osx - Getting EXC_BAD_ACCESS in spritekit game in Swift 2.1 -

writting own game in swift using spritekit came on 1 problem seems cannot solve. game i'm writting os x platform (not mobile), using pretty standard code layout:

first here appdelegate:

import cocoa import spritekit  @nsapplicationmain class appdelegate: nsobject, nsapplicationdelegate {     @iboutlet weak var window: nswindow!     @iboutlet weak var skview: skview!      func applicationdidfinishlaunching(anotification: nsnotification)     {         /* pick size scene */         if let scene = mainmenu(filenamed:"mainmenu")         {             scene.size = cgsize(width: 1024, height: 768)             /* set scale mode scale fit window */             scene.scalemode = .aspectfit             scene.backgroundcolor = nscolor.blackcolor()              self.skview!.presentscene(scene)              /* sprite kit applies additional optimizations improve rendering performance */             self.skview!.ignoressiblingorder = true              self.skview!.showsfps = true             self.skview!.showsnodecount = true              window.acceptsmousemovedevents = true         }     }      func applicationshouldterminateafterlastwindowclosed(sender: nsapplication) -> bool     {         return true     } } 

this opens mainmenu scene have many buttons each leads other scenes. buttons have made own subclass of spritekitnode:

    import foundation import spritekit  class button: skspritenode {     var ishighlighted = false     var ispressed = false     var normal: sktexture     var highlighted: sktexture     var pressed: sktexture     var disabled: sktexture     var isdisabled = false      init(normal: sktexture, highlighted: sktexture, pressed: sktexture, disabled: sktexture)     {         self.normal = normal         self.highlighted = highlighted         self.pressed = pressed         self.disabled = disabled         super.init(texture: normal, color: nscolor.clearcolor(), size: normal.size())     }      required init?(coder adecoder: nscoder)     {         normal = sktexture()         highlighted = sktexture()         pressed = sktexture()         disabled = sktexture()         super.init(coder: adecoder)     }      func disablebutton()     {         self.texture = disabled         isdisabled = true     }      func enablebutton()     {         self.texture = normal         isdisabled = false     }      //overrides     override func mouseentered(theevent: nsevent)     {         if !isdisabled         {             ishighlighted = true             self.texture = highlighted         }     }      override func mouseexited(theevent: nsevent)     {         if !isdisabled         {             ishighlighted = false             self.texture = normal         }     }      override func mousedown(theevent: nsevent)     {         if !isdisabled         {             ispressed = true             self.texture = pressed             scene?.mousedown(theevent)         }     }      override func mouseup(theevent: nsevent)     {         if !isdisabled         {             ispressed = false             self.texture = highlighted         }     } } 

and main menu (not complete code) here:

    import spritekit  class mainmenu: skscene {     let quickgame = button(normal: sktexture(imagenamed: "quick"), highlighted: sktexture(imagenamed: "quick-high"), pressed: sktexture(imagenamed: "quick-down"), disabled: sktexture(imagenamed: "quick-dis"))  override func didmovetoview(view: skview)     {         let options = nstrackingareaoptions.mousemoved.union(nstrackingareaoptions.activeinkeywindow)         let trackingarea = nstrackingarea(rect: view.frame, options: options, owner: self, userinfo: nil)         view.addtrackingarea(trackingarea)  let background = skspritenode(imagenamed: "splash")         background.position = cgpoint(x: background.size.width, y: background.size.height)         background.userinteractionenabled = true         background.position = cgpoint.zero         background.anchorpoint = cgpoint.zero         background.zposition = 0         //background.setscale(1.0)         self.addchild(background)          //let background = self.childnodewithname("splash")          //let quickgame = button(normal: textureatlas.texturenamed("quick"), highlighted: textureatlas.texturenamed("quick-high"), pressed: textureatlas.texturenamed("quick-down"))          quickgame.name = "quick game"         quickgame.anchorpoint = cgpoint.zero         quickgame.position = cgpoint(x: 230, y: 97)         quickgame.userinteractionenabled = true         quickgame.zposition = 100         background.addchild(quickgame)  … rest of init here… }  override func mousedown(theevent: nsevent)     {         if newgame.ispressed         {          }         else if quickgame.ispressed         {             if let quickgamescene = quickgame(filenamed: "quickgame")             {                 quickgamescene.scalemode = self.scalemode                 let transition = sktransition.fadewithduration(1.0)                 self.removeallchildren()                 self.removeallactions()                 view?.presentscene(quickgamescene, transition: transition)             }          }         else if quitgame.ispressed         {             nsapp.terminate(self)         }     } } 

i'm getting exc_bad_access thrown when click on quickgame button. click goes ok, new scene shows after second or 2 game crashes , error placed ainside appdelegate class declaration.

i'm suspecting have done wrong placement of call of mousedown inside button class.

what wish accomplish here have event-driven system , when event fires, message sent button scene class don't need iterate on buttons (because in scenes there lot of buttons , pressable/selectable elements), execute code (in current case switch scene).

i have done debugging , after changing scene in mainmenu class debugger went button class, i'm thinking problem lies there switching scenes mainmenenter code hereu instance destroyed along buttons , elements , when code returns button, instance of doesn't exists anymore. i'm not 100% , don't know how solve have jsut started work swift , spritekit.

the found solution on japanesse forum. custom button spritekit in swift

this can used on os x , ios.

the solution problem use protocol on scene class includes button functions , call functions button class via optional delegate (parent scene instance).