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

Hope this will solve all your issues related to customised edge to edge image.
Xcode 6 - xcassets for universal image support

Make sure if you are using auto layout then check pin is set to zero for all edges and constraints to margin is un checked.

You can also visit this links for launch screen images:
http://www.paintcodeapp.com/news/iphone-6-screens-demystified
http://www.paintcodeapp.com/news/ultimate-guide-to-iphone-resolutions