Question

在我的游戏中，我想在调用“endGame”函数时暂停某些事情，而其他事情仍然在运行。我已经能够通过使用“暂停”布尔值来完成大多数操作，但我不能让它适用于我的滚动背景。我知道问题与for循环中如何包含后台操作有关，但我不知道如何解决这个问题。以下是我的代码示例：

class GameScene: SKScene {

var sun = SKSpriteNode()
var background = SKSpriteNode()

override func didMoveToView(view: SKView) {

sun = SKSpriteNode(imageNamed: "Sun")
    sun.zPosition = -2
    sun.setScale(0.8)
    sun.position = CGPoint(x: self.frame.size.width * 0.632, y: self.frame.size.height * 0.90)
    let rotate = SKAction.rotateByAngle(CGFloat(M_PI_2), duration: NSTimeInterval(10))
    let rotateForever = SKAction.repeatActionForever(rotate)
    sun.runAction(rotateForever)
    addChild(sun)

let backgroundTexture = SKTexture(imageNamed: "Background")
    backgroundTexture.filteringMode = .Nearest

    let moveBackground = SKAction.moveByX(-backgroundTexture.size().width, y: 0, duration: NSTimeInterval(0.004 * backgroundTexture.size().width * 2.0))
    let resetBackground = SKAction.moveByX(backgroundTexture.size().width, y: 0, duration: 0.0)
    let moveBackgroundForever = SKAction.repeatActionForever(SKAction.sequence([moveBackground,resetBackground]))

    for var i:CGFloat = 0; i < 4.0 + self.frame.size.width / ( backgroundTexture.size().width ); ++i {
        background = SKSpriteNode(texture: backgroundTexture)
        background.setScale(0.5)
        background.zPosition = -1
        background.position = CGPointMake(i * background.size.width, backgroundVert)
        background.runAction(moveBackgroundForever)
        addChild(background)
    }
}

func endGame {
sun.paused = true
background.paused = true
}
}

在此示例中，“暂停”布尔值适用于旋转的SKSpriteNode，称为“sun”，但它不适用于背景。有什么想法吗？

Answer 1

您应该为背景精灵创建1 SKNode，将所有背景节点添加到此节点，然后将主节点添加到场景中。然后，当您需要暂停时，您只会暂停主节点，然后主节点将暂停其所有子节点

for var i:CGFloat = 0; i < 4.0 + self.frame.size.width / (backgroundTexture.size().width ); ++i {
    var background = SKSpriteNode(texture: backgroundTexture)
    background.setScale(0.5)
    background.zPosition = -1
    background.position = CGPointMake(i * background.size.width, backgroundVert)
    background.runAction(moveBackgroundForever)
    self.background.addChild(background)
}
addChild(background)

Answer 2

看起来你在for循环中创建了多个背景。但你只是暂停一个。

Swift：暂停无尽的滚动背景（即无限循环）

2 个答案: