I am confused by conflicting information.
Most commonly I see these being the sizes quoted for the various Default images:
Launch image Portrait Default-Portrait.png 768 x 1004
Launch image Portrait
[email protected] 1536 x 2008
Launch image Landscape
[email protected] 2048 x 1496
Launch image Landscape Default-Landscape.png 1024 x 748
Seemed like slightly unusual sizes, but I went along with it and dragged the images into the Launch images section in XCode.
XCode however promptly puts little yellow triangles over these images and tell me that the sizes should be:
768x1024, 1536x2048, 1024x768 and 2048x1536
Oh and one last important bit. Do I really need to have all these images for submission to the app store? It's really not clear which images are required and which are just recommended.
Mine is a Universal app btw if that makes any difference.