无法更改SKView backgroundColor

Question

这是iOS 9。我无法设置SKView的背景色，它总是以默认的灰色呈现。有办法绕道吗？

let frame = CGRect(x: 0, y: 0, width: 200, height: 100)
let spriteView = SKView(frame: frame)
spriteView.backgroundColor = .blueColor()
self.view.addSubview(spriteView)

当运行上述代码时，SKView是灰色的，而不是蓝色的。我真正想要做的是设置allowsTransparency = true，但如果不能将背景色更改为clearColor，则无法使其工作。

还有人碰到这个吗？有什么解决办法吗？

更新

即使有了@Danilo的建议，这仍然显示为灰色：

let frame = CGRect(x: 0, y: 0, width: 200, height: 100)
let spriteView = SKView(frame: frame)
spriteView.backgroundColor = .clearColor()
spriteView.allowsTransparency = true
spriteView.opaque = false

更新

显然，设置backgroundColor的SKView没有效果，但是如果您将其设置为任何东西，那么allowsTransparency = true就无法工作。

Answer 1

除了添加一个SKView之外，我们还需要一个由SKView表示的SKScene；然后调整/更改SKScene的backgroundColor。反过来，一个节点将被添加到场景中。

例如：

//create a SKView, which takes up the same frame as our view
let spriteView = SKView(frame: self.view.bounds)

//adding spriteView as a child view of our view
self.view.addSubview(spriteView)

//Here, we create a scene, which is the root object of
//the graph
let scene = SKScene(size: spriteView.frame.size)
scene.backgroundColor = .orangeColor()

//As said, we present the scene with our SKView
spriteView.presentScene(scene)

//Here, we create a node, which will be added by our scene
//This node takes up a size that you originally created and has the 
//background color set to blue
let nodeFrame = CGRect(x: 0, y: 0, width: 200, height: 100)
let node = SKSpriteNode(color: .blueColor(), size: nodeFrame.size)

//The following just serves to show how we can adjust the node's   
//position; I will leave that to you
node.position = CGPointMake(scene.frame.size.width - 200, scene.frame.size.height - 100)

//Finally, we add the node to our scene
scene.addChild(node)

Answer 2

    let spriteView = SKView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
    let spriteKitScene = SKScene(size: spriteView.frame.size)
    spriteKitScene.backgroundColor = SKColor.blackColor()
    spriteView.presentScene(spriteKitScene)
    self.view.addSubview(spriteView)