SKSpriteNodes in SKView

Question

I am trying to get all the SKSpriteNodes in my SKView to change their alpha. Here's my code:

if let nodes = self.gameSKView.scene!.children as? [SKSpriteNode] {
        for node in nodes {
            if node.name != "bg" {
                node.alpha = 0
            }
        }
}

With those codes, the nodes is always nil but when I print what in my gameSKView it is not nil.

println("\(self.gameSKView.scene!.children)")

Can anyone try to help me? Thanks in advance.

use sprite kits node enumeration, see sk programming guide – CodeSmile Nov 11 '14 at 09:01 — CodeSmile, Nov 11 '14 at 09:01

score 0 · Accepted Answer · answered Nov 11 '14 at 06:26

0

self.gameSKView.scene!.children as? [SKSpriteNode]

is non-null if all the children are SKSpriteNode - as? is not a filter to select elements of a particular type, it's a type-safe "cast".

I's very difficult to provide any advice how to do what you want without knowing what you want to accomplish and more of the code.

answered Nov 11 '14 at 06:26

molbdnilo

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I casted it with "as? [SKSpriteNode]" because I know that all the children in my gameSKView is SKSpriteNode. I want to change the alpha of each node in my gameSKView. Now i want is the proper way because apparently, nodes variable is null – Apple Ramos Nov 11 '14 at 06:40

SKSpriteNodes in SKView

1 Answers1