swift - Sprites disappear from scene when change the size of screen -

i coding first game using sprite kit.

i added boundary around scene when have different screens different devices, shows there gap region , sprites disappear screen when reach gap region. know how set boundary automatically screen size when changing screen size?

try this

let scene = gamescene(size: skview.bounds.size) 

this take current game scene, scene , set boundaries of of screen. hope helps :d