title: Global function call in Swift? Howto?
body: <p>I have a Swift noobie question on class method calls. I'm building a simple learning app for my kids using Sprite Kit. I have a global variable scoreCount defined in GameScene, where I pretty much do all my game logic such as detect correct answer and increment scoreCount. I also have GameOverScene. On both I show the Score -label. I'm keeping count of scores with the scoreCount-parameter (in GameScene). However as I'm quite new to Swift and Sprite Kit, I'm wondering how should I update the score label in GameViewController? So basically I would like to call GameViewController.updateLabels() from GameScene.</p>
  
  <p>I know this isn't the ideal way but please share your solution concept on this. Thanks!</p>