Delay in setting background color of collection view.

[ashiqsulaiman]

Everytime i toggle the theme and navigate to the home screen which is a collection view. it takes a second to apply the theme. how to instantly apply the theme to all the VCs at once.

I use this code in the collection view's cell MainArticleCell.appearance().mixedBackgroundColor = MixedColor(normal: kPBGNormal, night: kPBGDark)