swift - 错误 : Could not cast value of type 'Ninjumper.GameScene' to 'SKSpriteNode' when trying to transition

Question

(我仍在快速学习，请耐心等待)。我目前正在尝试编写一个名为“Ninjumper”的简单 2D 平台游戏。我在我的 GameScene 中设置了实际的平台游戏，我目前正在创建一个带有“播放”按钮的主菜单，该按钮会将您带到 GameScene。我的 MenuScene 上只有一个颜色 Sprite (带有纹理“播放按钮”)，我以编程方式将其制作成一个按钮。但是，当单击此按钮时，我的程序崩溃并出现标题中显示的错误。

这是我的 MenuScene 中的代码:

//
//  MenuScene.swift
//  Ninjumper

import SpriteKit

class MenuScene: SKScene {

    var playButton = SKSpriteNode(texture: SKTexture(imageNamed: "playbutton"))

    override func didMove(to view: SKView) {
        addPlayButton()
}

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        for touch in touches {
            let location = touch.location(in: self)
            let touchedNode = atPoint(location)
            if touchedNode.name == "playButton" {
                // Call the function here.
            let scene = GameScene(fileNamed: "GameScene")!
            let transition = SKTransition.moveIn(with: .right, duration: 1)
            self.view?.presentScene(scene, transition: transition)
            }
        }
    }
    func addPlayButton() {
        playButton.position = CGPoint(x: 0, y: -156)
        playButton.name = "playButton"
        playButton.size = CGSize(width: 280.0, height: 100.0)
        playButton.isHidden = false
        addChild(playButton)
    }
}

我想让它在您点击按钮时，场景从 MenuScene 切换到 GameScene。但是，我当前使用的代码会导致错误:无法将“Ninjumper.GameScene”类型的值转换为“SKSpriteNode”。我应该如何解决这个问题？ (或者如果你有其他方法可以制作按钮切换场景，请告诉我)

Answer 1

试试这个。将 touchesBegan 的内容替换为以下内容:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
  for t in touches { self.touchDown(atPoint: t.location(in: self)) }
}

现在创建一个名为 touchDown 的新函数:

func touchDown(atPoint pos : CGPoint) { /* ... */ }

我们新功能的内部:

if playButton.contains(pos) {
  if let scene = GameScene(fileNamed: "GameScene") {
    scene.scaleMode = .aspectFit
    let t = SKTransition.moveIn(with: .right, duration: 1)
    self.view?.presentScene(scene, transition: t)
  }
}

祝你好运!我会关注这个问题，所以如果你遇到同样的问题请告诉我:)