No more scrolling with iOS 15.1

[tifroz]

This can be reproduced with the demo app running iOS 15.1 (screen capture)

RPReplay_Final1635358896_480p.mov

[chinh-tran]

AMScrollingNavbar/Source/ScrollingNavigationController.swift

Line 588 in 5016bc1

navigationBar.frame = frame

Apparently moving the navbar using the frame property no longer works with iOS 15.1 (https://developer.apple.com/forums/thread/691975).

An alternative is to use CGAffineTransform, which seems to fix the issue:

navigationBar.transform = CGAffineTransform(translationX: 0, y: navigationBar.transform.ty - delta)

[TheDreamsWind]

I'm experiencing similar problem under iOS 14.5, and as far as i'm concerned the linked discussion has nothing to do with the library, since it modifies the nav. ber on behalf of the view controller owning it.

[guicolares]

Thanks @chinh-tran , I had the same bug and resolved it with this fix. May I create a PR ?

my fix branch

[dongtg-1485]

@guicolares
Thanks for your pull request. But when you use CGAffineTransform to update NavigationBar, topViewController.view.frame was not updated when scroll slowly.
I think we need to find an other solution.

[closure11]

@andreamazz Do you have any ideas about this? Apparently the main feature of this library was broken.

[andreamazz]

@andreamazz Do you have any ideas about this? Apparently the main feature of this library was broken.

Nope, I need to find the time to test this. Did anyone test against 15.2 beta by any chance?

[dungInte]

I have the same problem too. if use the transform by chinhtran it helps scroll to the top but navigation will lag frame size and title too.

[anhnt2309]

Any update on this? This break my app on app store.

[andreamazz]

I've looked into this, honestly I don't know how to fix it, you can see during the scrolling that UIKit is fighting against both the frame change and the opacity change, I'm afraid that's not much we can do at this point. I was hoping for an issue with 15.1, but 15.2.1 behaves the same. Why did they start enforcing this with 15.1 is beyond my comprehension.

[Okizeme]

I think that answer from Apple might interest you: https://developer.apple.com/forums/thread/691975