[Webkit-unassigned] [Bug 192564] Regression (iOS 12): Keyboard dismissal leaves WKWebView viewport-fit=cover content offscreen

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=192564

--- Comment #5 from Ryosuke Niwa <rniwa at webkit.org> ---
(In reply to David Gölzhäuser from comment #4)
> This issue only occurs in combination with iOS >= 12 and XCode >=10. Apple
> requires developers to build Apps with iOS 12.1 and Xcode 10.1 on March 2019.

Hm... that's strange. Xcode version itself shouldn't affect things. Are you also changing the target SDK when you do that? If so, could you tell us in which target SDK you're seeing the issue in iOS 12?

There are certain features and behaviors we enable only when an app is linked against newer SDKs. So if this problem only occurs with newer SDKs, then I suspect one of those features / behaviors are the cause of it.

> Am I right, after this issue has been fixed Apple needs to pull the latest
> WebKit and implement it into iOS WKWebView, or is there some kind of
> automatic update process?

It depends. At some point, Apple make a branch of WebKit for a given release. If the fix has been landed by the time we made a branch, then the fix is likely to stay in the branch unless it caused a regression, etc... If the fix wasn't made by the time a given branch was created, then we'd have to manually merge it into the branch to be included in the release which uses that branch. There is a number of internal processes Apple uses to determine which change is merged into any given branch/release.

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