为什么我的第二个视图在转换后没有加载？

Question

我有两个视图，第一个工作正常，第二个是我从第一个视图上的按钮转换到它后尝试显示的。

但是，当我单击按钮时，发生转换并且屏幕变为空白。

下面是 UIViewController class 里面的 viewDidLoad 第二个视图。

还有当它击中

let sKView = view as! SKVIEW

它吐出的线

Could not cast value of type 'UIView' (0x10a313eb0) to 'SKView' (0x1094d5718).
(lldb)

如何让它显示视图？

class PlayViewController: UIViewController {

    var scene2: PlayScene!

override func viewDidLoad() {
    super.viewDidLoad()

    let skView = view as! SKView
    skView.showsFPS = true
    skView.showsNodeCount = true

    scene2 = PlayScene(size: skView.bounds.size)

    skView.ignoresSiblingOrder = true

    /* Set the scale mode to scale to fit the window */
    scene2.scaleMode = .AspectFill

    skView.presentScene(scene2)
}

第一class

class GameViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    if let scene = GameScene.unarchiveFromFile("GameScene") as? GameScene {
        // Configure the view.
        let skView = self.view as! SKView
        skView.showsFPS = true
        skView.showsNodeCount = true

        /* Sprite Kit applies additional optimizations to improve rendering performance */
        skView.ignoresSiblingOrder = true

        /* Set the scale mode to scale to fit the window */
        scene.scaleMode = .AspectFill

        skView.presentScene(scene)
    }
}

第二幕

import SpriteKit

class PlayScene: SKScene {
    override func didMoveToView(view: SKView) {
        /* Setup your scene here */
        let myLabel = SKLabelNode(fontNamed:"Chalkduster")
        myLabel.text = "SCENE 2!";
        myLabel.fontSize = 65;
        myLabel.position = CGPoint(x:CGRectGetMidX(self.frame), y:CGRectGetMidY(self.frame));

        self.addChild(myLabel)
    }

    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
        /* Called when a touch begins */

        for touch in (touches as! Set<UITouch>) {
            let location = touch.locationInNode(self)

            let sprite = SKSpriteNode(imageNamed:"Spaceship")

            sprite.xScale = 0.5
            sprite.yScale = 0.5
            sprite.position = location

            let action = SKAction.rotateByAngle(CGFloat(M_PI), duration:1)

            sprite.runAction(SKAction.repeatActionForever(action))

            self.addChild(sprite)
        }
    }

    override func update(currentTime: CFTimeInterval) {
        /* Called before each frame is rendered */
    }
}

Answer 1

我不确定您要归档什么，您可以尝试将超级 class 从 UIViewController 更改为 SpriteViewController 或者您可以创建一个新的 SKView并附加到您的视图。

您不能将 UIView 向下转换为 SKView，因为 SKView 继承自 UIView，如您在 apple documentation

中所见

Inherits From
  NSObject
    UIResponder
      UIView
        SKView

Answer 2

问题是您的视图控制器视图是您日常使用的运行工厂 UIView 而不是 SKView。假设您使用的是故事板，请单击视图控制器，然后单击视图并将 class 更改为 SKView 而不是 UIView。

希望对您有所帮助。

为什么我的第二个视图在转换后没有加载？

why isnt my second view loading after transition?

uiviewcontroller

ios

sprite-kit

swift