Appleリジェクト対策 - 掲載スクショの画像比率には気をつけろ！

概要

ゲームアプリをAppleStoreの審査に提出したところ、以下のような内容でリジェクトされた。

Guideline 2.3.3 - Performance - Accurate Metadata
We noticed that your screenshots do not sufficiently show your app in use. Specifically, your iPad screenshots reflect an iPhone image stretched out to appear to be an iPad image.
To help users understand your app's functionality and value, your screenshots should highlight your app's core concept. For example, a gaming app should feature screenshots that capture actual gameplay within the app.
Next Steps
Please revise your screenshots to ensure that they accurately reflect the app in use on the supported devices.
Keep in mind the following requirements:
- Marketing or promotional materials that do not reflect the UI of the app are not appropriate for screenshots.
- The majority of the screenshots should highlight your app's main features and functionality.
- Confirm that your app looks and behaves identically in all languages and on all supported devices.
- Make sure that the screenshots show your app in use on the correct device. For example, iPhone screenshots should be taken on iPhone, not on iPad.
Please see attached screenshots for details.
1, 2, 3, 4
Since your App Store Connect status is Metadata Rejected, we do NOT require a new binary. To revise the metadata, visit App Store Connect to select your app and revise the desired metadata values. Once you've completed all changes, reply to this message in Resolution Center and we will continue the review.

要約すると、ストアに掲載しているiPadのスクショの画面比率がiPhoneなので変えて下さい、というもの。
画像サイズ自体はiPadのサイズにしていたのだが、その画像の中に埋め込んでいたスクショの比率が16:9だったので駄目だった模様。
画像そのものの加工自体は問題ないので、ちゃんと中のスクショもiPad比率で撮っておこう。