swift - How to access a method in SKScene From UIViewController -

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i show uialertcontroller() using nsnotificationcenter skscene.

then when 1 of options clicked execute method in skscene(). method add node, if use

let s = gamescene() s.methodname()

this doesnt use current reference, creat new scene , node not added

if pass scene when sending notification so

nsnotificationcenter.defaultcenter().postnotificationname("detectnot", object: self);

after given option chosen , method execute gives error, there no info error

send notification this

nsnotificationcenter.defaultcenter().postnotificationname("detectnot", object: self);

in uiviewcontroller method

let _scene = notification.object as! gamescene

then can access method


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