In this article I will describe how to add landscape launch images to your iPhone app. Landscape launch images are only supported on iPad apps (Apple Documentation).
Bellow I have listed the steps in order to circumvent this issue and add landscape images to your iPhone app.
Step 1: Add the Landscape Launch image(s) to your project
Provide the following images (just copy them to your project):
Apple doesn’t have landscape launch image for iPhone or iPod, so we need to provide rotated 90 degree of landscape image.
Just for the reference the iPad images would be:
Step 2: Don’t use asset catalogs
Go to your project’s settings -> General -> Launch Images and choose Don’t use asset catalogs.
Xcode should have automatically detected the images from Step 1. If not select them manually.