Upon researching on SO about optimizing my app to support the new iPhone 6/6+ screen sizes, I read about naming conventions like @2x and @3x, located in these threads:
Image Resolution for new iphone 6
iPhone 6 vs iPhone 5 image naming convention
I know that to ensure the app does not expand to fill the bigger screen, making icons and fonts look blurry, you need to include the LaunchScreen.xib file for the iPhone 6/6+ on iOS 8, and static launch images for anything else.
I achieved that and tested it on all the iphone platforms, and it scales fine. I named them appropriately as:
Default.png Default@2x.png Default-568h@2x.png
But what about regular images I use as backgrounds, buttons, labels, etc? I just use plain old image1.png, image2.png, etc.
Do I have to follow the naming convention of image1@2x.png and image1@3x.png appropriately to be fully optimized?