on Safari there is no resize event on mobile, so if your browser has a toolbar that can be toggled (it will change the container size), you need to also handle the resize event by calling `.stage.updateScreenSize();`, the patch is removed from UIStage.ts in this commit.
on Safari there is no resize event on mobile, so if your browser has a toolbar that can be toggled (it will change the container size), you need to also handle the resize event by calling `.stage.updateScreenSize();`, the patch is removed from UIStage.ts in this commit.

jcyuan/FairyGUI-PixiJS