SceneManager and access to scene variables

Holonist · October 2014

I use SceneManager to manage my scenes.
Is there a way to access a scene initiated by SceneManager from outside?

Here is what I tried.

GameScene.lua:

GameScene = Core.class(Sprite)

function GameScene:init()
self.hello = TextField.new(nil, "hello")
self.hello:setPosition(50,50)
self:addChild(self.hello)
end

main.lua:

sceneManager = SceneManager.new({
["gameScene"] = GameScene
})

stage:addChild(sceneManager)
sceneManager:changeScene("gameScene", SceneManager.fade, 0, easing.outBack)

sceneManager.scenes["gameScene"].hello:setText("changed")

Error message: main.lua:12: attempt to index field 'hello' (a nil value)

ar2rsawseen · October 2014

@Holonist you can only access an instantiated scene (the one that has instance) as in current scene through

if sceneManager.scene1 and sceneManager.scene1.hello then
    sceneManager.scene1.hello:setText("changed")
end

But other scenes might not have instances, so you would only accessing their classes, which won't do you any good

Holonist · October 2014

Thanks.

It works. I was a bit confused about the if-query, because in this simple scenario it is clear that the scene instance exists. But apparently what matters is how you call the scene.

However, thanks again!!

Holonist · October 2014

@ar2rsawseen

I just realized to use scenemanager this way doesn't make any sense, or?
I planned to have a "main scene" (gameScene) where the most important variables are stored and that scene is always active.

But I should rather just store those main variables in the init file

amin13a · October 2014

You can store main variables in a global table in the init file

talis · October 2014

Or you can always pass values between scenes as a paramater in your constructor when you are initiating(creating instance) your scene.

Passing values between scenes:
http://giderosmobile.com/forum/discussion/1474/passing-variables-with-scene-manager/p1

Howdy, Stranger!

Categories

In this Discussion

Top Posters

SceneManager and access to scene variables

Comments

Howdy, Stranger!

Quick Links

Categories

In this Discussion

Top Posters

SceneManager and access to scene variables

Comments