Alice ‮May 8, 2023

Anyone familiar with UIKit? Is the forward swipe in Safari a thing UINavigationController does, or is it custom? I'm failing to find any references to it in docs, and from things like https://stackoverflow.com/a/5891661 I can't tell if they are implementing a custom thing or not.

Wondering how to design API around this for AdwNavigationView but can't find any examples of existing API.

EDIT: Answer: it's custom :(

Swipe back and forward on navigationController

Each UIViewController, starting with rootViewController uses [self.navigationController pushViewController nextView] to push new views. Swipe works fine. How can I implement the same behavior for...

Stack Overflow
Show threadnekoMay 8, 2023
@alice I'm just getting started with iOS Dev. I haven't seen it in any other (non browser) apps but I doubt it's Safari only
Show threadAlice ‮May 8, 2023

@jaiden well, it's not Safari-only in any case since it's in WebKit, and so the code is even public[1], but it's incomprehensible.

[1]: https://github.com/WebKit/WebKit/blob/main/Source/WebKit/UIProcess/ios/ViewGestureControllerIOS.mm

WebKit/ViewGestureControllerIOS.mm at main · WebKit/WebKit

Home of the WebKit project, the browser engine used by Safari, Mail, App Store and many other applications on macOS, iOS and Linux. - WebKit/ViewGestureControllerIOS.mm at main · WebKit/WebKit

GitHub
Show threadnekoMay 8, 2023
@alice Deer Lord I can barely read this
Show threadJamie  ‮May 8, 2023
@jaiden @alice it’s readable, but incredibly overcomplicated
Show threadAlice ‮May 8, 2023
@jamie @jaiden well, I can't even tell if it's using a UINavigationController or not... It is mentioned in other parts of the code, but not sure about this specific one (like there is some in WKContentViewInteraction.mm)
Show threadJamie  ‮May 8, 2023
@alice @jaiden I don’t see anything about a UINavController personally
Show threadAlice ‮May 8, 2023
@jamie @jaiden me neither... But there's also not a lot of code for actually doing the transition, so presumably it is using something
Show threadAlice ‮May 8, 2023
@jamie @jaiden HMM. Unless it's using private API. Just looked up _UINavigationParallaxTransition, found https://github.com/MP0w/iOS-Headers/blob/master/Compare_Latest/Frameworks/UIKit/_UINavigationParallaxTransition.h. It's not documented, but it would explain it I guess...
iOS-Headers/_UINavigationParallaxTransition.h at master · MP0w/iOS-Headers

iOS 5.0/5.1/6.0/6.1/7.0/7.1/8.0/8.1 Headers of All Frameworks (private and not) + SpringBoard - iOS-Headers/_UINavigationParallaxTransition.h at master · MP0w/iOS-Headers

GitHub
Show threadJamie  ‮
@alice @jaiden It’s always private APIs
May 8, 2023 at 3:12pmWeb
Show threadJamie  ‮May 8, 2023

@alice @jaiden That or it’s APIs that don’t cleanly have a cross platform variant

* Jamie still wonders how she’ll test that she didn’t break everything with WebExtensions *

Show threadAlice ‮May 8, 2023
@jamie @jaiden well yeah, none of that is cross-platform. But like, here's the GTK one for comparison: https://github.com/WebKit/WebKit/blob/main/Source/WebKit/UIProcess/gtk/ViewGestureControllerGtk.cpp
WebKit/ViewGestureControllerGtk.cpp at main · WebKit/WebKit

Home of the WebKit project, the browser engine used by Safari, Mail, App Store and many other applications on macOS, iOS and Linux. - WebKit/ViewGestureControllerGtk.cpp at main · WebKit/WebKit

GitHub
Show threadJamie  ‮May 8, 2023
@alice @jaiden much more readable although I still hate trying to read c++