swift - 在屏幕上以随机位置永远移动 Sprite

Question

我尝试随机移动我的 Sprite (方 block )，但所有 Sprite 都转到相同的位置并“振动”。以随机位置永久移动 Sprite 的最佳方法是什么？

//Make random shape
func makeShape () {

    //Check if have more than 12 shapes
    if shapesamount <= 4 {

        sprite = shape.copy() as! SKShapeNode
        sprite.name = "Shpae \(shapesamount)"

        shapes.addChild(sprite)

        shapesamount += 1

        moveRandom(node: sprite)
    }
}

//Move shape radmonly
func moveRandom (node: SKShapeNode) {

        move = SKAction.move(to: CGPoint(x:CGFloat.random(min: frame.minX, max: frame.maxX), y:CGFloat.random(min: frame.minY
            , max: frame.maxY)), duration: shapespeed)

        node.run(move)
}

override func update(_ currentTime: TimeInterval) {

    // Called before each frame is rendered
    if istouching && !isOver {
        let dt:CGFloat = 1.0/50.0
        let distance = CGVector(dx: touchpoint.x - circle.position.x, dy: touchpoint.y - circle.position.y)
        let velocity = CGVector(dx: distance.dx/dt, dy: distance.dy/dt)
        self.circle.physicsBody!.velocity = velocity
    }

    if isOver == false {
        for nodee in shapes.children {
            moveRandom(node: nodee as! SKShapeNode)
        }
    }
}

}

形状是SKNode

Answer 1

您不断向节点添加移动操作，这就是它振动的原因。您实际上是在每一帧都让它们向各个方向移动。

相反，添加检查以查看是否有任何操作正在运行，如果没有，则更改位置:

  if isOver == false {
        for nodee in shapes.children {
            guard !nodee.hasActions else {continue}
            moveRandom(node: nodee as! SKShapeNode)
        }
    }