Why is a Launch Image needed despite having a Lauch Screen File?

Question

In iOS 10 I used a Launch Screen File instead of Launch Images:

After converting to Swift 4 in Xcode 9 for iOS 11 I get the following warning:

Missing "[email protected]" launch image

Why is a launch image needed when there is already the launch screen?

Answer 1

The solution was to temporarily add a launch image asset catalog.

1. Click on Use Asset Catalog...:

2. Choose to create a new asset catalog:

3. Switch back to Don't use asset catalogs:

4. Delete the automatically created Images.xcassets.

5. The warning is gone.