I need a full screen background image for my iPhone app. I have seen this doc
It was helpful but my question is, we tens to have 1x, 2x, 3x resolutions for the image in iOS, but as per the document all the plus devices 6+,7+, 8+ renders 3x and iPhone X renders 3x but the resolutions is different for those devices, so how can I pick a single image with 3 resolutions that fits all the device screens? from iPhone 5 - iPhone X ?