(moveCloud1, completion: { () -> Void in
        cloudSprite1a.removeFromParent()
        self.addCloudSprite1(position)
    })
}

func addCloudSprite2(position : CGPoint)
{

    cloudSprite2a.position = CGPoint(x:CGRectGetMidX(self.frame)*2.4, y:CGRectGetMidY(self.frame)*1.5);
    cloudSprite2a.size = CGSize(width: 75, height: 60)
    self.addChild(cloudSprite2a)

    var moveCloud2 = SKAction.moveByX(-CGRectGetMidX(self.frame)*2.6, y:0, duration: 60)
    cloudSprite2a.runAction(moveCloud2, completion: { () -> Void in
        cloudSprite2a.removeFromParent()
        self.addCloudSprite2(position)
    })
}

Answer 1

您可以将cloud1和cloud2加载为textures并将其设置为SpriteNodes并根据需要重复使用相同的纹理。

override func didMoveToView(view: SKView) {
    let cloudTexture1 = SKTexture(imageNamed: "cloud1.png")
    let cloudSprite1 = SKSpriteNode(texture: cloudTexture1)
    cloudSprite1 // positioned in middle.
    let cloudSprite2 = SKSpriteNode(texture: cloudTexture1)
    cloudSprite1 // positioned in at starting.
}

您可以在更新功能中进行边界检查以添加新的云精灵。

override func update(currentTime: CFTimeInterval) {

    if (self.cloudSprite1.position.x < - self.cloudSprite1.size.width)
    {
        cloudSprite1.position = //The other end.
    }
    if (self.cloudSprite2.position.x < -self.cloudSprite2.size.width)
    {
        cloudSprite2.position = /The other end.
    }
}

或者，您也可以使用节点的SKAction完成处理程序。

func addCloudSprite(position : CGPoint, delay: NSTimeInterval)
{
    let cloudSprite = SKSpriteNode(color: UIColor.greenColor(), size: CGSizeMake(100, 100))
    cloudSprite.position = position
    self.addChild(cloudSprite)

    var action = SKAction.moveTo(CGPointMake(-cloudSprite.size.width, cloudSprite.position.y), duration: 6)
    var sequence = SKAction.sequence([SKAction.waitForDuration(delay),action])
    cloudSprite.runAction(sequence, completion: { () -> Void in
        cloudSprite.removeFromParent()
        self.addCloudSprite(position,delay:0)
    })
}

override func didMoveToView(view: SKView) {
    self.addCloudSprite(CGPointMake(self.frame.size.width+50, 200),delay: 0)
    self.addCloudSprite(CGPointMake(self.frame.size.width+50 , 500),delay: 3)
}

Answer 2

对于记录，要删除精灵，可以使用此方法执行此操作。

self.removeChildrenInArray([cloudSprite1a])

据我所知，它只能在数组中完成，因此你需要[]标记。

添加和删除精灵

2 个答案:

添加和删​​除精灵

2 个答案:

添加和删除精灵