ios - Swift 2 Game Main Menu -

i trying implement main menu spritekit game, whenever try present scene blank gray screen. here code right now, presents game , not menu:

class gameviewcontroller: uiviewcontroller {  override func viewdidload() {     super.viewdidload()      if let scene = gamescene(filenamed:"gamescene") {          let skview = self.view as! skview         skview.showsfps = true         skview.showsnodecount = true         skview.showsdrawcount = true          skview.ignoressiblingorder = true          scene.scalemode = skscenescalemode.aspectfill         skview.presentscene(scene)      } } 

i'm new this, , wasn't sure tried replacing gamescene menu scene, gave me gray screen. appreciated.

use code load skscene file created in code , not in scene editor

override func viewwilllayoutsubviews() {      super.viewwilllayoutsubviews()      if let skview = self.view as? skview {          if skview.scene == nil {              let scene = menuscene(size: skview.bounds.size)              skview.showsfps = false             skview.showsnodecount = true             skview.showsphysics = true             skview.ignoressiblingorder = true              scene.scalemode = .aspectfill              skview.presentscene(scene)         }     } } 

and in menuscene file need init func

init(size: cgsize) {      super.init(size: size)      name = "menuscene" }