How to specify size for iPhone 6/7 customised edge-to-edge image?

Question

Say I want a bundled image to take up all available screen width in an iPhone app - for example a banner. I\'d create my_banner.png with width 320px

Answer 1

There is no native Assets support for this case, so I think it would be better to do it manually as working with undocumented file names may break easily in the future.