I just bought a new iPhone XR so I could make the screenshots for my App Store app. Starting March 27th 2019, you need to provide 6.5" (new phone models) screenshots:
However, App Store Connect is not accepting my screenshots made with this device. After further research, I found out that iPhone XR is actually 6.1":
I am not from the iOS world (I mainly work with Google and Android), so I am wondering if I am missing something, or are the docs wrong?
The iPhone XR and iPhone XS Max are the same size: 414x896. The reason your screen shot is coming out the wrong size is that the iPhone XR is double resolution, where as the iPhone XS Max is triple resolution. But that's not a problem. If your screen shot is coming out as 828x1792, just run it through any basic image-munging app, such as Preview, and change the size to 150% of its current size:
828 * 1.5 = 1242
1792 * 1.5 = 2688
That gives you the required size, 1242x2688.
(Note, however, that you do not need any device merely in order to generate a screen shot acceptable to the App Store. Screen shots from the various Xcode Simulators will do just fine. Even an app that has functionality that doesn't quite work on the Simulator can be tweaked to generate its normal interface so that you can take the screen shot. I have nine apps currently on the App Store, each with an accepted set of screen shots, and not one of those screen shots was taken on a device.)
The table is slightly misleading, the inclusion of the iPhone XR in that list actually means that it will show the iPhone XS Max screenshots if you visit the App Store listing of your app from an iPhone XR.
What is actually relevant when uploading a "6.5 inch" screenshot is the required size of the image, which is 1242x2688 or 2688x1242 pixels. The screenshots made on an iPhone XR are 828x1792 pixels in size (source: iosres.com), that's why your screenshots got rejected.
Although iPhone XR and XS Max screens has the same size in terms of POINTS, they are not the same in terms of PIXELS (and inches).
XR: 6.1in, 828x1792 @2x
XS Max: 6.5in, 1242x2688 @3x <--- you want this one.
There is confusion for required size because the spec says to use 6.5in screen for both XR and XS Max, implying they're both the same size.
Just use the XS Max simulator to take screenshots and you should be good. I tried it just now, got the needed size.
来源：https://stackoverflow.com/questions/55971326/screenshots-made-on-an-iphone-xr-are-not-accepted-for-6-5-inch-screenshots-on-ap