Fix content offset at about screen

[akarataev]

https://phabricator.wikimedia.org/T229528

Screenshots

[montehurd]

Thanks for the PR! 😀

There's a weird offset issue (bug?) with iOS 12 that we've had to work around in the past, but in this particular case there may be a simpler fix using this special top fragment.

[montehurd]

Any time to double-check the possible fix I mentioned? 🤔

[tonisevener]

@akarataev also just a heads up - our develop branch has been updated for Xcode 11 beta 7, in case you start seeing build errors

[akarataev]

@montehurd hello,

thanks for the hint, I'll check it such soon as possible.

[akarataev]

Hello @montehurd, @tonisevener

I've updated the branch. New solution is based on iOS12yOffsetHack and JavaScript.
I couldn’t make a result with top fragment, because it also has an incorrect offset.

[montehurd]

[wv loadHTMLFromAssetsFile:kWMFAboutHTMLFile scrolledToFragment:@"#top"];

^ this change to L134 seems to work on my end... though I haven't tested all scenarios🤞. Is it give you an incorrect offset?

[akarataev]

Oh, you right, it works fine. It strange because <a href="#top"> under WebView works incorrect.
Thanks for good point and patience. I've updated branch.