SpriteKit，Swift 2.0 - 通过按钮启动场景时缺少 ScrollView

Question

我最近在我的 GameViewController 中实现了一个 scrollView，它工作得非常好，但我看到的教程只有一个场景，即启动场景 (GameScene)，而不是我将要成为的单独场景调用 "Menu" 所以我设法让它启动菜单场景而不是常规的 "GameScene" 但是当我使用我在 GameScene 中实现的按钮从 GameScene 转到菜单场景时，滚动视图不起作用，但它确实显示了图片，但我无法滚动浏览它们。

我的问题是，当我使用按钮（在 GameScene 中）转到菜单场景时，如何让 scrollView 工作？

这是按钮（在 GameScene 中）

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

    let touch: UITouch = touches.first!
    let location: CGPoint = touch.locationInNode(self)
    let node: SKNode = self.nodeAtPoint(location)


    if (node == menubutton) {

        let MenuScene = Menu(size: self.size, viewController: viewController)
        let transition = SKTransition.flipVerticalWithDuration(0.5)
        MenuScene.scaleMode = SKSceneScaleMode.AspectFill
        self.scene!.view?.presentScene(MenuScene, transition: transition) 

}

这是我的菜单场景：

import Foundation
import SpriteKit


let kMargin: CGFloat = 40

var backButton = SKSpriteNode()
var selectButton = SKSpriteNode()


class Menu: SKScene {

    let world2 = SKSpriteNode()

private var imageSize = CGSize.zero

private weak var viewController: GameViewController?


init(size: CGSize, viewController: GameViewController?) {
    self.viewController = viewController
    super.init(size: size)
}

required init?(coder aDecoder: NSCoder) {
    assert(false, "Use init(size:viewController:)")

    super.init(coder: aDecoder)
}


override func didMoveToView(view: SKView) {
    physicsWorld.gravity = CGVector.zero

    imageSize = SKSpriteNode(imageNamed: "card_level01").size

    let initialMargin = size.width/2
    let marginPerImage = kMargin + imageSize.width

    world2.size = CGSize(width: initialMargin*2 + (marginPerImage * 7), height: size.height)
    addChild(world2)

    for i in 1...8 {
        let sprite = SKSpriteNode(imageNamed: String(format: "card_level%02d", i))
        sprite.position = CGPoint(x: initialMargin + (marginPerImage * (CGFloat(i) - 1)), y: size.height / 2)
        world2.addChild(sprite)

    }
}

override func update(currentTime: NSTimeInterval) {
    viewController?.applyScrollViewToSpriteKitMapping()
}

这是我的 GameViewController

import UIKit
import SpriteKit

class GameViewController: UIViewController {

var scrollView: UIScrollView!
var contentView: UIView!

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()

    let skView = view as! SKView

    if (skView.scene === Menu.self) {

        skView.showsFPS = true
        skView.showsNodeCount = true

        skView.ignoresSiblingOrder = true

        let scene = Menu(size: skView.bounds.size, viewController: self)
        scene.scaleMode = .AspectFill

        skView.presentScene(scene)

        scrollView = UIScrollView(frame: self.view.bounds)
        scrollView.delegate = self
        scrollView.contentSize = scene.world2.frame.size
        view.addSubview(scrollView)

        contentView = UIView(frame: CGRect(origin: CGPoint.zero, size: scene.world2.size))
        contentView.backgroundColor = UIColor.greenColor().colorWithAlphaComponent(0.2)
        scrollView.addSubview(contentView)

        applyScrollViewToSpriteKitMapping()

    }
}

func applyScrollViewToSpriteKitMapping() {

    let origin = contentView.frame.origin

    let skPosition = CGPoint(x: -scrollView.contentOffset.x + origin.x, y: -scrollView.contentSize.height + CGRectGetHeight(view.bounds) + scrollView.contentOffset.y - origin.y)


    let skView = view as! SKView
    if let scene = skView.scene as? Menu {
        scene.world2.position = skPosition

    }

}

override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
    if UIDevice.currentDevice().userInterfaceIdiom == .Phone {
        return UIInterfaceOrientationMask.Portrait
    } else {
        return UIInterfaceOrientationMask.All
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Release any cached data, images, etc that aren't in use.
}

override func shouldAutorotate() -> Bool {
    return true
}

override func prefersStatusBarHidden() -> Bool {
    return true
 }

}

extension GameViewController: UIScrollViewDelegate {


}

Answer 1

我最近帮另一个会员解决了类似的问题，看看可能对你有帮助

以我的方式，我将滚动视图子类化，因此可以将它直接添加到 SKScenes 而不是视图控制器。

如果您希望 1 个以上的 SKScene 上的 scrollView 没有重复代码，则需要子类化您的 SKScnenes

 class BaseScene: SKScene ...
 // Add scroll view 

 class Menu: BaseScene...
 class GameScene: BaseScene ...

附带说明一下，您不应该真正在您的 SKScenes 中引用您的 viewController，他们不应该相互了解。

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