Question

我有一个游戏，我似乎无法让节点在x位置随机产生，它会随机产生，但通常会离开屏幕，然后游戏无用而且必须重新启动它：

func addEnemy () {
    //enemy
    let minValue = self.size.width / 8;
    let maxValue = self.size.width-20;
    let spawnPoint = UInt32(maxValue - minValue);

    Enemy = SKSpriteNode(imageNamed: "Enemy")
    Enemy.size = CGSize(width: 150, height: 200)

    Enemy.position = CGPoint(x: CGFloat(arc4random_uniform(spawnPoint)), y: self.size.height)
    self.addChild(Enemy)
}

Answer 1

let min: CGFloat = 15.0
let max: CGFloat = 200.0
let randomCGFloatBetweenMinAndMax = CGFloat(rand())/CGFloat(RAND_MAX)*(max-min)+min

或者如果您愿意

let randomCGFloatBetweenMinAndMax2 = CGFloat(arc4random_uniform(UInt32(max-min)) + UInt32(min))

在x位置随机生成SKNode？

1 个答案: