Question

我想要＆＃39; n＆＃39;节点数量不断向各个方向移动。以下是我编码的方式

func spriteCollection(count : Int) -> [SKSpriteNode]{

    var spriteArray = [SKSpriteNode]()

    for _ in 0..<count {
        let sprite = SKSpriteNode(imageNamed: "node.png")

        //giving random position to sprites, 
        let x =  CGFloat(arc4random_uniform(UInt32(((self.scene?.frame.width)! - sprite.size.width))))
        let y = CGFloat(arc4random_uniform(UInt32(((self.scene?.frame.height)! - sprite.size.height))))

        sprite.position = CGPoint(x: x, y: y)
        spriteArray.append(sprite)
    }

    return spriteArray
}


override func didMoveToView(view: SKView) {

    //here if I pass more than 2, the nodes won't even get displayed sometimes
    let spriteCollection = spriteCollection(2)

    for sprite in spriteCollection{

       let blockOFaction = SKAction.runBlock({
            let x =  CGFloat(arc4random_uniform(UInt32(((self.scene?.frame.width)! - sprite.size.width))))
            let y = CGFloat(arc4random_uniform(UInt32(((self.scene?.frame.height)! - sprite.size.height))))
            let action = SKAction.moveTo(CGPoint(x: x , y: y), duration: 2)
            print("moving to \(x,y)")
            action.speed = 3.0
            sprite.runAction(action)

        })
        let waitAction = SKAction.waitForDuration(1)

        sprite.runAction(SKAction.repeatActionForever(SKAction.sequence([blockOFaction, waitAction])))
        addChild(sprite)
    }
}

节点在所有方向上随机移动，但如果我添加超过2个精灵，有时没有可见的精灵（只是一个空白的屏幕），而且我想最终增加精灵的数量。我在做什么，只是传递我想要的精灵数量（最终不能增加）所以还有其他方法可以做到这一点。任何人都可以建议我如何实现这一目标..

我如何制作＆＃39; n＆＃39; SKSpriteNode的数量连续向各个方向移动Swift？

0 个答案: