Xcode 9 not finding assets after using xcode 10

Question

I downloaded Xcode 10 to test some new features on a project, Now when I reopen the same project on Xcode 9. It seems that Xcode can't find any assets ( images)

This would work fine on Xcode 10 :

let image = UIImage(named: "AsunnyDay")
// this would find the correct image

However, on Xcode 9

let image = UIImage(named: "AsunnyDay")
//image would be nil

I guess it's something related to XCode 10 categorizing the assets as either for dark appearance or light. but I don't understand why would Xcode 9 not find them.

Answer 1

Guys this is how I fixed it.

1. Open project in Xcode 10 beta
2. Go to the assets
3. Select all the images you have
4. In the inspector, you will have an option to choose the appearance type. Choose Any, Light,Dark
5. This will create extra placeholders for other images:
6. Open Project in Xcode 9. the assets will look something like this
7. Reorder the 1x , 2x , 3x into place.
8. Delete the extra unassigned placeholders
9. Done