The Screen Class provides convenient methods for retrieving the Device Screen Size in iOS and the Window Size on OSX.
The values of the Screen class are actually the size of the Director's GLView.
Point representing the center of the Screen
background_sprite = Sprite.position Screen.center, file_name: 'background.png'
Useful method for presenting background Sprites or Layers on the center of the Screen.
The Width of the Screen:
The Screen size divided by two:
The Height of the Screen
The Height of the Screen divided by two: