無法更改 SKView backgroundColor

Question

這是 iOS 9。我無法設置 SKView 的背景顏色，它總是以默認灰色呈現。 有沒有辦法解決這個問題？

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

當上面的代碼運行時，SKView 是灰色而不是藍色。 我真正想要做的是設置allowsTransparency = true但如果我不能將背景顏色更改為clearColor我就無法clearColor 。

還有其他人遇到這個嗎？ 任何解決方法？

更新

即使有@Danilo 的建議，這仍然顯示為灰色：

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

顯然，設置 SKView 的backgroundColor沒有效果，但是如果您將其設置為任何內容，則allowsTransparency = true不起作用。

Answer 1

除了添加SKView ，我們還需要一個SKScene由SKView呈現； 我們再調整/改變backgroundColor中的SKScene 。 反過來，場景將添加一個節點。

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)