ios - Spritekit 游戏中的无尽滚动(重复)背景 - Swift

Question

我想为我的 spritekit 游戏创建一个无限滚动的背景，它可能应该由一两个图像组成，哪些图像会重复？我找到了这些 one和 two示例，但它们在 obj. C、

我不知道如何在 Swift 中实现这一点。是否可以手动设置速度？

Ps:我没有转换obj的技能。 C 到 swift(Xcode 开发新手)

Answer 1

我知道这对游戏来说已经晚了，但我也找到了如何在水平方向上做到这一点!

从 Egg​​head 的代码开始(出色的工作!)我修改了一些东西:

    let background1 = SKSpriteNode(imageNamed: "Street_Example")
    let background2 = SKSpriteNode(imageNamed: "Street_Example")

还有:

    background1.position = CGPoint(x: frame.size.width / 2, y:frame.size.height / 2)
    background1.size = CGSize(width: frame.width, height: frame.height)
    background1.anchorPoint = CGPointZero
    background1.position = CGPointMake(0, 0)
    background1.zPosition = -15
    self.addChild(background1)

    background2.size = CGSize(width: frame.width, height: frame.height)
    background2.anchorPoint = CGPointZero
    background2.position = CGPointMake(background1.size.width - 1,0)
    background2.zPosition = -15
    self.addChild(background2)

并更新背景的位置:

    background1.position = CGPointMake(background1.position.x-2, background1.position.y)
    background2.position = CGPointMake(background2.position.x-2, background2.position.y)
    if(background1.position.x < -background1.size.width)
    {
      background1.position = CGPointMake(background1.position.x + background2.size.width , background2.position.y)
    }
    if(background2.position.x < -background2.size.width)
    {
      background2.position = CGPointMake(background2.position.x + background1.size.height, background1.position.y) 
    }