错误:尝试转换时，无法将'Ninjumper.GameScene‘类型的值强制转换为'SKSpriteNode’

Question

(我还在学习swift，请耐心听我说)。我目前正在尝试编写一个简单的2D平台游戏，叫做“忍者”。我已经在我的GameScene中设置了实际的platformer游戏，目前我正在创建一个带有“播放”按钮的主菜单，它会带你进入GameScene。我的MenuScene上只有一个彩色雪碧图(带有纹理"playbutton")，我已经通过编程把它做成了一个按钮。但是，当单击此按钮时，我的程序崩溃，并显示标题中显示的错误。

下面是我的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)
    }
}

我想让它变成这样，当你轻敲按钮时，场景从MenuScene切换到GameScene。但是，我当前使用的代码导致了错误:无法将'Ninjumper.GameScene‘类型的值转换为'SKSpriteNode’。我该如何解决这个问题呢？(或者如果你有其他方法来切换场景，请告诉我)

Answer 1

尝尝这个。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) { /* ... */ }

在我们的新函数中：

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，如果你遇到同样的问题，请告诉我:)