What are sizes/naming of the launch images used for iPhone app in iOS?
Size Conventions
iPhone3g : 320 x 480
iPhone4/4s : 640 x 960
iPhone5/5s : 640 x 1136
iPhone6 : 750 x 1334
iPhone 6plus : 1242 x 2208
Naming Conventions
For developers who don't wan't to use 'Asset Catalogs', they need to give specific names to launch images
iPhone3g : 'Default.png'
iPhone4/4s : '[email protected]'
iPhone5/5s : '[email protected]'
iPhone6 : '[email protected]'
iPhone6plus : '[email protected]'
For developers who would use 'Asset Catalogs', they don't need to give specific names to launch images
Go to ProjectSetting -> General-> Under 'App Icons and Launch Images', select 'Use Asset Catalog' for 'Launch Image Source', and drag-drop the launch images for their OS version's/Orientations