ios - 尝试在 UIView 中为 SKNode 设置动画

Question

我以编程方式在我的 UIView 中创建了一个 SKView。现在我想在所有方向上为一个新的 SKNodes 设置动画，从中间开始(这有效)取决于通过的 View 。一切正常，除了 SKNode 的结束位置很奇怪。它不是向所有方向射击，而是进入一个角落，远离视野边界。它不应该超出 View 的边界。我正在将 CGPoint 从 View 转换为我的场景。

这是我的代码:

func animateExplosion(sender: UIButton){

    let star = SKSpriteNode(imageNamed: "ExplodingStar")
    let starHeight = sender.frame.height / 3
    star.size = CGSize(width: starHeight, height: starHeight)
    var position = sender.frame.origin
   position = self.sceneScene.convertPoint(fromView: position)
    star.position = position
    let minimumDuration = 1
    let maximumDuration = 2
    let randomDuration = TimeInterval(RandomInt(min: minimumDuration * 100, max: maximumDuration * 100) / 100)
    let fireAtWill = SKAction.move(to: getRandomPosition(view: sender), duration: randomDuration)
    let rotation = SKAction.rotate(byAngle: CGFloat(randomAngle()), duration: Double(randomDuration))
    let fadeOut = SKAction.fadeOut(withDuration: randomDuration)
    let scaleTo = SKAction.scale(to: starHeight * 2, duration: randomDuration)
    let group = SKAction.group([fireAtWill, rotation]) //for testing no fade out or remove parent
    let sequence = SKAction.sequence([group])

    if randomAmountOfExplodingStars > 0{
        randomAmountOfExplodingStars -= 1
        sceneScene.addChild(star)
        star.run(sequence)
        animateExplosion(sender: sender)
    }
}

bug 正确所在的 getRandomPosition:

func getRandomPosition(view: UIView) -> CGPoint{
    let direction = RandomInt(min: 1, max: 4)
    var randomX = Int()
    var randomY = Int()

    if direction == 1{
        randomX = Int(view.frame.width / 2)
        randomY = RandomInt(min: -Int(view.frame.height / 2), max: Int(view.frame.height / 2))
    }
    if direction == 2{
        randomX = RandomInt(min: -Int(view.frame.width / 2), max: Int(view.frame.width / 2))
        randomY = Int(view.frame.height / 2)
    }
    if direction == 3{
        randomX = -Int(view.frame.width / 2)
        randomY = RandomInt(min: -Int(view.frame.height / 2), max: Int(view.frame.height / 2))
    }
    if direction == 4{
        randomX = RandomInt(min: -Int(view.frame.width / 2), max: Int(view.frame.width / 2))
        randomY = -Int(view.frame.height / 2)
    }
    var randomPosition = CGPoint(x: randomX, y: randomY)
    //randomPosition = self.sceneScene.convertPoint(fromView: randomPosition)
    return randomPosition
}

我知道代码看起来很糟糕，但它应该可以解决问题，对吗？传递的 View 是 UIView 内部的 UIButton。 SKView 与 UIView 共享完全相同的约束。动画应该从中间开始，到传递 View 边界的某处结束。

Answer 1

是的，它终于开始工作了。太笨了，我以前没有注意到。发件人将始终是较小的 UIView 内的子级。返回函数很好，但是 SKNode 不应该移动到返回函数，而是移动。

更新代码:

let randomPositionOfSender = getRandomPosition(view: sender)
        let fireAtWill = SKAction.moveBy(x: randomPositionOfSender.x, y: randomPositionOfSender.y, duration: randomDuration)