Question

我的应用包含两个场景。 Playscene.swift和gamescene.swift。

从gamescene过渡到playcene（玩游戏的地方）完美无缺。然而，一旦达到游戏结束，我就会出现一个“重播”按钮，允许用户返回到gamescene.swift。在转换回来时，它崩溃并出现错误“尝试添加已有父级的SKNode”。是否有正确的方法转换回主屏幕或重新启动游戏，所以我没有收到错误？谢谢你的帮助!!

if self.nodeAtPoint(touchLocation) == self.replay {

        let scene = GameScene(size: self.size)
        let skView = self.view as SKView!
        scene.size = skView.bounds.size

        self.view?.presentScene(scene)

        let transition = SKTransition.crossFadeWithDuration(1.0)
        transition.pausesOutgoingScene = false
        skView.presentScene(scene, transition: transition)

    }

}

Gamescene.swift错误：

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Attemped to add a SKNode which already has a parent: <SKLabelNode> name:'(null)' text:'Highscore:' fontName:'Avenir-Black' position:{344, 549}'

***首先抛出调用堆栈：

Answer 1

我觉得自己很蠢。我添加了一个断点并没有引起注意。可以安全地说出睡觉的时间。

Answer 2

您试图两次呈现相同的场景：

self.view?.presentScene(scene)

skView.presentScene(scene, transition: transition)

也许你不想这样做：

if self.nodeAtPoint(touchLocation) == self.replay {

    let skView = self.view as SKView!
    let scene = GameScene(size: skView.bounds.size)
    // Might also work with the following line instead :
    // let scene = GameScene(size: self.frame.size)

    let transition = SKTransition.crossFadeWithDuration(1.0)
    transition.pausesOutgoingScene = false

    self.view?.presentScene(scene, transition: transition)

}

Answer 3

您可能在GameScene class之外声明SKLabelNode，使SKLabelNode成为全局，您应该在类中声明它，以便在scene A转换为scene B时它死亡。

转换回gamescene.swift会导致错误＆＃34;＆＃39;尝试添加已经拥有父级的SKNode＆＃34;

3 个答案: