How Do I Blur a Scene in SpriteKit?

Question

How would I add a gaussian blur to all nodes (there\'s no fixed number of nodes) in an SKScene in SpriteKit? A label will be added on top of the scene later, this will be m

Answer 1

This is another example of getting this done in swift 2 without the layers:

func blurWithCompletion() {
let duration: CGFloat = 0.5
let filter: CIFilter = CIFilter(name: "CIGaussianBlur", withInputParameters: ["inputRadius" : NSNumber(double:1.0)])!
scene!.filter = filter
scene!.shouldRasterize = true
scene!.shouldEnableEffects = true
scene!.runAction(SKAction.customActionWithDuration(0.5, actionBlock: { (node: SKNode, elapsedTime: CGFloat) in
    let radius = (elapsedTime/duration)*10.0
    (node as? SKEffectNode)!.filter!.setValue(radius, forKey: "inputRadius")

}))

}