Image assets are now preferred over resources in IOS, which supports to upload only 3 versions of the image. 1x, 2x & 3x.
But there are number of device resolutions to support on iPhones
640x1136 - 5 series
750x1334 - 6, 6s, 7, 8
1242x2208 - (6, 6s, 7, 8) plus
1125x2436 - X, XS
828x1792 - XR
1242x2688 - XS Max
I can understand what 1x, 2x & 3x resolutions are, eg. if 1x size is 414x896 than 2x vesion is 828x1792 and 3x is 1242x2688
But I can not understand which 3 image sizes to upload to support all devices, so that complete image appear full screen on all devices without cutting the edges of the image?