xcode - Changing background color of NSView in Swift 2.0 -

i trying change background color of nsview , have tried 1 of solution outlined in this answer. however, it's not working me. missing here? should use viewwillappear() here or meant ios?

related code:

class viewcontroller: nsviewcontroller {      override func viewdidload() {         super.viewdidload()         self.view.wantslayer = true      }      override var representedobject: anyobject? {         didset {         // update view, if loaded.         }     }      override func awakefromnib() {         if self.view.layer != nil {             let color : cgcolorref = cgcolorcreategenericrgb(1.0, 0, 0, 1.0)             self.view.layer?.backgroundcolor = color         }      } } 

p.s - i'm new os x/ios programming , trying figure way out through documentation , existing solutions. using xcode 7 beta 4.

import cocoa  class viewcontroller: nsviewcontroller {      override func viewdidload() {         super.viewdidload()          view.wantslayer = true         view.layer?.backgroundcolor = nscolor(red: 1, green: 0, blue: 0, alpha: 1).cgcolor      }      override var representedobject: anyobject? {         didset {          }     } }