这个答案是更新的Xcode 13。

App Store Connect目前要求以下类别的图像:

iPhone 6.7”显示屏

这是1290 x 2796像素。您可以使用以下模拟器来创建这些截图:

iPhone 14 Pro Max

iPhone 6.5”显示屏

这是1242 x 2688像素。您可以使用以下模拟器来创建这些截图:

iPhone 13 Pro Max iPhone 12 Pro Max iPhone 11 Pro Max iPhone XS Max iPhone XR

iPhone 5.5”显示屏

这是1242 x 2208像素。您可以使用以下模拟器来创建这些截图:

iPhone 8 Plus iPhone 7 Plus iPhone 6s Plus

iPad Pro(第三代)12.9英寸显示屏

这是2048 x 2732像素。您可以使用iPad Pro(12.9英寸)(第五代)模拟器创建此大小的图像。

iPad Pro(第二代)12.9英寸显示屏

这是2048 x 2732像素。这是与iPad Pro(12.9英寸)(第五代)完全相同的尺寸，所以大多数人可以在这里使用相同的截图。但是看看这个。

笔记

Data source: Official Screenshot specifications page on the Apple site. Thanks to this answer for the link. Not all of the devices listed above produce the exact pixel dimensions listed, but Apple seems to accept the proportions. Use File > New Screen Shot (Command+S) in the simulator to save a screenshot to the desktop. On a real device press Sleep/Wake+Home on the iPhone/iPad (images available in Photo app) The pixel dimensions above are the full screen portrait orientation sizes. You shouldn't include the status bar, so you can either paste background color over the status bar text and icons or crop them out and scale the image back up.

iTunes connect可接受以下分辨率:

iPhone 3+4 (3.5 Inch) 640 x 960 iPhone 5, iPhone 5S, iPhone 5C (4 Inch) 640 x 1136 iPhone 6, iPhone 6S, iPhone 7, iPhone 8 (4.7 Inch) 750 x 1334 iPhone 6 Plus, iPhone 6S Plus, iPhone 7 Plus, iPhone 8 Plus (5.5 Inch) 1242 x 2208 You need the screenshot in this resolution, the phone scales them down to 1080 x 1920 iPhone X (5.8 Inch) 1125 x 2436 iPhone XR (6.1 Inch) 828 x 1792 iPhone XS (5.8 Inch) 1125 x 2436 iPhone XS Max (6.5 Inch) 1242 x 2688 iPad Mini 2, iPad Mini 3, iPad Mini 4 (7.9 Inch) 1536 x 2048 iPad 3, iPad 4, iPad Pro, iPad Air, iPad Air 2 (9.7 Inch) 1536 x 2048 iPad Pro (10.5 Inch) 1668 x 2224 iPad Pro (12.9 Inch) 2048 x 2732 Apple Watch Series 1, Apple Watch Series 2, Apple Watch Series 3 - 38mm (1.5 Inch) 272 x 340 Apple Watch Series 4 - 40mm (1.57 Inch) 394 x 324 Apple Watch Series 1, Apple Watch Series 2, Apple Watch Series 3 - 42mm (1.65 Inch) 312 x 390 Apple Watch Series 4 - 44mm (1.78 Inch) 448 x 368

甚至苹果关于此事的文件也不完整。

更新:苹果公司推出了一个新的媒体管理器，它只需要你为最大的iPhone和/或iPad设备创建艺术品。将为您创建较小的图像。请注意，如果您以前没有创建iPad Pro图像，那么现在必须创建(如果您支持iPad)。

更新:现在支持新设备的截图和应用程序预览。

这个答案是更新的Xcode 13。

App Store Connect目前要求以下类别的图像:

iPhone 6.7”显示屏

这是1290 x 2796像素。您可以使用以下模拟器来创建这些截图:

iPhone 14 Pro Max

iPhone 6.5”显示屏

这是1242 x 2688像素。您可以使用以下模拟器来创建这些截图:

iPhone 13 Pro Max iPhone 12 Pro Max iPhone 11 Pro Max iPhone XS Max iPhone XR

iPhone 5.5”显示屏

这是1242 x 2208像素。您可以使用以下模拟器来创建这些截图:

iPhone 8 Plus iPhone 7 Plus iPhone 6s Plus

iPad Pro(第三代)12.9英寸显示屏

这是2048 x 2732像素。您可以使用iPad Pro(12.9英寸)(第五代)模拟器创建此大小的图像。

iPad Pro(第二代)12.9英寸显示屏

这是2048 x 2732像素。这是与iPad Pro(12.9英寸)(第五代)完全相同的尺寸，所以大多数人可以在这里使用相同的截图。但是看看这个。

笔记

Data source: Official Screenshot specifications page on the Apple site. Thanks to this answer for the link. Not all of the devices listed above produce the exact pixel dimensions listed, but Apple seems to accept the proportions. Use File > New Screen Shot (Command+S) in the simulator to save a screenshot to the desktop. On a real device press Sleep/Wake+Home on the iPhone/iPad (images available in Photo app) The pixel dimensions above are the full screen portrait orientation sizes. You shouldn't include the status bar, so you can either paste background color over the status bar text and icons or crop them out and scale the image back up.

 1)iPhone X screenshot support in iTunes Connect.October 27, 2017.

 2)You can now upload screenshots for iPhone X. 
  You’ll see a new tab for 5.8-inch displays under Screenshots and App Previews on your iOS app  version information page.

 3)Note that iPhone X screenshots are optional and cannot be used for smaller devices sizes. 
  5.5-inchdisplay screenshots are still required for all apps that run on iPhone.

 4)iPhone X Screenshot Resolutions
  1125 by 2436 (Portrait)
  2436 by 1125 (Landscape)

我把这个页面收藏起来，经常回头看，但没有人提到更新的11英寸iPad pro的尺寸。1668 x2388。

下面是一个bash脚本，它将通用屏幕截图调整为适当的尺寸。到2020年，我还不能让iPhone 4模拟器在最新的xcode中运行，所以这对我来说是必要的。

#!/usr/bin/env bash

HERE="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

declare -A sizes
sizes["6-5-inch-iphone-xs-max"]="1242x2688"
sizes["5-8-inch-iphone-x"]="1125x2436"
sizes["5-5-inch-iphone-6"]="1242x2208"
sizes["4-7-inch-iphone-6"]="750x1334"
sizes["4-inch-iphone-6"]="640x1096"
sizes["3-5-inch-iphone-4s"]="640x920"
sizes["12-9-inch-ipad-pro-@3"]="2048x2732"
sizes["12-9-inch-ipad-pro-@2"]="2048x2732"
sizes["11-inch-ipad-pro"]="1668x2388"
sizes["10-5-inch-ipad-pro"]="1668x2224"
sizes["9-7-inch-ipad"]="1536x2008"

for i in "${!sizes[@]}"; do
    if [[ "$i" == *"ipad"* ]]; then
        [ -d "$HERE/ipad" ] || continue
        mkdir -p "$HERE/$i"
        cd "$HERE/ipad"
        for file in *.jpg; do
            [ -e "$file" ] || continue
            convert "$file" -resize "${sizes[$i]}"\! "$HERE/$i/$file"
            echo "scaled $file"
        done
    else
        [ -d "$HERE/iphone" ] || continue
        mkdir -p "$HERE/$i"
        cd "$HERE/iphone"
        for file in *.jpg; do
            [ -e "$file" ] || continue
            convert "$file" -resize "${sizes[$i]}"\! "$HERE/$i/$file"
            echo "scaled $file"
        done
    fi
done

要使用它，将它放在一个新目录中，并在它旁边创建一个/iphone和/ipad目录。把你的ipad和iphone截图放在这些文件夹里。运行该脚本，它将生成所有大小的命名文件夹。

ios_screenshots/
├── run.sh
├── iphone/
│   ├── screenshot_1.jpg
│   ├── screenshot_2.jpg
│   ├── screenshot_3.jpg
├── ipad/
│   ├── screenshot_1.jpg
│   ├── screenshot_2.jpg
│   ├── screenshot_3.jpg

对于xcode 11.1，不包含iPad pro iPad Pro (2nd Gen) 12.9" Display在终端运行此命令

xrun simctl创建iPad Pro(12.9英寸)(第二代)“com.apple.CoreSimulator.SimDeviceType。iPad-Pro——12-9-inch 2 nd-generation - com.apple.CoreSimulator.SimRuntime.iOS-13-1”

看这里